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.