不同土壤水势阈值滴灌对中国西北地区棉花土壤盐度、种子棉产量和水生产力的影响
肖超，季庆元，张福仓*，李轶*，范俊亮*，侯祥浩，颜富来， 刘晓强，龚凯远
摘要：
在中国西北地区进行了一个灌溉试验来研究不同土壤水势阈值下的滴灌对棉花产量、水生产力和土壤盐度的影响。使用了四个处理：-20 kPa、-30 kPa、-40 kPa和-50 kPa作为土壤水势阈值，并比较它们之间的差异。结果表明，随着土壤水势阈值的降低，土壤含盐量逐渐增加。然而，在所有处理中，最高的产量和最高的水生产力都出现在-30 kPa处理中。与此同时，在-50 kPa处理中棉花的种子棉产量显著降低。
关键词：滴灌； 棉花； 土壤含盐量； 水生产力； 种子棉
Abstract:
An irrigation experiment was conducted in northwest China to study the effects of drip irrigation with different soil water potential thresholds on cotton yield, water productivity and soil salinity. Four treatments were used: -20 kPa, -30 kPa, -40 kPa and -50 kPa as soil water potential thresholds, and the differences among them were compared. The results showed that as the soil water potential threshold decreased, the soil salt content gradually increased. However, in all treatments, the highest yield and highest water productivity occurred in the -30 kPa treatment. Meanwhile, the seed cotton yield of cotton was significantly reduced in the -50 kPa treatment.
Keywords: Drip irrigation; Cotton; Soil salinity; Water productivity; Seed cotton
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