2017 Vol. 7, No. 3

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Research Progress of Test System for Mountain Orchard Rail Conveyor
Wu Weibin, Yang Xiaobin, Zhang Zhenbang, Zhang Cheng, You Zhanhui, Liang Guoming
2017, 7(3): 1-5.
Abstract(615) [PDF 2926KB](227)
Abstract:
China is rich in fruit trees，and it is the largest producer and consumer of fruits in the world.Most fruit trees were planted on hilly slopes that caused fruit transportation difficulties.Mountain orchard rail conveyor can transport fruits and agricultural materials under large slope and no road conditions of mountain orchard.And its market demand is getting bigger and bigger.The research of mountain orchard conveyor domestic and abroad mostly remains in the mechanical part，but less research is done on the test system.Practical and reliable test system is helpful to improve the quality and operation safety of rail transporter.Research and application status of test system for mountain orchard rail conveyor domestic and abroad were introduced.Existing problems were pointed out.And the future development trend was prospected.
Development Status and Trend of Seed Corn Harvester in China
Liu Shuping, Tang Zunfeng
2017, 7(3): 6-8.
Abstract(348) [PDF 5055KB](125)
Abstract:
On the basis of analyzing development status of seed corn harvester at home and abroad，development factors restricting mechanization of seed corn harvesting in China were summarized.Developing trend was look forward.It provided reference for future research of seed corn harvester.
Application Status of Orchard Plant Protection Machinery in Beijing City
Zhou Juguo
2017, 7(3): 9-11.
Abstract(345) [PDF 440KB](104)
Abstract:
Orchard planting situation，prevention and control points of fruit tree diseases and insect pests were introduced.Application status and technical status of orchard plant protection machinery were analyzed.Characteristics of several representative plant protection machinery products were enumerated.Development direction of orchard plant protection machinery was pointed out.It provided reference for relevant scientific research units and manufacturers to develop new products of orchard plant protection machinery.
Development and Innovation of Seeding Machinery in China
She Daqing
2017, 7(3): 12-14.
Abstract(353) [PDF 400KB](87)
Abstract:
Seeding machinery is a planting machine based on crop seeds.It occupies an important position in agricultural production of our country.Since the founding of new China，the development of seeding machinery in China has experienced four stages including introduction and imitation，independent design and development，improving product structure，and rapid development.Product and technical features in each stage were summaried.Development trend of technology was prospected.It provided reference for scientific research units and production enterprises to develop seeding machinery.
Use and Adjustment of 4LB-1450 Type Half Feed Rice Combine Harvester
Jin Baoxing, Wang Nan, Guo Yong
2017, 7(3): 15-16.
Abstract(448) [PDF 332KB](126)
Abstract:
Main component structure，operation note，operation and adjustment method for key parts of domestic 4LB-1450 type half feed rice combine harvester were introduced.It provided reference for user′s correct and efficient use.
Development and Thinking of Agricultural Machinery Safety Supervision in China
Lu Haifei
2017, 7(3): 17-18.
Abstract(333) [PDF 299KB](101)
Abstract:
Agricultural machinery safety supervision is an important measure and means to ensure safety，scientific and harmonious development of agricultural mechanization.Development process and achievements of agricultural machinery safety supervision in China were summarized.And some thoughts were puts forward.
Information Technology Adoption Behavior and Driving Factors of Farmers′ Facility Vegetables
Zhang Biao, Zhang Lingxian, Fu Zetian, Wang Jieqiong
2017, 7(3): 19-23.
Abstract(598) [PDF 852KB](107)
Abstract:
In order to explore adoption behavior and its driving factors of agricultural information technology in rural households，based on adoption behavior theory，the data of vegetable growers in Shandong and Beijing was analyzed.Results showed that farmers could fully understand advantages of facility vegetable information technology，and great potential for popularization.However，at present，the rate of information technology popularization of protected vegetable was low，and the average adoption rate was 28.38%.And Shouguang households have a higher acceptance rate of 16.96% than those in Beijing.There were significant differences in characteristics of facilities，the adoption of the information technology and the farmers who did not adopt it.The input cost was the main factor before adoption of technology.Farmers′ access to relevant information channels was relatively single，government promotion was the main mode of technology diffusion，and farmers were most worried about that technical effect was not obvious.
Autonomous Navigation Device of Farmland Operating Machinery Based on Android Platform
Yan Yinfa, Zhang Senyan, Song Zhanhua, Li Fade, Zhang Xiaohui, Sun Xuezhen, Song Hualu
2017, 7(3): 24-28.
Abstract(521) [PDF 1534KB](115)
Abstract:
In order to realize unmanned automatic operation of farmland operating machinery and reduce labor investment，an automatic navigation device for farmland operating machinery based on Android platform was designed.The device was composed of machinery control module，Android control terminal and Difference Global Positioning System（DGPS）static station.A new path tracking algorithm was embedded in the device.The algorithm drawn a circle in the neighborhood and found intersection of the circle with planning path and determined direction of motion.The algorithm could greatly improve control accuracy of farmland operating machinery.By the field test，it was found that the device had advantages of high precision，low cost and good stability.
Design on Farmland Environment Monitoring APP Based on Android
Chen Jing, Kuang Yingchun, Wang Ge, Yang Cheng
2017, 7(3): 29-32.
