施肥对黑土耕层土壤水分下渗量的影响

应用无张力托盘承接土壤下渗水,研究了施肥对黑土耕层土壤水分下渗量的影响,结果表明:施用氮能够减少土壤下渗水量,施用磷增加了土壤的下渗水总量,氮磷相比较,氮对下渗水量起决定作用。氮磷肥对下渗水累积量存在交互作用,随着施氮水平的增加,磷对土壤下渗水量的增加作用更加明显。随着施磷量的增加,氮对土壤下渗水累积量的作用减弱。施用有机物料后氮对下渗水累积量的减小幅度变小,而磷对土壤下渗水累积量的增加幅度变大。

The Effect of Fertilization on the Infiltrative Quantity of Moisture of Arable Layers of Black Soil

In order to study the effect of fertilization on the infiltrative quantity of moisture of arable layers of black soil,we use the Tray Without Tension to contain infiltrative water of soil.The results show that the application of nitrogen can reduce the infiltrative quantity of moisture of soil,and the application of phosphorus can increase the infiltrative quantity of moisture of soil.The comparison between nitrogen and phosphorus show that the key role of the infiltrative quantity of moisture is nitrogen.There is an interaction between the application of nitrogen and phosphorus.With the quantity of nitrogen increasing,phosphorus is more obviously improve the infiltrative quantity of moisture of soil.With the quantity of phosphorus increasing,the function of nitrogen impact on the infiltrative quantity of moisture of soil is reduced.After using the Organic Matters,the reduce scope of the effect of nitrogen on the infiltrative quantity of moisture is reduced.But the increase scope of the effect of phosphorus on the infiltrative quantity of moisture is increased.