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以一年三熟为主要耕作形式的上海郊区,在棉花生产上采用提高密度、控制株型的高密度栽培,是随着耕作制度的不断改革,反映在棉花栽培上的一项革新。三年来,广大贫下中农和科研人员相结合,经多点试验的结果,认为是一个有利提高棉田机械化和有利在原有水平上提高产量的一条途径。密度在万株以上的棉田,控制株型是一项十分关键的措施。我们的试验是应用植物生长调节剂矮壮素作为矮化棉株的手段。合理使用矮壮素不仅能防止疯长,而且能促进根系生长,提高光合同化率,改变光合产物在棉株体内各器官的分配比例,起到增铃、增重的作用。
The suburbs of Shanghai, which take three crops a year as their main form of farming, adopt high-density cultivation to increase their density and plant type in their cotton production. This is an innovation reflected in the cultivation of cotton as the farming system continues to be reformulated. In the past three years, the vast majority of poor and middle-level peasants and their scientific research personnel have combined and the results of multi-point experiments are considered as a way to increase the mechanization of cotton fields and increase the output at the original level. Density of cotton in more than 10,000 strains, plant type control is a very crucial measure. Our experiment was to use the plant growth regulator CCC as a means of dwarfing cotton plants. Appropriate use of CCC can not only prevent long insanity, but also promote root growth, increase photosynthetic assimilation rate, change photosynthetic products in the cotton plant organs distribution ratio, play the role of bolls, weight gain.