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氮素化肥表层撒施损失很大。为了摸索科学用肥方法,我站从1974年以来。连续在早、晚稻上进行球肥深施试验,用等量化肥,分几种不同的施肥方法进行对比,结果一致证明,球肥深施比表层撤施及其他施用方法都要增产。据试验,早稻先锋一号品种,亩施碳铵30斤,不同施肥方法的定量结果是:表层撒
Nitrogen fertilizer surface spreading loss. In order to explore the scientific method of using fertilizer, I stood since 1974. Continuous application of early and late rice ball deep fertilizer test, with the same amount of fertilizer, divided into several different fertilization methods for comparison, the results show that the ball deep application of fertilizer than the surface layer and other methods of application should be increased. According to the test, a pioneer of early rice varieties, ammonium bicarbonate 30 kg, the quantitative results of different fertilization methods are: