黑龙江省黑土、草甸土耕地土壤与荒地土壤水分入渗试验研究

采用双环法对黑龙江省的黑土和草甸土两种土壤,分耕地和荒地两种利用类型进行试验研究。相关分析结果显示,土壤稳定入渗速率与非毛管孔隙度、土壤容重都表现出极显著的相关性,与初始含水量表现出显著相关性。稳定入渗速率与土壤容重呈负相关,与非毛管孔隙度和土壤初始含水量呈正相关。选择初始入渗速率、稳定入渗速率、达到稳定入渗所用时间和至稳渗的入渗量四项指标进行灰色关联评价。结果表明,两种土壤在0~20 cm层荒地的入渗性能明显优于耕地,而在20～40 cm层黑土耕地的相对入渗性能有所好转,但总体上看,荒地仍然优于耕地。40~60 cm层耕地和荒地间并无明显差异。由此可见长年耕作对耕层土壤的水分参数造成了不良影响。

Study on permeability of black soils and meadow soils in cultivated soils and wasteland soils in Heilongjiang Province

By using double-rings method researched cultivated land and wasteland of the black soil and meadow soil in Heilongjiang Province.The correlation analysis results showed that the correlation between non-capillary porosity and soil bulk density with stable infiltration rate was high significant and the correlation between initial moisture content with stable infiltration rate was significant;the correlation between soil bulk density with stable infiltration rate was negative and the correlation between soil bulk density with stable infiltration rate was negative and the correlation between non-capillary porosity and initial moisture content with stable infiltration rate was positive.Based on the initial infiltration rate,stable infiltration rate,infiltration time and cumulative infiltration,the results with grey relational grade analysis showed that infiltration of wasteland was superior to it of farmland in 0-20 cm layer,and the relative performance of infiltration of 20-40 cm layer of black soil of cultivated land has improved,while it was not significant difference between wasteland and farmland in the 40 cm below.Therefone,this showed that many years of cultivation resulted in adverse effects on soil moisture parameters of topsoil.