尿素是农用固体化肥中含氮量最高的一种,属中性肥料,肥效好,施用和贮运方便。长期使用对土壤无破坏作用。如果施用不当氮素损失较大,施后增产不显著。正确施用方法如下: 一、要深施尿素施入土中需4～6天转化后才能被作物吸收。如果把尿素施在地表,易造成氮素挥发淋失,降低肥效。因此,尿素都要以深 Urea is the highest content of nitrogen in agricultural solid fertilizers, which is a neutral fertilizer with good fertilizer effect and convenient application, storage and transportation. Long-term use of the soil without damaging effect. If the improper application of nitrogen loss is greater, the yield increase after the application is not significant. Correct application methods are as follows: First, to deep urea applied to the soil need 4 to 6 days after conversion to be absorbed by crops. If the urea applied to the surface, easily lead to volatile nitrogen leaching, reduce fertilizer. Therefore, urea should be deep