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旱地棉生育期间随着灌水量的增加平均单铃重、衣分率及霜前花率依次下降。生育期不灌水,伏桃增长快,而蕾铃脱落率高,蕾、幼铃再生数量少,早衰;生育期灌水80m~3,伏桃增长慢,秋桃增长快,但8月15日后蕾铃脱落率高,生物产量高但经济系数小,贪青晚熟;生育期灌水45m~3,伏桃、秋桃比例适宜,生物产量高,经济产量高。
During the growing period of upland cotton, the average single boll weight, the percentage of lint percentage and the rate of frost before flowering decreased with the increase of irrigation amount. The growth period is not irrigation, the rapid growth of V, and the high rate of falling buds, buds, young bell regeneration less, premature aging; growth period of irrigation 80m ~ 3, walnut slow growth, autumn peach grow fast, but on August 15 after the bud The boll loss rate is high, the biological yield is high, but the economic coefficient is small, greedy and late-maturing. The irrigation period is 45m ~ 3, suitable for peach and autumn peach, with high biological yield and high economic yield.