农业工程

Development Status and Trend of Dual-purpose Self-propelled Boom Sprayer in Paddy Field and Dry Field in China

YANG Xuejun, YAN Herong, ZHANG Tie, DONG Xiang, SUN Xing

2020, 10(11): 1-5.

Abstract(432) [PDF 1139KB](73)

Abstract:
Based on analysis of technical characteristics of dual-purpose self-propelled boom sprayer in paddy field and dry field in Japan and South Korea，development of related technologies and models in China was introduced.Through comparison，technical problems and the gap between them were pointed out，and development trend of related products was pointed out.The aim was to improve technical level of dual-purpose self-propelled boom sprayer in paddy field and dry field in China.

Current Situation and Solution of Vegetable Potato Mechanization Production in Shandong Province

LUAN Xueyan, ZHU Yuehao, LI Kunpeng

2020, 10(11): 6-11.

Abstract(355) [PDF 726KB](56)

Abstract:
Mechanized production status of vegetable potato in Shandong province was discussed.Some problems of mechanized production were pointed out from planting scale，pattern and planting equipment.In order to solve these problems，according to characteristics of potato planting，combined with existing mechanized production equipment and actual situation of production，based on experience of many demonstrations，a set of reasonable solution of potato mechanization production was put forward.This solution covered some key technical points and corresponding usage of supporting equipment.This program was of great significance to enlarge potato planting scale and promote healthy and sustainable development of potato industry in Shandong province.

Study on Dryer Configuration Scheme for Grain Production and Management Entities of Different Scales

WU Ranran, HE Chaobo, CAI Haitao

2020, 10(11): 12-16.

Abstract(325) [PDF 231KB](8)

Abstract:
Current dryer configuration mode and existing problems of dryer owners were investigated and understood.Dryer configuration mode was analyzed from aspects of drying service area，drying operation volume，drying operation time and drying production benefit of different scale grain production and operation entities，so as to provide reference for users to configure dryers.

Development Status and Trend of Smoke Machine

MA Jie, PAN Jiangru, HE Long, TONG Lingru

2020, 10(11): 17-23.

Abstract(272) [PDF 286KB](6)

Abstract:
Development history and classification of foggers at home and abroad were introduced.Concepts of fog，atomization and secondary atomization were analyzed，and influencing factors of atomizing droplets were also analyzed.Through analysis of combination of smog machine and other technologies，three core challenges faced by smoke machine were combed，including intelligent informatization，environmental protection and working environment，and countermeasures were put forward，so as to provide reference for further development of smoke machine.

Application of Management System of Comprehensive Experiment Platform about Agricultural Machinery Equipment

ZHENG Huimei, YU Xiaobo, TAN Zengxin, WANG Hengyi, JIN Xiaoyan

2020, 10(11): 24-28.

Abstract(299) [PDF 898KB](47)

Abstract:
According to laboratory business and quality management process，management system of comprehensive experiment platform about agricultural machinery equipment was developed.The system could organically combine data factors such as personnel，instruments，reagents，methods，environment and files.It could effectively integrate and share large-scale instruments through sharing platform，and provide sharing services for both inside and outside of research institute，so as to realize online appointment and audit functions of shared instruments.

Research and Application of Image Recognition Technology for Litchi Diseases and Insect Pests

OU Shanguo, ZHANG Guixiang, PENG Xiaodan

2020, 10(11): 29-35.

Abstract(278) [PDF 2772KB](9)

Abstract:
Litchi is one of Guangdong Lingnan characteristic fruit industry and one of Guangdong top 10 speciality crops.Although modern production technology of litchi has been greatly improved in recent years，climate conditions in Guangdong are easy to cause pests and diseases，which has a serious adverse effect on yield and quality of open-air growing litchi in Guangdong，which hinders development of litchi industry and income of growers.Therefore，it has great practical significance to promote development of litchi brand industry and increase income of litchi growers.Research and application of image recognition technology for litchi diseases and insect pests were carried out by using convolution neural network algorithm.It mainly included two aspects：one was to discuss image recognition technology for litchi diseases and insect pests；the other was to explore construction of a new type of meteorological defense system of diseases and insect pests based on Guangzhou intelligent agrometeorological service platform.In other words，it not only provided Litchi growers with intelligent identification service of litchi images，but also provided them with knowledge of diseases and insect pests as well as prevention suggestions.It also constructed“personal space”for growers to realize targeted early warning，and gradually built a personalized litchi base disease forecasting and early warning model to explore litchi disease forecasting and diagnosis combined service model.Therefore，innovation of this paper was to explore how to realize image recognition technology and to study stereoscopic defense measures.

