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江苏淮北地区麦套棉与纯作棉相比,各生育阶段的生育进程,干物质积累和蕾铃增长速度均表现为前期略慢,中期较快,后期较强。麦套棉高产田叶面积指数为:苗期0.03—0.05;现蕾期0.3—0.5;开花期1.2—1.4;盛花期2.4以上;花铃期3.5以上,保持20—25天;吐絮期2—2.5。结铃动态为7月10日前后花、铃数开始平缓增长;7月20日至8月15日结铃强度呈直线上升;8月下旬至9月上旬结铃强度平缓增长。促早发,迅速扩展叶面积,增加干物质积累,适当调控株型,使最佳结铃期与光能富照期同步,提高结铃强度和经济系数,是麦套棉高产优质高效的关键。
Compared with pure cotton, the cotton growth rate, dry matter accumulation and boll growth rate at all stages of growth in Huaibei area of Jiangsu Province were slightly slower in the early period, faster in the middle period and stronger in the latter period. The area index of high yield wheat field cotton was 0.03-0.05 in seedling stage, 0.3-0.5 in budding stage, 1.2-1.4 in flowering stage, 2.4 in full flowering stage, 3.5 in flowering stage and maintained for 20-25 days, 2.5. The dynamic of ringing bell was around July 10, and the number of bell began to increase gently. The ringing intensity of bell ring increased linearly from July 20 to August 15, and the ringing intensity increased slowly from late August to early September. It is the key to high-yield, high-quality and high-efficiency wheat germplasm to promote early development, rapid expansion of leaf area, increase of dry matter accumulation, proper regulation of plant type, synchronization of the optimal period of boll and photo-rich period, increase of ringing intensity and economic coefficient .