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本文于１９８８～１９９０年采用五因素五水平二次正交旋转回归设计的方法，对影响淮北地区麦套棉花产量和效益的人为可控因子中的施纯Ｎ量、Ｐ２Ｏ５量、Ｋ２Ｏ量、密度、化控５个因子进行了研究。通过建立的数学模型，明确了对产量和效益影响的主次顺序为：密度＞氮肥＞钾肥＞化控＞磷肥，并得到了达到最高产量和效益的最佳组合方案：每公顷施纯Ｎ１８０～１９５ｋｇ，Ｐ２Ｏ５３０～６０ｋｇ，Ｋ２Ｏ１５０～１６５ｋｇ，移栽密度５．２５万～５．５１万株／ｈｍ２，缩节安用量３０～４５ｇ，于盛蕾期、盛花期或封顶时化调２～３次。为生产上制定技术措施提供了科学依据。
This article from 1988 to 1990 using five factors and five levels of quadratic orthogonal rotation regression design methods to affect the yield and benefits of cotton in Huaibei cotton artificially controlled factors in the application of pure N, P2O5, K2O, density , Chemical control of five factors were studied. According to the established mathematical model, the order of major and minor effects on yield and benefit was clarified: density> nitrogen fertilizer> potash fertilizer> chemical control> phosphate fertilizer, and the best combination to achieve the highest yield and benefit was obtained: N180 ~ 195kg, P2O530 ~ 60kg, K2O150 ~ 165kg, transplanting density 52500 ~ 55100 plants / hm2, reducing the dosage of 30 ~ 45g, in the Shenglei stage, full bloom or cap when the tone 2 to 3 times . For the production of technical measures to provide a scientific basis.