Design of Egg Weighing and Sorting System for Micro Egg Poultry Breeding Industry

CAO Lijuan, WANG Wanjun

2020, 10(11): 36-39.

Abstract(253) [PDF 897KB](35)

Abstract:
An egg weighing and sorting system for micro egg poultry breeding industry was designed.The system based on single chip microcomputer as core and six curved pallets as the mass bearing surface，by key module set weighing weight level，using parallel hole 6 double cantilever beam measuring strain sensors corresponding to curved surface in the tray.The weight and grade of each curved surface tray were displayed by LCD.The system was compact and easy to use.Compared with egg distribution mode of one person and one scale，efficiency of egg separation was greatly improved.For the large-scale assembly line egg separation mode，the cost was greatly reduced and flexibility was relatively high，which was suitable for egg rapid weighing and sorting in the micro egg poultry breeding industry.

Design and Use of Decontamination and Drying Station for Transport Vehicles in Pig Farm

YU Guoxing, YU Guohong, SHI Xiaoyan, CAO Jianbin, WEI Bo, HUANG Hua, HU Boli

2020, 10(11): 40-44.

Abstract(335) [PDF 1134KB](65)

Abstract:
Epidemic prevention and control is one of the most important work in pig farms.Effective measures should be taken to cut off spread of pathogens.It is better to establish decontamination and drying stations for transport vehicles in pig farms.Combined with advanced technical experience of foreign countries and current situation of domestic industry，as well as development needs of disinfection and epidemic prevention in pig farms，process flow of high efficiency standard was formulated，and classification，characteristics，selection and application of equipment were described in detail，so as to provide certain theoretical basis and practical reference for facilities and equipment of detoxification and drying of transport vehicles under construction.

Simulation Study on Ammonia and Hydrogen Sulfide Absorption in Livestock and Poultry Yard Based on Response Surface Method

LI Xiang, XU Ying, XING Feiyue, GUO Peng, LIU Bo, HAN Yujie

2020, 10(11): 45-51.

Abstract(289) [PDF 1007KB](37)

Abstract:
Based on response surface methodology，a self-developed cage gas absorption device was constructed to simulate emission characteristics of ammonia and hydrogen sulfide in enclosed large-scale farms.Taking pH value of phosphoric acid absorption solution and concentration of sodium carbonate modified activated carbon impregnation solution as design factors，relevant mathematical model was established，and response surface model was obtained to obtain optimal process parameters.Results showed that absorption rate of ammonia and hydrogen sulfide was affected by concentration of activated carbon impregnation solution more than by change of pH value of phosphoric acid.Mathematical model and response surface of ammonia absorption rate and hydrogen sulfide absorption rate were reasonable（correlation coefficient was 0.9910 and 0.987 1 respectively）.Optimum process parameters were as follows：pH value of phosphoric acid absorption solution was 5.25，concentration of impregnation solution of activated carbon modified by sodium carbonate was 6.3%.Under this condition，absorption rate of ammonia gas was 98.978%（relative error was 0.005%），hydrogen sulfide absorption rate was 90.837%（relative error was 0.006%）.

Influence on Soup Cooking Pot on Flow Field Distribution of Food Stewing Process

ZHENG Shaobin, TONG Canhao, CHEN Shu, ZENG Xiaofang, XIA Yangkai

2020, 10(11): 52-57.

Abstract(306) [PDF 1050KB](51)

Abstract:
Choosing proper pot to cook soup to reduce energy consumption and ensure high quality of soup is current concern of food scholars and people.Based on this，numerical simulation method was used to perform finite element analysis on the stew pot of purple sand and stainless steel.Fluid-solid coupling method was used to simulate flow field.It was analyzed in two sides of field distribution and energy efficiency.Characteristics of stewing process in pot with different material were discussed.Results showed that purple casserole had slow heating and stratification in velocity distribution，which was suitable for cooking for a long time of more than 105 minutes.Stainless-steel pot had a stable pressure distribution and ingredient in soup was easy to be heated.It was suitable for short cooking of less than 45 minutes to stew.When soup time was more than 2 hours，heating efficiency of purple clay pots was 19.09% higher than that of stainless-steel pots，which was more energy-saving.

Status and Prospects for R & D on Installation Machinery of Subsurface Land Drain-pipes

GUO Dafang, CHEN Kun, HU Xiaoan, GENG Guanjie, ZHAO Shimeng, CUI Baohui

2020, 10(11): 58-65.