Abstract(493) [PDF 2180KB](163)
Abstract:
In order to adapt to efficient and energy-saving development of modern agriculture，the system of farmland environment monitoring based on android platform was designed，which realized function of monitoring farmland environment timely and remotely.It used sensor technology to collect information from farmland environment and send information to the cloud via wireless.The users could use APP to monitor farmland environment remotely and intelligently when they visit the data in cloud.Test results showed that the data transmission accuracy rate was 100%，the operation was reliable and software was practicability.
Development of Straw Mushroom Cultivation Control System Based on Modbus Bus and Web Technology
Zeng Wenguo, Sun Bo, Yang Yanxin, Li Qi, Zhao Xixi
2017, 7(3): 33-35.
Abstract(378) [PDF 486KB](127)
Abstract:
At present，straw mushrooms digitization and automation cultivation in our country are many unreasonable links in production，in order to promote progress of straw mushroom cultivation techniques，more advanced computer control system for cultivation environment is needed to develop.CS structure software and configuration control system were used to realize control server-side data acquisition and intelligent control.To meet needs of mushroom flexible control room environment，user remote concurrent connection operation interface，supplemented by RS485 distributed control structure were used to improve independence，consistency and reliability of system.
Design and Implementation of Xinjiang Rural E-Government System Based on JavaEE：A Case Study of Awat‘Fanghuiju’Work Management Information System
Zhang Yifan, Jiang Ping′an, Yan An, Wu Hongqi, Sun Xia
2017, 7(3): 36-40.
Abstract(710) [PDF 1979KB](111)
Abstract:
With continuous development of rural society economy，demand for informationization of rural government management has become increasingly prominent.Design and development of‘Fanghuiju’work management information system has great significance for improving the Xinjiang rural government service and management level.The system combined geographic information（GIS）technology，massively heterogeneous data processing technology，Service-Oriented Architecture（SOA），applying JavaEE platform and Oracle database.This system taken the‘Fanghuiju’village work group，county，township and village as the main objects of service.The‘Fanghuiju’work management information system helped to manage a large number of isolated data at the village level scientifically and effectively，unified coordination of information uploaded and issued.It provided technical support for‘Fanghuiju’work and rural information service，which made it convient，efficient and professional.
Application of Wireless Sensor in On-line Monitoring Inclination of Agricultural Machinery
Zhou Ping
2017, 7(3): 41-43.
Abstract(548) [PDF 2127KB](84)
Abstract:
A kind of wireless sensor-based high agricultural machinery tilt on-line monitoring system was presented，which displayed real-time tilt.When tilt was to set value，it alarmed and started emergency response.The system used distributed wireless gateway for data transfer.
Application and Development Trend of Virtual Reality Technology in Tea Field
Gao Jing
2017, 7(3): 44-46.
Abstract(505) [PDF 527KB](88)
Abstract:
With development of virtual reality technology，‘VR+’can be extended to various fields.In the field of agriculture，the combination of virtual reality technology and agricultural products is not only conducive to the promotion of agricultural products，but also has a positive effect on agricultural science，agricultural products，agricultural tourism and so on.Application of virtual reality technology in the field of tea exhibition was analyzed，The potential of virtual reality technology for tea product promotion，yield increase and tea garden tourism was also explored.At the same time，the development prospect of virtual reality in tea field was forecasted.
Design on Agricultural Motor Control System
Ma Shitong, Yang Yu
2017, 7(3): 47-49.
Abstract(539) [PDF 434KB](126)
Abstract:
Motor selection of digital agriculture platform was analyzed.It obtained that brushless DC motor should be chosen for digital agriculture platform.Based on DSP technology，and its own characteristics，motor control system design and implementation were completed.In addition，design content included detection circuit，drive circuit and power supply design.Research of motor control system played a great promoting role for digital agriculture，especially for high precision requirements of industry and agriculture.
Construction of Digital Resources Evaluation System for Agricultural University
Chen Na
2017, 7(3): 50-51.
Abstract(561) [PDF 306KB](96)
Abstract:
Based on understanding of digital resource concepts and methods of digital resource evaluation，evaluation and construction of digital resources with knowledge ontology were expounded.At the same time，concrete work in the development of agricultural university digital resources evaluation system was put forward.In fact，evaluation of digital resources combined with knowledge ontology has important value，and it was guarantee to further realize digital resources evaluation in our country.Digital resources can deeply influence and promote service level of digital resources in colleges and universities，and guide evaluation of digital resources through the index.
Application of Computer and Information Technology in Agricultural Production
Sun Jin
2017, 7(3): 52-53.
Abstract(258) [PDF 305KB](173)
Abstract:
With depth of modern agriculture construction，the role of computer and information technology in agriculture is becoming more and more outstanding.At present，the development of modern agriculture has such problems as deterioration of ecological environment，problem of food safety and lack of agricultural competitiveness.To solve these problems，it is necessary to support development of agricultural informatization.Necessity of applying agricultural informatization to agricultural production was discussed，and 7 platforms and 3 projects of information technology applied in agricultural production were studied.
Research Progress of Using Organic Wastewater to Cultivate Spirulina
Zhao Xiaorong, Chang Rong, Lv Bingxin, Yang Xiaohui, Li Bosheng
2017, 7(3): 54-59.
