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针对粗砂潮土有效养分含量低且不协调,漏水漏肥,供肥能力低等特点,研究了小麦氮磷化肥的最佳用量,根据氮磷的供需矛盾和经济施肥原则,提出了氮磷适宜用量的调控范围和方法。并研究了小麦氮素化肥的施用期结构,提出在施适量有机肥和磷素化肥的基础上,底肥少施或不施氮化肥,以越冬返青或孕穗期一次追施氮肥,或返青期追施2/3,孕穗期追施1/3氮肥的施用原则。
According to the characteristics of low and uncoordinated active nutrient content of coarse sandy soils, the optimum dosage of nitrogen and phosphorus fertilizers for wheat is studied. Based on the contradiction between supply and demand of nitrogen and phosphorus and the principle of economic fertilization, nitrogen and phosphorus The appropriate amount of regulation and control methods and methods. Based on the application of organic fertilizers and phosphorus fertilizers, it is suggested that nitrogenous fertilizer should be topdressing or returning to green at the time of returning to green or booting through winter, Shi 2/3, booting 1/3 nitrogen fertilizer application principles.