Abstract(365) [PDF 2932KB](50)

Abstract:
Land drainage can remove excess soil water，reduce water table and control soil salinity.Among different land drainage solutions，subsurface pipe drainage has proven in many countries around the world to be the most effective practice suitable for large-area applications.With advance of technology，implementation of drainage project has evolved from manual installation to large-scale fully-mechanized implementation，and the on-grade depth control is realized with laser/satellite positioning system，resulting in substantial increase in working efficiency and accuracy.However，large-scale application of such technology is constrained by its higher lump-sum investment.In this context，the best suitable method should be deliberated by reviewing limitations and advantages of different installation method and availability of installation machinery.Further efforts should be made to explore a complete set of procedures for implementation of subsurface pipe drainage systems and to develop new implementation practices and new materials，in a push to cut down construction cost，reduce investment risk，and improve capacity，efficiency and performance of various installation machines and equipment.Moreover，technical training and international cooperation are indispensable to draw experiences and learn lessons from leading countries for smooth extension of the technology in the saline-alkali areas scattered across China.In the end，the saline-alkali land can be improved on a larger scale and at a reasonable cost so as to stop or reverse worsening ecological environment for a sustainable development of agriculture and forestry industry.

Difficulties and Countermeasures in Circulation of Collective Commercial Construction Land:Based on Analysis of Survey in Xuzhou

KOU Ziwen

2020, 10(11): 66-70.

Abstract(275) [PDF 227KB](42)

Abstract:
The No.1 Central document in 2019 and 2020 continued to focus on issues of agriculture，rural areas and farmers，and proposed to comprehensively push forward reform of collective commercial construction land access to market and accelerate establishment of unified urban and rural construction land market.Based on actual questionnaire data from three survey points in Xuzhou，difficulties in operation of construction land and causes of the dilemma from mid-term and later stages of transfer of collective management construction land in rural areas in Xuzhou were analyzed.From perspective of laws，regulations，government，collective and individual，five suggestions were made to determine the subject，method and price of circulation，and to establish reasonable income distribution mechanism.

Simulation Analysis and Innovative Design of Potato and Soil Transport and Separation Mechanism

GAO Guohua, DONG Bo, YANG Deqiu, LI Bowen

2020, 10(11): 71-78.

Abstract(256) [PDF 2721KB](39)

Abstract:
China is a big country of sweet potato planting，and automatic harvesting machine plays an important role.Sweet potato transportation and separation mechanism is an important mechanism in sweet potato harvester，which has a crucial impact on rate of damaged and exposed potatoes.Through discrete element simulation，impact damage and soil fragmentation effect of sweet potato were analyzed，and optimal parameters were obtained.According to this，design and manufacture of prototype was carried out，and field test was carried out to verify simulation results.According to the TRIZ theory，innovative design of classification collection mechanism was carried out to solve problem of poor classification efficiency.

Optimization Design of New Buckwheat Seed Metering Device

RU Mengfei, ZHANG Jing, LI Zhiwei, ZHENG Decong, ZHANG Xiuquan

2020, 10(11): 79-83.

Abstract(300) [PDF 926KB](58)

Abstract:
Sequence and optimal factor combination of rotation speed of seeding shaft of buckwheat seeding device，number of single-row resisting sleeve holes and speed of seed bed belt on uniformity variation coefficient of sowing amount and average number of seeds in the interval were determined.By designing orthogonal experiment and using extreme range method to analyze orthogonal experiment results，influence degree and optimal combination of various factors on coefficient of uniformity of sowing volume uniformity and average number of seeds in the interval were determined.Using range method to analyze orthogonal results of coefficient of variation，RA=51.74，RB=2.95，RC=12.03；analyzing orthogonal results of average number of grains，RA=5.71，RB=1.25，RC=3.14.The order of variation coefficient affecting uniformity of seeding rate was number of single-row holes in seed-resistance sleeve，speed of seed bed belt and rotation speed of seed shaft.The order affecting average number of particles was number of single-row holes in seed-resistance sleeve，speed of seed bed belt，and rotation speed of seed shaft.Under condition that number of single row holes in seed resistance set was 12，speed of seed bed belt was 5 km/h and rotation speed was 160 r/min，uniformity variation coefficient of sowing rate of buckwheat seeding device reached 20.89%，was the best indicator.

Design and Experiment of Seedbed Inoculating Spraying Fertilization Machine

LI Shengqi, ZHOU Tao, WANG Jiaoyi, LV Hua, QI Zhenhua

2020, 10(11): 84-88.