Abstract(496) [PDF 755KB](125)
Abstract:
Feasibility of organic wastewater culturing of Spirulina was summarized.Likewise，types of organic wastewater and experimental research advancement of organic wastewater culturing of Spirulina were pointed.Simultaneously，advantages，disadvantages and potential applications of organic wastewater culturing of Spirulina were analyzed.Eventually，research direction of organic wastewater culturing of Spirulina was outlooked.
Catalytic Hydrothermal Treated Bamboo Particle Reinforced Properties of Bamboo-plastic Composites
Qian Xiangqun, Wang Hui, Sheng Kuichuan
2017, 7(3): 60-64.
Abstract(274) [PDF 3485KB](101)
Abstract:
Bamboo particle was hydrothermally treated with NaOH，Na2SiO3 and K2CO3 catalysts，and then bamboo plastic composites were prepared by hot pressing molding with PVC.Chemical composition and SEM analysis of bamboo particle and the performance test of composite materials were carried out before and after treatment.The compatibilization between treated bamboo particle and PVC matrix interface was discussed.And effect of type and concentration of the catalyst on the mechanical performance and water resistance were assessed.Results showed that the catalytic hydrothermal treatment could improve compatibility of bamboo particle and PVC matrix，and the distribution of treated bamboo particle in PVC matrix was more uniform.The type and concentration of catalyst had significant effects on the physical and mechanical properties of the composites.With concentration of the catalyst increasing from 0.5%，1%，to 2%，the mechanical strength of the composite increased at first and then decreased，the tensile strength reached the maximum value at 1% K2CO3 treatment，the bending elastic modulus reached the maximum value at 1%Na2SiO3 treatment，the static bending intensity reached the maximum value at 2%K2CO3 treatment.The 2 h water absorption，2 h and 24 h thickness expansion rate of the composites reached the minimum value at 1%Na2SiO3 treatment，and the water absorption of 24 h reached the minimum value in the 2%Na2SiO3 treatment.
Comparison of Membrane Separation Effects on Treating Liquid Digestate from Large-scale Chicken Farm Biogas Engineering
Chen Xiang, Pan Jun, Wu Jinhai, Yao Jiangang
2017, 7(3): 65-69.
Abstract(515) [PDF 706KB](140)
Abstract:
Considering difficulty of treating large amounts of liquid digestate from large-scale chicken farm biogas engineering，pilot scale integrated membrane separation equipment was developed.The separation effect of membrane technology on the reduction of COD，ammonia nitrogen and nutrients in the liquid digestate was studied.Results showed that process combination of‘bag filter+ultrafiltration（UF）+nanofiltration（NF）+reverse osmosis（RO）’achieved the COD rejection rate of 96.5%，and the ammonia nitrogen rejection rate of 63.8%.Through process combination of‘bag filter+UF+two-stage RO’，COD in the final permeate was reduced to 66 mgL with COD rejection rate up to 99.2%，while ammonia nitrogen in the final permeate was reduced to 530 mgL with ammonia nitrogen rejection rate of 82.4%.Process of‘UF+two-stage RO’achieved better separation effect on chicken manure liquid digestate than‘UF+NF+RO’.Humic acid and amino acid in the liquid digestate was concentrated under the action of RO.RO concentrate could be further used for production of liquid fertilizer or for other development and utilization.
Velocity Characteristics for Mixture of Ceramic Balls and Biomass Chars in Incline Tube with Different Cross-section Shape
Yang Yanqiang, Dai Shiqun
2017, 7(3): 70-74.
Abstract(461) [PDF 963KB](78)
Abstract:
To explore movement law of biomass chars and ceramic balls mix flows in the incline tube with different cross-section shape，cold state PIV analog equipment was designed.Flow of ceramic balls （diameter of 1，2 and 3 mm） and biomass char with different mass ratio （10∶1，30∶1 and 50∶1） in three different cross-sectional shapes （circular，semi-circular half-square and square） of inclined tubes （X= 1190 mm cross section in steady flow phase） by PIV technique were studied.Results showed that：in the inclined tube with three different cross-section shape，the distribution of biomass char axial mean velocity in the yd = 0-1 range shape was similar to ‘hysteresis loop’.When mixing quality ratio was 10∶1，the biomass char axial mean velocity distribution was not affected by different cross-section shape，it could use square tube or semi-circular half-square tube instead of circle tube in experiments of inclined tube.When ceramic sphere diameter was 1 and 2mm，mixed particle mass ratio of 30∶1 and 50∶1，the biomass char axial mean velocity distribution was affected by different cross-section shape，it could not use square tube or semi-circular half-square tube instead of circle tube in experiments of inclined tube.
Effect Comparison of UASB and UBF on Landfill Leachate Treatment under High Organic Loading
Pan Jun, Yao Jiangang, Gong Yabin, Cao Xuewei, Bao Haijun
2017, 7(3): 75-78.
