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1985—1987年试验在扬州、响水等8个点上进行,亩植2000、3000、4000、5000株,生育类型分早、中、晚三期,岱字棉15号,4个区组。试验明确了高产优质棉花栽培应系统调节苗、蕾、花、铃、絮等时期的生育进程和强度,使棉花高能期与该棉区常年高能季节及时同步。适宜密度为3000-4000株/亩,棉株以6月下旬达盛蕾期,现蕾后单株平均3天左右出一台果枝,8月中旬亩最高果节量宜在25万左右,最大叶面积指数4,群体高度的上升与果节量增长相应发展。
The experiments of 1985-1987 were carried out at 8 points in Yangzhou and Xiangshui. There were 2000, 3000, 4000 and 5000 mu of plantations per mu. The types of fertility were divided into three phases of early, middle and late nights, Dai-Zi Cotton 15 and 4 blocks. It is clear that high-yielding and high-quality cotton cultivation should systematically regulate the growth and intensity of seedling, bud, flower, bell and flocculation, so that the high-energy period of cotton and the perennial high-energy season of the cotton area synchronize with each other. Appropriate density of 3000-4000 plants / mu, cotton plants in late June reached Shenglei bud, buds an average of about 3 days after the emergence of a fruiting branch, in mid-August acres of the highest fruit yield should be about 250,000, the largest Leaf area index 4, the height of the population increased with the growth of fruit section accordingly.