Abstract(307) [PDF 1872KB](43)

Abstract:
According to principle of bionics and friction inoculation of tobacco Mosaic virus，a minimally invasive inoculating device was designed.The motor was used to drive 800 abrasive cloth strip，and abrasive cloth strip was used to perform minimally invasive friction on smoke seedling.In order to avoid serious damage to delicate smoke seedling，the width of abrasive cloth strip was determined by the test to be 3 mm，and the speed of minimally invasive roller was 70 r/min.In order to facilitate daily management of tobacco vaccine，a tobacco inoculating spraying fertilization machine was designed with functions of inoculation，fertilization and drug spraying.The inoculating spraying fertilization machine was composed of frame，minimally invasive mechanism，control system，drug supplier and walking system.The mobile phone APP developed based on Eclipse was used as upper computer and STM32 as lower computer.Transmission of control instructions between the upper and lower computer was realized via Bluetooth，and conversion of three functions of spraying，fertilization and inoculation as well as control of the advance and turn of all-in-one machine was realized.Experiment showed vaccination rate of that seedbed inoculation spraying fertilization machine reached 87.3%，and index was excellent.Compared with tobacco Mosaic virus artificial inoculation method applied in production，this all-in-one machine achieved multi-purpose，broke through limitation of traditional artificial inoculation method，was minimally invasive and more adaptable，and improved working efficiency to a great extent.

Innovating University Discipline Competition Organization Mechanism to Promote Compound Innovation Talent Training：Taking National College Students Agricultural Construction Environment and Energy Engineering Related Majors Innovation and Entrepreneurship Competition as an Example

DUAN Na, TONG Qin, ZHENG Weichao, WANG Chaoyuan, ZHAO Shumei, LI Baoming

2020, 10(11): 89-92.

Abstract(288) [PDF 715KB](32)

Abstract:
Agricultural construction environment and energy engineering is a typical agricultural engineering major with interdisciplinary characteristics，in order to promote double first-class construction and new engineering construction，to explore new training mode of agriculture-forestry outstanding talents and excellent engineer，China Agricultural University jointly with the Chinese Society of Agricultural Engineering under support of Agricultural Engineering Instruction Committee member of high education of Chinese Ministry of Education，led the national college students agricultural construction environment and energy engineering related majors innovation and entrepreneurship competition.The organization mechanism was innovated in terms of organization mode，subject，activity，cultural construction and others.It provided high quality platform for agricultural engineering discipline construction，practical education and teaching，as well as innovative talent training.

Enlightenment of Teaching Reform of Olin College of Engineering on Development of Agricultural Machinery Specialty in China′s Universities

LI Mingsheng, YE Jin, ZENG Baigong, LIU Jian

2020, 10(11): 93-96.

Abstract(291) [PDF 199KB](34)

Abstract:
Rapid development of China′s agricultural machinery industry needs a large number of outstanding innovative talents.Traditional talent training mode of agricultural machinery specialty in colleges and universities is difficult to meet growth needs of students and demand of agricultural machinery industry for education supply.Starting from the needs，values and pain points of human beings，Olin College of Engineering has carried out teaching reform and cultivated a large number of outstanding engineering innovators.It has become a rising star of engineering education in the United States and even the world.Teaching concept and curriculum system of Olin College of Engineering have important reference significance for development of agricultural machinery specialty in colleges and universities in China.

Several Issues of College Testing Laboratory Management Based on CNAS/CMA

LV Fentao

2020, 10(11): 97-101.

Abstract(292) [PDF 223KB](45)

Abstract:
According to laboratory management practice of the Analysis and Testing Center，Beijing Forestry University，importance and necessity of college laboratories management were discussed，and standardization of management in related details of the laboratory was emphasized.Focusing on links of job responsibilities，fixed assets，laboratory safety，and smooth operation of business rooms，it was expounded that specific content of various measures and normative construction of efficient operation of college laboratories which had passed CNAS/CMA.

Research Progress on Detoxification and Virus Detection Technology of Pepino Melon

JIANG Kang, LUO Junjie, WANG Hongmei, LIU Xinxing

2020, 10(11): 102-106.

Abstract(289) [PDF 240KB](47)

Abstract:
Pepino melon has characteristics of strong adaptability，high nutritional value，high yield and high benefit.It has been promoted throughout country since its introduction，and it plays an important role in strategic adjustment of modern agricultural planting structure.The use of plant stem tip detoxification technology and tissue culture factory seedling breeding technology is the key technology carrier to promote development of large-scale，high-quality，high-efficiency，low-cost，and annual production of pepino melon seedlings.Detoxification and rapid propagation technology of pepino melon were systematically sort out.Research progress of 3 detoxification technologies and 4 virus detection technologies for three major virus diseases of pepino melon，TMV，PMV and CMV，were introduced.Seedlings of pepino melon in China were analyzed.Specific problems and shortcomings in research of virus-free and rapid propagation technology were analyzed.Compared with research progress in related fields abroad，some suggestions were put forward for future research direction of virus-free and rapid propagation of pepino melon seedlings in China，with a view to help Chinese agricultural，scientific Biotech workers and agricultural technology companies provide references.

