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选择了赣、苏、川等省共16个剖面25个不同侵蚀土壤的样品,用压力板测定仪进行分析,结果得出土壤在不同吸持力下所吸持土壤水分的重量和百分数.质地较轻的土壤内吸持水分的百分含量较小,失水速度较快;容重大的土壤,失水速度较慢;0.06～15巴吸持力之间为土壤有效水分,失水百分数与容重呈负相关;大孔隙量增加,吸水量相应减少.吸持力>2.5～15毫巴,相应的土壤孔隙孔径1200～0.2μm,由此可算出耕层土壤小孔隙孔径的比例.本文还测定了土壤通气系数(k),在田间持水量条件下,k值范围20—50时,能保证旱作物生长.对土壤进行上述物理性状测定,可以对侵蚀土壤采取有效的调控措施,以保植物生长.
A total of 25 samples with different eroded soil samples from 16 sections in Jiangxi, Jiangsu and Sichuan provinces were selected and analyzed with a pressure plate analyzer to obtain the weight and percentage of soil moisture absorbed by the soil under different adsorption forces. Lighter soil moisture absorption percentage of small, faster water loss; capacity of large soil, slow water loss; 0.06 ~ 15 bar between the soil holding capacity for effective moisture, the percentage of water loss and The bulk density was negatively correlated, the amount of macropores increased, and the amount of water absorption decreased correspondingly.The adsorption capacity was 2.5-15 mbar and the corresponding soil pore size was 1200-0.2 μm, which could be used to calculate the proportion of soil pore size in topsoil. The soil aeration coefficient (k) was measured to ensure the growth of dry crops under the condition of k in the range of 20-50 under the condition of field water holding capacity.It is effective to control soil erosion by measuring the above physical properties, Plant growth.