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氮、磷、钾是水稻生长发育所必需的三大元素.适量施用氮磷钾化肥,可提高化肥利用率和经济效益,是保证作物高产稳产的一项重要措施.通过1981～1983年三年早晚稻氮磷钾定位试验,初步摸索出施用不同化肥品种和同有机肥配施的增产效益及对土壤养分变化等,为经济合理施肥提供参考.
Nitrogen, phosphorus and potassium are the three major elements necessary for the growth and development of rice.Appropriate amount of nitrogen, phosphorus and potassium fertilizers can increase fertilizer utilization rate and economic benefits, which is an important measure to ensure the high and stable crop yield.Through the three years from 1981 to 1983 The experiment of NPK locating in early and late rice explores the yield-increasing benefits of applying different chemical fertilizer varieties and the same organic manure together with the changes of soil nutrients in order to provide reference for economic and rational fertilization.