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中文摘要：
通过棉花膜下滴灌大田试验,研究了灌水频率对土壤水盐运移和分布规律的影响,并对不同灌水频率的保墒、控盐、增产效果进行了评价。试验结果表明：在灌溉水质为淡水且定额为375 mm时,低频（10 d）和适频（7 d）灌溉下膜内0~60 cm土层的含水量适宜,低频灌溉的含水量最高,而高频（3 d）灌溉下各土层在花铃期处于轻度干旱状态。低频灌溉对膜内及背行的综合控盐效果略优于高频,远优于适频。灌水频率对棉花产量有显著影响,高频灌溉的棉花产量最高。
英文摘要：
A cotton field experiment under mulched drip irrigation was carried out in order to study the effects of different irrigation frequency on soil water-salt transport and distribution,and to evaluate different irrigation frequencies＇ efficiency in preserving moisture,controlling soil salinization,and increasing cotton yield.The results show that the soil moisture contents are not the same under different irrigation frequencies with fresh water at 375 mm,namely,low-frequent irrigation（10 days） and middle-frequent irrigation（7 days） can all make the moisture suitable in soil layers of 0～60 cm,and the moisture content is the highest under low-frequent irrigation.Contrarily,the soil layers are in light-degree drought condition during flowering and boll-forming stage under high-frequent irrigation（3 days）.Based on comprehensive analysis on salinization or desalinization status of root zone under film and un-mulched soil,low-frequent irrigation is slightly better than high-frequent irrigation and much better than middle-frequent irrigation.The irrigation frequency has significant influence on cotton yield,and the highest yield can be obtained under high-frequent irrigation.
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