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１９９１～１９９５年在人工控制水分的条件下，研究不同生育阶段土壤水分对棉花蕾铃脱落与纤维品质的影响。研究发现，土壤水分不足或过大，均易造成蕾铃脱落增加和品质下降。有利于增蕾保铃和提高纤维品质的土壤湿度，约相当于田间持水量的５５％～７５％。不同生育阶段的棉花蕾铃脱落率和对水分的敏感系数不同。蕾铃脱落对水分的敏感系数以开花盛期－吐絮期最大，蕾期相对较小。脱落率以开花盛期－吐絮期最大，开花－开花盛期次之，吐絮期居第三位，现蕾－开花期最小。这些阶段有利于增蕾保铃的土壤湿度分别为６０％、６６％、６４％和６３％。有利于增加纤维长度、改善纤维细度和增加纤维强度的土壤相对湿度为６５％～７５％。
From 1991 to 1995, under artificial control of water conditions, the effects of soil moisture at different growth stages on the shedding of cotton buds and the fiber quality were studied. The study found that inadequate or excessive soil moisture, are likely to cause increased loss of buds and quality decline. Soil moisture, which is conducive to increasing bolls and improving fiber quality, is about 55% -75% of the field capacity. Different stages of cotton bud bolting rate and sensitivity to water is different. The sensitive coefficient of water loss to the buds of bollworm blooms - the boll opening period is the largest and bud stage is relatively small. The rate of flowering at flowering stage - the largest bolting stage, flowering - the flowering stage, followed by boll opening stage, budding - the smallest flowering stage. Soil moisture at these stages, which is conducive to boll bolting, is 60%, 66%, 64% and 63% respectively. The soil relative humidity, which is beneficial for increasing the fiber length, improving the fiber fineness and increasing the fiber strength, is 65% -75%.