Main Points of Rice Planting Management Technology in Hainan Province

MO Xiong

2020, 10(11): 107-109.

Abstract(283) [PDF 165KB](53)

Abstract:
Present situation of rice production in Hainan province was described.Main factors restricting further development of rice planting industry in Hainan province were analyzed.According to actual situation of rice planting in Hainan province，key points of rice planting management in Hainan province were discussed in detail in order to promote sustainable development of rice planting industry in Hainan province.

Empirical Research on Relationship between Fixed Assets Investment and Economic Growth in Agricultural Reclamation System

LIU Bingxin, DUAN Yanmin, QUAN Yaling, YAO Yaping, CHEN Yaxin, YANG Jianfei

2020, 10(11): 110-114.

Abstract(250) [PDF 647KB](55)

Abstract:
Current situation of fixed asset investment and economic growth in agricultural reclamation system was analyzed from perspective of total amount and structure，and it was found that there was a high synchronization and consistency between fixed assets investment and GDP.Based on the time series data of the Statistical Yearbook of Agricultural Reclamation of China from 2004 to 2017，a simple linear model and a Cobb-Douglas production function model containing only capital were used to empirically test correlation between fixed asset investment and economic growth.Results showed that there was a significant correlation between fixed assets investment and economic growth.For every unit of fixed asset investment increased，the GDP would increase by 1.292 units.Main factor promoting economic growth of agricultural reclamation system was capital factor represented by fixed asset investment，whose capital contribution rate to economic growth was 67.9%.

Problems，Paths and Countermeasures of Promoting Reform of Property Right System of Xinjiang Rural Collective Economic Organizations

WANG Keqiang, LIU Weizhong

2020, 10(11): 115-120.

Abstract(266) [PDF 563KB](40)

Abstract:
Based on field investigation of Xinjiang Changji Hui Autonomous Prefecture，Shawan county and Aksu prefecture of Tacheng district，practice and exploration of Xinjiang rural collective property rights system reform were expounded from five aspects：stage，operation process，equity dividend method，reform path and reform effect.Combined with different practices of rural collective property rights system reform in southern and Northern Xinjiang，three equity dividend modes，namely asset dividend，asset expansion and asset protection，and three paths of self-development，government guidance and mixed development，were analyzed and concluded.Problems that need to be solved were found out.Countermeasures were put forward to provide valuable experience for reform of rural collective property rights system in northwest minority areas.

Empirical Analysis on Impact of Farmers′ Information Cognition on Transformation of Modern Agricultural Behavior：Taking Yunnan Province as an Example

XIAO Wenlong, LAN Qing, CHEN Yubao, ZHANG Wenjie, ZHAO Yongchao

2020, 10(11): 121-124.

Abstract(258) [PDF 335KB](37)

Abstract:
Taking Yunnan province as an example，using SPSS 21.0 and AOMS 17.0，through structural equation model，based on planning behavior theory of psychology，impact model of farmers′ information cognition on transformation of modern agriculture was constructed.According to statistical results，behavioral attitude（AB），subjective norm（SN）and perceptual behavior control（PBC）of three dimensions of farmers′ information cognition had significant positive effects on agricultural modernization，and behavioral attitude（AB）as an intermediary variable was also affected by main factors.Influence of SN and PBC was different.Therefore，identity of farmers should be paid more attention，and their knowledge and technology capabilities should be improved，vital interests of modern information agriculture to farmers should be paid attention.Farmers were encouraged to rely on their own autonomy to promote transformation of information-based modern agriculture.

Development Path of Chinese Herbal Medicine Industry in Dingxi City

WEI Dong, ZHANG Aining

2020, 10(11): 125-128.

Abstract(208) [PDF 250KB](5)

Abstract:
Chinese herbal medicine is also known as herbal medicine，and Chinese medicine culture also has very deep historical details.With rapid development of our country′ s economy and society in recent years，people′ s quality of life has been continuously improved，and more attention has been paid to their own health，while Chinese medicine also plays a very important role in treating diseases and health care.Chinese medicinal materials industry is also growing.Chinese medicinal materials industry is one of three leading industries in Dingxi in recent years.Current situation and existing problems of Chinese medicinal materials industry in Dingxi were analyzed.Development path of Chinese herbal medicine industry in Dingxi was discussed，which was of great significance to promote development level of Chinese herbal medicine industry in Dingxi，to promote local economic and social development，and to increase income of local people.

2020 Vol. 10, No. 11

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