Abstract(545) [PDF 728KB](146)
Abstract:
Under the condition of（38±2）℃，landfill leachate was treated by UASB and UBF anaerobic technology under high organic loading rate.Results showed that in the anaerobic process，the organic loading rate increased to 15 kg COD（m3·d）and HRT was 5 d.In UASB anaerobic reactor，raw material gas production rate was 25.4~29.6 m3t，the removal rate of COD could be more than 94%，volumetric biogas production rate was 5.77~6.02 m3m3，content of CH4 was more than 70%，and pH was 7.21~8.25.In UBF anaerobic reactor，raw material gas production rate was 22.7~25.4 m3t，removal rate of COD could be more than 90%，volumetric biogas production rate was 4.99~5.60 m3m3，content of CH4 was about 66%，and pH was 7.29~8.01.UASB anaerobic technology was better than UBF anaerobic technology in the treatment of landfill leachate.
Present Situation and Development Potential of Renewable Energy Heating in China
Ge Hui, Li Yanyan, Yang Lin, Guo Zhiqiang
2017, 7(3): 79-81.
Abstract(381) [PDF 472KB](92)
Abstract:
Renewable energy heating technology can be used to replace traditional energy heating，which relieve the growing impact of smog.Development status and problems of renewable energy heating technology were introduced，including solar energy，biomass energy and geothermal energy.The potential of renewable energy for heating in the future were analyzed.Suggestions were also given from aspects of policy，technology and standard system.It could provide consultation for researchers in the field.
Status and Problems of Straw Comprehensive Utilization in Wuqing District of Tianjin City
Zhang Xuejing
2017, 7(3): 82-84.
Abstract(558) [PDF 477KB](114)
Abstract:
Actively exploring comprehensive utilization way of straw，vigorously promoting straw resource utilization，and playing its proper economic，ecological，social and environmental benefits，have important political，economic and social significance to maintain social harmonious and stable development，promote construction of rural new energy，and safeguard normal order of social and economic life.On the basis of introducing value of straw utilization，present situation and existing problems of straw utilization in Wuqing district of Tianjin city were analyzed，and relevant suggestions and measures were put forward to promote comprehensive utilization of straw.
Current Situation and Countermeasures of Ecological Agriculture in China
Ning Weijing
2017, 7(3): 85-86.
Abstract(522) [PDF 307KB](72)
Abstract:
Agricultural economy develops rapidly in our country，agricultural economic development has brought serious challenges to development of ecological agriculture.Many people ignore the protection of ecological agriculture for the sake of agricultural economic development，and make a lot of damage to eco-agriculture.The industrialization of agriculture should be upgraded so as to bring about more sustainable development for eco-agriculture.Eco-agriculture is an effective and scientific management on the basis of traditional agriculture.It makes economic benefits and natural benefits combine better，so as to promote efficient utilization of ecological agriculture.Development model and countermeasures of eco-agriculture were discussed and analyzed，and corresponding countermeasures and suggestions were put forward，which could provide theoretical reference for relevant departments.
Design of Sample Display Device for Agricultural Ecological Garden
Li Guorui
2017, 7(3): 87-88.
Abstract(460) [PDF 323KB](149)
Abstract:
The ecological landscape design often involves landscape design sample display device，in order to meet the growth of plants，and provide suitable environment for plant growth.Application of display device is convenient for cultivation of special plants in the landscaping of garden plants.The sample display device was simple in structure and operation，and high in production efficiency.
Development Status and Countermeasures of Grain Drying Mechanization Technology in Tianjin
Bo Keming, Shen Tianbing, Wang Jianping, Ma Chao
2017, 7(3): 89-91.
Abstract(206) [PDF 493KB](79)
Abstract:
Grain drying mechanization is an important link in achieving entire mechanization，which is of great significance to ensure food security，reduce labor investment and increase farmers′ income.Development status of grain drying mechanization technology in Tianjin was analyzed，and main problems were summarized，including high cost，low industrialization level，the market was not standardized etc.Countermeasures suggestions were put forward.
Improvement of Determination Method for Methanol Content in Liquor
Wang Gang, Jia Lifeng
2017, 7(3): 92-94.
Abstract(439) [PDF 464KB](110)
Abstract:
To improve determination method of methanol content in liquor，using magenta sulphurous acid method for determination of methanol content in liquor，interference in the determination was analyzed systematically，and effect of amount of oxalic acid-sulfuric acid addition，color rendering temperature and color time on the test results was discussed.It was concluded that the amount of oxalic acid-sulfuric acid was 0.5 mL，color temperature 20~25 ℃ and chromogenic time 30 min，as the best determination conditions.The improved determination method could make methanol content determination of experimental results more accurate and better reproducibility.
Evaluation of Carbon Footprint and Application of Carbon Label in Almond Cake with Pork
Chen Zhendong, Zhang Yanjie, Hu Zhigao, Cai Xiaoyan
2017, 7(3): 95-99.
Abstract(338) [PDF 1777KB](99)
Abstract:
Carbon footprint assessment and carbon labels application on products provides internally greenhouse gas emission reduction measures and improvement of product technology for enterprises.And it also provides the carbon footprint information for public or other third parties，as to enhance core competitiveness of products.An overview of the carbon footprint evaluation and carbon label application in meat almond cake，specific elaborating product carbon footprint assessment procedures and carbon label application were introduced，in order to provide references for domestic food enterprises to carry out product carbon footprint and carbon label work.
