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为探讨在高投入条件下不同化学纯氮与相同有机肥用量不同施用方法对棉花生长发育和产量高低的影响，并达到超高产的要求，根据旱粮棉区的特点，设计了化学纯氮（Ａ）和饼肥（Ｂ）两因素三水平的试验。具体为化学纯氮（Ａ）分三个水平：（Ａ１）３００ｋｇ·ｈｍ－２，（Ａ２）
In order to explore the effect of different chemical nitrogen and the same amount of organic manure on the growth and yield of cotton under high input conditions and achieve the requirements of super high yield, A) and cake fertilizer (B) two levels of three levels of test. Specifically for chemical pure nitrogen (A) divided into three levels: (A1) 300kg · hm-2, (A2)