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在夏播棉花生长期偏干旱年份,采用裂区设计方法,对21个夏播棉花品种(系)进行自然不灌溉和合理灌溉条件下的比较试验研究。结果表明:合理灌溉比不灌溉,21个材料的平均单株成铃数多3.30个,平均单铃重增加0.47 g,平均衣分高2.68个百分点,籽棉产量增加111.38%,皮棉产量增加126.94%。同时,与中棉所50相比较,自然无灌溉条件下,有11个品种增产,灌溉条件下有5个品种增产,有9个品种两种条件下都减产。中061930、中915、中425、中619、中杂2022和中001101耐干旱能力较强,在不灌溉条件下比对照增产,而在灌溉条件下却不增产。
In the summer drought-sowing cotton growing season, using the split-plot design method, 21 summer sowing cotton varieties (lines) under the condition of natural irrigated and irrigated under reasonable experimental conditions. The results showed that the average number of bolls in each of the 21 materials increased by 3.47 g, the average boll weight increased 2.68 percentage points, the seed cotton yield increased 111.38% and the lint yield increased 126.94% . At the same time, compared with CKR50, 11 varieties increased yield under natural irrigating conditions and 5 varieties under irrigated conditions increased yield, and 9 varieties both reduced yield under both conditions. Zhong 06930, Zhong 425, Zhong 619, Zhongza 2022 and Zhong 001101 were better tolerant to drought than non-irrigated, but not irrigated.