土壤物理特性对胡萝卜机械拔取过程的影响
Effect of Soil Physical Properties on Mechanical Pulling Process of Carrot
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摘要: 胡萝卜是我国主要的蔬菜品种，分析胡萝卜拔取规律，可以为胡萝卜拔取式联合收获机械的研制提供支持。该文采用自主研制的数控式蔬菜拔取力测量试验台，对收获期典型品种胡萝卜进行拔取试验，统计试验数据并进行回归分析，研究预测土壤物性参数（土壤含水率、硬度及容重）与胡萝卜拔取力及拔取动态过程之间的关系。研究发现土壤含水率在20%~30%时，随着土壤含水率的提高、土壤硬度的降低和土壤容重的降低，胡萝卜的机械拔取力值会降低，但土壤对胡萝卜的拔取阻碍时间延长。Abstract: Carrot is an important vegetable in our country.The rule on carrot pulling was analyzed to support evelopment of carrot pulling combine harvester.Pulling test on typical carrot of harvest was carried out by the self-developed numerical control test bench of vegetable pulling force.Test data were analyzed using regression to study predicts relationship between soil physical parameters（soil moisture content, hardness, bulk density）and carrot pulling process/force.Results showed that soil hardness and bulk density will decrease with increase of soil moisture when soil moisture was between 20% and 30%.Also mechanical pulling force of carrot decreases,and resistance time of soil on carrot pulling prolongs with increase of soil moisture.
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Keywords:
- pulling force /
- carrot /
- soil moisture content /
- soil hardness /
- soil desity
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