Separation Purification and Free Radical Scavenging Activity of Polysaccharide from Flammulina velutipes Germanium Riched
Ge Zhichao, Chen Hongwei, Zhu Yunlan, Chen Anhui, Zheng Yi, Fu Shiyu, Shen Mingyu, Zhou Mi
2017, 7(3): 100-104.
Abstract(179) [PDF 832KB](64)
Abstract:
Flammulina velutipes strain was used as research material，germanium enriched hyphae was obtained by fermentation technology，and polysaccharides were separated and purified by DEAE cellulose and G-100 chromatography column.Antioxidant activity of germanium enriched Flammulina velutipes polysaccharide in vitro was studied.Experimental results showed that，a single component polysaccharide was obtained by separation and purification，purity 99.78%，nonprotein.Ge content in mycelium was 7.42 mgg，percent conversion of organic Ge was 6.25%.Antioxidant ability enhanced significantly of polysaccharide purified and effectively scavenged oxygen free radical，hydroxyl radical and DPPH，they had significant difference compared with blank control.Scavenging rate of free radical increased with concentration of polysaccharide Ge enriched.When the polysaccharide concentration was 900 μgmL，scavenging rate of oxygen free radical，hydroxyl radical and DPPH was 68.16%，64.26%，64.3%，respectively.The polysaccharides Ge-riched had potential to developed into a natural antioxidant，functional foods or drugs.
Production Process Optimization of Fish Balls Using Low-value Fish
Yu Qiuqiang
2017, 7(3): 105-109.
Abstract(385) [PDF 617KB](72)
Abstract:
Production process of high-quality fish balls using low-value fish was discussed.Sensory results showed that：TG enzyme，starch and egg white could effectively improve fish ball color，fresh taste，elasticity and organization.Adding amount of TG enzyme in 0.5%~1%，addition amount of starch in 5%~15%，addition amount of egg white in 5%~15% were fish production process for adding range.Orthogonal table L9（34）was used to determine physical properties of fish balls，and best processing by using low-value fish.Elasticity，hardness，gumminess，chewiness and other physical properties，were measured by texture instrument，gel strength of surimi was calculated.Optimum process formulation was fish 100 g，TG enzyme 1 g，starch 15 g，egg white 10 g，salt 1.5 g，sugar 1.5 g，MSG 1.5 g，onions ice water 20 g，and pepper 0.15 g.
Analysis and Prediction on Investment in Water Conservancy Construction in China
Mi Yong, Mi Qiuju, Wang Jie, Wei Chunmei, Zheng Hao
2017, 7(3): 110-112.
Abstract(412) [PDF 437KB](92)
Abstract:
China is vast in territory and is rich in water resources.China′s water resources account for 6% of the world′s total freshwater resources and rank sixth in the world.But China′s per capita water resources are only 14 of the world average.Major sources of funding and investment use of investment in water conservancy construction nearly 10 years in China were introduced.SPSS statistical software and exponential smoothing model were used to predict the investment of water conservancy in the next few years on this basis.It had reference significance to sustainable development of water conservancy construction in China.
Land Reclamation Development Strategy
Cao Tingting
2017, 7(3): 113-116.
Abstract(382) [PDF 596KB](105)
Abstract:
Through summing up development process and practice of land consolidation in China，problems in the development of our country′s land management and development direction for the future of land management were analyzed.Results showed that land management work of our country had many problems such as scientific guidance was lack，theory system was not perfect，relevant laws and regulations was imperfect，planning and design idea lag，and regulation target was single.In order to solve these problems，ecological civilization should be ultimate goal of land consolidation，‘scientific and technological lead’purpose should be implemented，land renovation concepts should be innovated，ecological landscape and sustainable theory should be integrated，land reclamation planning，design and evaluation system should be perfected，public participation and demonstration construction should be strengthened，to achieve sustainable development of land remediation.
Experimental Study and Optimization Design of Static Stiffness Measurement System of Lathe
Wang Jiwei, Yu Yan, Yu Wenjuan, Sun Zongxin
2017, 7(3): 117-121.
Abstract(416) [PDF 3471KB](93)
Abstract:
In order to effectively suppress effect of external vibration on measurement results by three-dimensional static stiffness instrument and enhance inherent response frequency of three-dimensional static stiffness instrument，design method of tree-dimensional static stiffness instrument which was based on Hypermorph shape optimization was put forward.Taking maximization of first order natural frequency as target optimization function，shape optimization model of three-dimensional static stiffness instrument was created.Static stiffness of lathe was tested by optimized three-dimensional static stiffness tester through LabVIEW virtual technology.Measurements of natural frequency of vibration of the first 6 order and LabVIEW software system showed that the first order natural frequency of optimized three-dimensional static stiffness tester was obviously higher than that before optimization.It had better vibration suppression performance.And optimized three-dimensional static stiffness meter was more accurate.The method was of practical significance for design of engineering structures with external disturbances.And the use of LabVIEW virtual technology could improve automation and efficiency of experimental test.
Design and Dynamic Simulation on Compression Mechanism of Four-twine Big Rectangular Bale Pickup Baler
Li Wei, Wang Qiang, Yang Li, Dai Xiaojun, Sun Wenting, Meng Yugang
2017, 7(3): 122-125.
