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开花24天内,3个试验品种(TM-1、IM、Lil)的单铃子棉重、壳重处于同步快速增重期。由于子棉增重快于铃壳增重,24天内,单铃子棉经济系数的增加率及铃壳下降率均为42.39～51.9%。开花后25～45天,子棉继续增重,壳重下降的反差使铃壳率继续下降16.6～19.3%。这与铃壳内贮藏养分转运子棉有关。TM-1棉铃内养分分配到纤维较多,Lil 较少,IM 居中。纤维长度或重量取决于快速伸长(或增重)期的长短和日伸(增)率的高低。纤维伸长与增重几乎同步进行。当纤维伸长完成之前,纤维已进入快速增重期。至纤维定长时,纤维重已占最后重的50～60%以上。
Within 24 days of flowering, boll weight and shell weight of three test varieties (TM-1, IM, Lil) were in synchronous rapid weight gain period. As the weight gain of cotton boll was faster than that of boll shell, the increase rate of economic coefficient of boll cotton boll and boll reduction rate were both 42.39 ~ 51.9% within 24 days. From 25 to 45 days after flowering, the seed cotton continued to gain weight, and the contrast of the shell weight decreased the shell rate continued to drop by 16.6-19.3%. This is related to the storage of nutrients in the bell shell to transport cotton seedlings. TM-1 cotton bolls nutrient distribution to more fiber, Lil less, IM center. The length or weight of the fiber depends on the length of the rapid elongation (or weight gain) period and the daily elongation (elongation). Fiber elongation and weight gain almost simultaneously. The fiber has entered a rapid weight gain period before the fiber elongation is completed. To the fiber length, fiber weight has accounted for the final weight of 50 to 60%.