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据统计我国水田氮肥的利用率大约在35～60%左右,旱田氮肥的利用率约为40～75%,平均50%左右。由此可见,施入土壤中的氮肥约有一半左右被损失掉了,要提高氮肥的利用率,就必须对氮肥进行合理的分配与施用。一、氮肥的合理分配 1.根据土壤条件土壤条件对氮肥品种的选择和分配有密切关系。一般碱性土
According to statistics, the utilization rate of nitrogen fertilizer in paddy fields in China is about 35-60%, and the utilization rate of nitrogenous fertilizer in dry land areas is about 40-75%, averaging about 50%. Thus, about half of the nitrogen fertilizer applied to the soil is lost. To improve the utilization of nitrogen fertilizer, nitrogen fertilizer must be rationally distributed and applied. First, the rational distribution of nitrogen 1. Soil conditions under different soil conditions on the selection and distribution of nitrogen species are closely related. General alkaline soil