Abstract(487) [PDF 1754KB](96)
Abstract:
In the design process of four-twine big rectangular bale pickup baler，taking piston as the object of study which was key working parts of compression mechanism，3 dimensional model of piston parts and assembly was established by SolidWorks software.Dynamic simulation on piston was made by ADAMS software.Simulation time was 5 seconds and piston compression frequency was 42 rmin.Simulation results showed that piston stroke was 710 mm，maximum value of piston compression pushing speed was 0.85 ms，maximum value of return speed was 0.91 ms，acceleration range of piston was from －1.58 ms2 to 2.21 ms2，maximum value of the force in X direction of hinge of piston and connecting rod was 2 788 kN，torque range of crank uniform speed rotation was from －264.4 N·m to 174.4 N·m.Simulation results provided theoretical basis for optimal design of compression mechanism of four-twine big rectangular bale pickup baler.It shortened design cycle and improved design efficiency.
Simulation and Optimization of Scissors Fork Mechanism of Lifting Platform
Hu Fusheng, Liu Wenxi, Li Xiugang, Li Si, Lan Libo, Liang Lei
2017, 7(3): 126-129.
Abstract(230) [PDF 4543KB](79)
Abstract:
In order to streamline and optimize scissors fork mechanism of lifting platform，kinematics and dynamics simulation of scissors fork mechanism were carried out by using CADCAE software.Size of hydraulic cylinder was determined.Force on hinge point of scissors fork under dangerous conditions was analyzed.Finite element analysis of scissors fork arms was made.Stress distribution diagram and deformation distribution diagram of scissors fork arms were obtained.Structure of optimized scissors fork mechanism of lifting platform was simpler and its manufacturing cost reduced.Optimized mechanism had wide application prospect.
Design of Detachable Modular Micro-tillage Machine
Lin Changshan, Li Jian, Lan Zhiqiao, Li Zhongxin, Ye Dapeng
2017, 7(3): 130-134.
Abstract(382) [PDF 3025KB](83)
Abstract:
In view of great gap of cultivated land in the hilly areas of south China and difficult to transfer tillage machines in the field，a modular micro tillage machine which could be quickly assembled and disassembled，easy to transfer and work well was designed taking LZ-1WG4.2Q type micro tillage machine as prototype.The main parts of engine transition section，transmission transition section and resilient power frame assembly were designed.Strength checking of weak parts was made.Static and modal simulation analysis of key components were carried out by finite element method.Analysis results proved that the design was reasonable and reliable.It would provide reference for modular and portable production of mountain micro-tillage machine in the future.
Design of 4GL-140 Type Flax Harvester
Zhang Yifeng
2017, 7(3): 135-137.
Abstract(229) [PDF 3266KB](88)
Abstract:
In view of the lack of suitable machinery for flax harvest in Shanxi province，4GL-140 type flax harvester was successfully developed by improving design of important work parts based on wheat swather.It could harvest flax，also could harvest wheat，and minor cereals such as naked oats，peas and beans.Many uses of a machine was realized.The machine filled the gap in Shanxi′s flax harvest machinery and had wide application prospect.
Practice and Research of Machining Shaft Parts of Crawler Tractor Using Turning instead of Grinding
Che Zhanzhan, Zhang Jinhui, Peng Shuguang, Dong Jianmei
2017, 7(3): 138-141.
Abstract(298) [PDF 3530KB](57)
Abstract:
Processing technology and accuracy requirements of shaft parts of crawler tractor were analyzed.Feasibility and applicability of processing mode that using turning instead of grinding was determined.Promotion economy of the scheme was verified.Verification processing of several types of shaft parts was carried out by CNC machine tools with better accuracy.By comparing different metal material，heat treatment mode，external surface hardness，shape characteristic and processing mode of shaft parts，selecting different kinds of machined cutting tools，inserts，and corresponding cutting parameters，so as to determine a kind of processing technology that could meet the needs of product process and was simple and feasible.And this process was extended to other types of parts processing gradually.Finally，quality of crawler tractor was improved and process of parts was improved.
Teaching Reform of Experimental Design and Statistical Analysis for Agricultural Machinery Specialty
Wang Xianren, Jin Xin, Geng Lingxin, Li Xinping, Pang Jing, Zhou Hanmi
2017, 7(3): 142-145.
Abstract(486) [PDF 609KB](90)
Abstract:
Experimental Design and Statistical Analysis is a required course for graduate students of agricultural machinery specialty.Learning of the course lays foundation for the follow-up research of graduate students.However，there are some problems in the course of teaching，such as disconnection of theory and practice，little interaction between teachers and students，and complexity of calculation.Teaching content of the course was discussed on the basis of practical needs.Key points of the software were introduced combined with requirements of teaching program and functions and characteristics of Matlab data processing system.Some ideas and measures for teaching reform based on combination of teachers′ scientific research subjects and practical problems of enterprises were put forward.Practice proved that students′ interest in learning and ability to solve problems have been improved.
Reform and Practice of Training Mode for Full-time Engineering Professional Degree Postgraduates：Taking Food Engineering Field of Guangdong Ocean University as an Example
Liu Shucheng, Li Yulin, Ji Hongwu, Zhong Saiyi, Zhang Chaohua
2017, 7(3): 146-149.
