轮式作业机械对农田土壤压实的模拟试验研究

Simulation Test of Soil Compaction Causing by Wheeled Operating Machinery

为了简化农田作业机械对土壤压实的试验过程,对轮式作业机械对土壤参数的压实影响总的变化趋势进行分析。用简单的试验装置对轮式作业机械对土壤的压实进行模拟试验,模拟试验测取了不同接地比压,不同通过次数下土壤含水率、容重和坚实度3项指标的变化。试验表明:接地比压和通过次数对当时土壤的含水率的影响不大;接地比压对土壤坚实度和表层土壤容重的影响较大;土壤被压实1次和2次时土壤的坚实度和容重有较大的影响;接地比压和土壤压实次数对深层土壤的容重影响不大。

To simplify the testing process soil compaction caused by agricultural machinery,mechanical field operations on of the wheel operating machinery on the general trend of soil parameters caused by wheeled model agricultural machinery has been analyzed.Simulating soil compaction caused by wheeled operating machinery using simple experimental facilities,then measuring the change of soil water content,bulk density of soil and soil hardness under different ground pressures and different pass count.The result shows that ground pressure and pass count have little effect on soil water content;ground pressure has greater impact on soil hardness of surface layer and bulk density of soil;compaction once or twice has greater influence on soil hardness and bulk density of soil;ground pressure and pass count have little effect on the bulk density of deep soil.