坡耕地局部打破犁底层对水分入渗的影响

针对我国东北半干旱地区坡耕地的耕作层逐年变薄,结构坚硬、紧密的犁底层上移变厚,造成土壤透水、通气性极差,土壤径流、泥沙侵蚀严重,严重影响水分的入渗。利用同心环有压入渗试验及野外模拟降雨试验,研究了在垄作区田的坡耕地中,根据区田土垱之间打破犁底层范围的不同,来分析坡耕地的犁底层对水分入渗的影响。结果表明局部打破犁底层后水分稳定入渗率提高,产流时间延长,径流和泥沙明显减少。

Influence of Plough Pan on Broke Partially Slope Farmland to Moisture Content Infiltration

In view of our country northeast half arid area slope farming's plow layer thins year by year.The structure hard and the close plough pan uppers and thickens.Causing the soil water percolation,the ventilation to miss extremely,the soil runoff and the silt corrosion are serious.Moisture content infiltration Influenced seriously.Has using the concentric ring pressed in infiltrates experimental and the open country simulation rainfall experiment.Having studied slope farming in the tied ridging culture,between breaks the plow sole scope according to the pitting difference field earth.The plough pan of slope farming to the moisture content infiltration influencing has analyzed.The result indicated that the plow sole broke partially.The moisture content stable infiltration rate enhances,producing the class time expands,the runoff and the silt reduce obviously.