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1·合理施肥的原则一是要注意有机肥和无机肥并重。二是注意氮、磷、钾肥配合施用。氮、磷、钾配合使用,不但能满足玉米生长发育的需要,而且也能提高单一元素的利用率。一般氮、磷、钾三种肥料配合使用,各自的利用率分别为27·7%、17·6%和38·8%,比仅两种肥料配合时,平均利用
1 · The principle of rational fertilization First, pay attention to both organic and inorganic fertilizers. Second, pay attention to nitrogen, phosphorus and potassium fertilizer with the application. Nitrogen, phosphorus and potassium with the use of not only meet the needs of corn growth and development, but also can improve the utilization of single elements. The general use of three kinds of nitrogen, phosphorus and potassium fertilizers, their respective utilization rates were 27.7%, 17.6% and 38.8%, respectively, compared with only two kinds of fertilizers, the average utilization