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以常规(单秆)移栽棉为对照,研究双秆棉产量品质优势及其形成机理。两年试验结果表明:在大田生长期缩减40天左右的情况下,双秆棉子棉产量2002年较CK增加12.72%,2004年较CKI和CKII分别增加17.04%、20.99%,均达显著水平;2004年双秆棉优质铃率较CKI和CKII分别高出21.46、2.75个百分点,据灰色系统关联度分析法评价,双秆棉总体纤维品质优于CKI和CKII,具有显著的产量品质优势,突出表现为开花结铃盛期与最佳光热季节同步期内的成铃的聚载效应和成铃的时空效应。双秆棉在最佳光热季节成铃强度达3.65万个·(hm2·d)1的同步期为24天,同步期间成铃强度比对照高1万个·(hm2·d)1左右,伏桃、早秋桃较对照多25.63万～36.00万个·(hm2·d)1,中下部内围铃较对照多17万个·hm2以上。
Taking the conventional (single stalk) transplanted cotton as control, the yield and quality of double stalk cotton and its formation mechanism were studied. The results of two years showed that the cotton stalk yield of double-stalk cotton seed cotton increased by 12.72% compared with CK in the field growth period of about 40 days, and increased by 17.04% and 20.99% respectively compared with CKI and CKII in 2004, reaching significant levels . Compared with CKI and CKII, the highest boll yield of double-stalk cotton was 21.46 and 2.75 percentage points higher than that of CKI and CKII respectively. According to the gray system correlation analysis, the overall fiber quality of double-stalk cotton was superior to CKI and CKII, The results show that the boll-forming effect and the space-time effect of boll-forming are the same during the flowering period and the optimal photothermal season. The bolting intensity of double-stalk cotton reached 36,500 hm2 · d for 24 days in the optimum photothermal season, and the boll intensity was about 10,000 hm2 · d -1 in the synchronization period, The number of peach and early autumn peaches was 256,300 ~ 360,000 · (hm2 · d) 1 in the early autumn, while the number of the inner and lower central fences was more than 170,000 · hm2 in comparison with the control.