Abstract(408) [PDF 630KB](81)
Abstract:
Regarding full-time food engineering professional degree postgraduates of Guangdong Ocean University as an example，based on analysis of existing problems in original training mode，the curriculum system reform，the double-division instructor team establishment，practice base establishment，thesis quality control，and so on，were carried out.Some achievements were obtained.Finally，developing reform and upgrading plan in the future were put forward.It was hoped that our experience could provide some references for development of other professional degree postgraduates.
Teaching Reform of Basic Theory and Practice of Mechanical Manufacturing Based on Engineering Education Accreditation
Xiao Zhifeng, Zhang Fan, Wu Nanxing
2017, 7(3): 150-152.
Abstract(181) [PDF 492KB](74)
Abstract:
In order to cultivate high-quality engineering science and technology talents needed for development strategy of Made in China 2025，in view of teaching situation and existing problems of two basic course including Mechanical Manufacturing Foundation an Metal Technology for undergraduate major in mechanical engineering，taking Jingdezhen Ceramics Institute as an example，teaching reform and innovation of Basic Theory and Practice of Mechanical Manufacturing based on engineering education accreditation were carried out.The course combined existing knowledge framework and practice system of fundamentals of Mechanical Manufacturing Foundation and Metal Technology.Organic combination of theoretical teaching and practical training was emphasized.Practice of teaching reform showed that content of courses was optimized and integrated，teaching methods were improved.It laid foundation for study of following specialized courses and provided useful reference for teaching practice of basic courses in mechanical engineering and near mechanical specialty.
Effects of Combined Modifier on Lead Accumulation and Nutritional Quality of Cucumber
Hu Liping, Zhou Guoxing, Liu Guangmin, Wang Yaqin, He Hongju
2017, 7(3): 153-158.
Abstract(160) [PDF 1135KB](68)
Abstract:
In order to verify remediation effect of combined modifier on lead contaminated of cucumber soil，pot experiments were carried out to study the effects of different combinations of modifiers on soil physical and chemical properties，microbial community structure，lead accumulation and nutrient quality in cucumber fruit in two lead contaminated soils.Results showed that after applying combined modifiers，the organic matter contents，bacterial numbers，actinomycetes numbers，and total microorganism amounts of the 800 mgkg and 1 200 mgkg of lead polluted soil increased by 34.02% and 25.96%，5.25 times and 4.93 times，17.86% and 233.33%，and 2.72 times and 4.32 times，respectively.However，applying modifier had no significant effect on pH of soil.Moreover，after applying combined modifiers，lead and crude fiber contents in cucumber fruits planted in the 800 mgkg and 1 200 mgkg of lead polluted soil decreased by 54.85% and 30.17%，and 24.59% and 23.61%，respectively.Furthermore，contents of vitamin C，soluble sugar，and soluble fixation of cucumber fruits largely improved.Therefore，security and nutritional quality of fruit of cucumber planted in lead polluted soil obviously improved comparing with no modifier application.Test results indicated that combined modifiers could be used in the in situ repair of lead polluted soil.
Effects of Different Seed Coating Agents on Corn Growth，Disease and Pest Control
Yue Jin, Wang Pinshu, Zhang Jinliang, Guo Shuchen, Dong Jie, Yuan Zhiqiang
2017, 7(3): 159-162.
Abstract(495) [PDF 558KB](85)
Abstract:
In order to screen seed coating formula suitable for corn growth and pest control，6 kinds of seed coating agents were selected and 5 kinds of treatment combinations were set up.Pest control，encourage growing and increase production effect were evaluated through field test.Test results showed that Gaoqiao 300 mL，Dingmiaoxin 100 mL，Likexiu 100 mL and Pulvtong 375 g had better encouraging growth and increasing production effect，which achieved 18.5%.And the effect of pest control was preferable.The control effect of underground pest，aphids and brown blotch were 85.94%，95.09% and 77.06%.
Prediction of Corn Growth Based on Digital Image Processing Technology
Zhang Baolai, Zhang Lejia
2017, 7(3): 163-168.
Abstract(196) [PDF 2957KB](65)
Abstract:
Corn growth refers to status and trends of corn growth.In the growth period，the key of corn production regulation is to real time know growth.Growth of corn can be measured by leaf area，tip distance of leaf and leaf base angle.Jilin province is the main corn planting area in China and planting scale is mostly small plots.If traditional manual method was used to measure growth of corn，it would take a lot of manpower and material resources.While remote sensing technology was suitable for planting in a large area.Therefore，manual measurement and remote sensing technology had obvious limitations.Digital image processing technology was used and multi scale images of corn at different growth stages were obtained by fixed image acquisition equipment.First，grayscale and enhancement techniques were used to preprocess images.Then，an iterative threshold segmentation algorithm was used to extract corn region in the image.Parameters of corn plant height，tip distance of leaf，leaf base angle and canopy area were obtained through image thinning technology which combined with reference calibration method.Finally，corn growth model was established by regression analysis on acquired characteristic parameters.Test results showed that the method was effective and feasible.And it could be served as a necessary and useful supplement to manual measurement and remote sensing technology.
Cultivation Techniques of Oversummer Tomato in Plastic Greenhouse
Liu Kejian, Lu Yang
2017, 7(3): 169-170.
