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针对黑龙港流域气候特点和生产条件,为解决棉花生产管理繁、用工多、效率低的矛盾。促进我省棉花生产的发展,“七五”期间,我们采用多元回归正交旋转设计,对综合技术措施进行了系统的定量研究,筛选出棉花高产、简化栽培技术最优组合。1988—1989年度在盐山、吴桥大面积示范,亩产皮棉可稳定到75公斤,高产地块达129公斤,减少田间用工30—50％,亩增经济效益百元以上。
In view of the climate characteristics and production conditions of the Heilongjiang River Basin, in order to solve the contradiction between the complicated and labor-intensive management of cotton production, the large amount of labor and the low efficiency, During the “Seventh Five-Year Plan” period, we adopted the multiple regression orthogonal rotation design to systematically and quantitatively study the comprehensive technical measures and screened out the optimal combination of high-yielding cotton and simplified planting techniques. From 1988 to 1989, a large area demonstration was carried out in Yanshan and Wuqiao. The lint yield per mu could be stabilized to 75 kilograms and the high-yield plots reached 129 kilograms, reducing the labor cost in the field by 30-50% and increasing the economic benefits by more than one hundred yuan.