论文部分内容阅读
目前,我国施用的化肥种类主要有氮肥、磷肥、钾肥三种,其中氮肥占化肥施用量的百分之六十一点五。农户施化肥大都是在雨后人工播撒,当氮肥被施入土壤后,除部分被作物吸收以外！还有相当一部分以气态氨的形式挥发掉。据有关部门测算,通过氨挥发损失的氮在旱地超过施氨总量的百分之二十六,在水田超过百分之四十。因此,有效的抑制氨挥发是节肥的重要途径,
At present, the main types of fertilizers used in our country are nitrogenous fertilizer, phosphate fertilizer and potassium fertilizer, of which nitrogenous fertilizer accounts for 61.5% of the total amount of chemical fertilizer applied. Farmers fertilizers are mostly artificial sowing after the rain, when the nitrogen fertilizer is applied to the soil, in addition to some absorbed by the crop! There is a considerable part of volatile ammonia in the form of volatilization. According to the estimates of the departments concerned, the nitrogen lost through ammonia volatilization exceeded the 26% of the total amount of ammonia in dry land and over 40% in paddy fields. Therefore, the effective inhibition of ammonia volatilization is an important way to fatter,