Abstract(416) [PDF 350KB](128)
Abstract:
Key cultivation techniques of oversummer tomato in plastic greenhouse were introduced.Key problems of disease and insect pests which restricted high quality and high yield of oversummer tomato were emphatically solved.It provided technical references for growers in same climate zone and using same planting pattern.
Development Countermeasures of Low Carbon Agriculture in Zhejiang ProvinceBased on Foreign Experience
Zhang Songxin
2017, 7(3): 171-174.
Abstract(132) [PDF 626KB](65)
Abstract:
Under the background of new economy，low carbon agriculture is the inevitable choice of national agricultural construction.It is the proper meaning of realizing sustainable development of economy.At present，domestic and international low-carbon agricultural research literature is rich.Development of low carbon agriculture in foreign countries were researched from strategy selection，policies and regulations system，agricultural regulation means and financial support and other aspects of experience.Combined with actual development of low carbon agriculture in Zhejiang province，development countermeasures of low carbon agriculture in Zhejiang were put forward.
Preliminary Discussion on Development of Protected Agricultural Cluster in Beijing According to‘the 13th Five-Year Plan’
Wang Nan, Tianzhu Zhang
2017, 7(3): 175-177.
Abstract(430) [PDF 480KB](145)
Abstract:
Preliminary Discussion on Development of Protected Agricultural Cluster in Beijing According to‘the 13th Five-Year Plan’
Reform Path of Low Carbon Agricultural Development in Shaanxi Province
Yuan Liang
2017, 7(3): 178-180.
Abstract(376) [PDF 488KB](86)
Abstract:
Shaanxi，as a large agricultural province in western China，has the problems of high consumption of resources，serious environmental pollution and weak agricultural competitiveness.The development of low-carbon agriculture plays an important role in promoting competitiveness of agriculture in Shaanxi province，promoting transformation and upgrading of agriculture and increasing income of farmers.Starting from the government governance，strengthening the top-level design of governance system to establish strong coordination mechanism，improving government regulatory level to achieve low-carbon agriculture all-round and whole process supervision and management，promoting scientific level of government to improve government decision-making quality，improving level of public service government，and establishing government governance responsibility system were powerful points to promote development of low carbon agriculture in Shaanxi province.
Economic Benefit Comparison between Rice Manual Transplanting and Mechanical Transplanting
Tan Dunyong
2017, 7(3): 181-183.
Abstract(505) [PDF 400KB](85)
Abstract:
Rice mechanical transplanting is key control link of mechanized rice production.It is a solid guarantee for realization of agricultural modernization.Compared with traditional manual transplanting，mechanical transplanting has advantages of high efficiency and high economic benefit.At Fengda Agricultural Machinery Professional Cooperatives in Dongkou county of Hunan Province，comparative experiment of yield and economic benefit between rice manual transplanting and mechanical transplanting was carried out to lay a solid experimental foundation for large-scale mechanized agricultural operation in the future.
Influence Factors and Countermeasures of Development of Circular Agriculture in China
Jiang Fengxiang
2017, 7(3): 184-186.
Abstract(218) [PDF 493KB](130)
Abstract:
Connotation and characteristics of circular agriculture were firstly introduced.Then four kinds of existing development pattern were introduced and its problems were analyzed.Some suggestions were put forward on the development of circular agriculture in China combined with experience of developed countries’circulation agricultural development.
Influence of Diversification on Performance of Agricultural Listed Companies
Zhong Lihan, Yu Jing
2017, 7(3): 187-188.
Abstract(369) [PDF 302KB](97)
Abstract:
Agricultural listed companies reflects development of China′s agricultural enterprises as a leader in the agricultural industry in a certain degree.The diversification of agricultural enterprises has become a common phenomenon currently.Impact of diversification strategy on corporate performance was analyzed using data of agricultural companies.It found that diversification has a negative impact on corporate performance， especially for private companies， and China′s agricultural listed companies diversified business strategy need to be improved.
Rural Tourism and Solution of the‘Three Rural’Issues
He Xia
2017, 7(3): 189-190.
Abstract(230) [PDF 328KB](78)
Abstract:
With continuous development of national economy，rural tourism has become a new form of tourism.Through rural tourism，in addition to the development of rural economy，but also could solve problem of agriculture，rural areas and farmers.Take rural tourism and the settlement of‘three rural issues’as the goal，current situation of rural tourism development in our country was firstly introduced，promoting role of rural tourism in solving the problems of‘three rural issues’was expounded.Countermeasures of strengthening rural tourism economy reform and breaking‘three rural issues’were finally put forward to better promote rural tourism to solve‘three rural issues’.
Thoughts and Suggestions on Developing Agricultural Eco-tourism
Li Yaya
2017, 7(3): 191-192.
Abstract(459) [PDF 355KB](68)
Abstract:
Agricultural eco-tourism is the combination of ecological agriculture and tourism.It originates from agriculture，builds in the countryside，benefits farmers and serves the ‘three rural issues’.It is a combination of production，life and ecology，spanning the 123 industry，beneficial to agricultural efficiency，increasing farmers′ income and rural prosperity.It is an important part of modern agriculture.Its meaning，characteristics，significance，ecological environment protection，existing problems and suggestions were elaborated.

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