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为了提高氮肥的经济效益,省玉米高稳优低肥料研究组,在施磷的基础上,进行不同氮量试验,以氮肥增产效应模式,确定不同土壤氮肥的经济用量,为夏玉米合理施肥提供科学依据。一、试验材料和方法试验处理为①CK_1不施肥;
In order to improve the economic efficiency of nitrogen fertilizer, the research group of high-stable high and low-fertility corn had different nitrogen levels on the basis of phosphorus application and the economical effect of nitrogen fertilizer in different soil nitrogen fertilization to determine the reasonable fertilization for summer maize Scientific basis. First, the test materials and methods of test treatment ① CK1 no fertilization;