中文摘要：

在新疆巴州水管处重点灌溉试验站进行了不同微咸水灌水量（分别为300 mm,337 mm,375 mm和412.5 mm）的棉田膜下滴灌试验,研究了不同微咸水灌水量对棉田不同水平位置和垂直深度处的土壤水盐运移影响,分析了在不同灌水量下棉花生长及产量的变化,以寻求适宜棉花生长的膜下滴灌灌溉制度.结果表明：在棉花生育期内,土壤0-40 cm深度宽行土壤含水量随灌水量变化波动较小,窄行及膜间土壤含水量随灌水量变化波动较大,膜间土壤含水量较宽行窄行要小;棉花生育期内滴头下方0-20 cm的土壤含盐量均有减小,20-40 cm土层的土壤含盐量随灌水的波动较大,灌水量较小的土壤含盐量较大,375mm灌水量对棉花根区土壤盐分淋洗的效果最好;随着灌水量的增加,宽行0 40 cm土壤盐分均有一定程度的累积,窄行土壤均表现为脱盐,而膜间土壤由脱盐转变为积盐;种植区总的脱盐率分别为-12.8％,-33.3％,89.0％和94.4％;微咸水灌水量较大的棉花株高和茎粗变化较快,叶片数越多,叶面积越大;在棉花生育期末不同灌水量处理对铃重影响较大,且灌水量越大棉花产量越大,籽棉产量分别为4 681.35,5 052.45,5 006.85,5 817.90 kg/hm2.

英文摘要：

An experiment of light saline water drip irrigation under mulch was conducted in cotton fields at key irrigation experiment station of hydraulic management department of Bayinguoleng Mongolia Autonomous Prefecture in Xinjiang province to analyze the impact of different irrigation amount（300mm,337.5mm,375 mm and 412.5mm）on water-salt transport in different horizontal and vertical position of cotton fields,as well as on cotton growth and yield.The research aimed to establish suitable irrigation program of light saline water drip irrigation under mulch for cotton growth.The results indicated that the soil water content at the depth of 0—40cm slightly fluctuated in wide row,but significantly fluctuated in narrow row and soil between plastic mulch.The minimum of soil water content occurred in the soil between plastic mulch.The soil salinity under dripper reduced at the depth of 0—20cm and strongly fluctuated at the depth of 20—40cm in the growth period of cotton.Soil salinity increased with the decreasing irrigation amount,but the irrigation amount of 375 mm showed the best leaching effect on soil salt in cotton root zone.With the increasing irrigation amount,a certain degree of salification occurred in soil at the depth of 0—40cm in wide row,while desalination occurred in narrow row.The salification of soil between plastic mulch turned into desalination.The total desalination rates were-12.8%,-33.3%,89.0% and 94.4%in the 4treatments with different irrigation amount,respectively.With the increasing irrigation amount,the cotton grew tallerand thicker,and the number and area of leaf increased.The irrigation amount had significant impacts on cotton boll weight at the end of cotton growth period,and cotton yield increased with the increasing irrigation amount.The seed cotton yields were 4 681.35kg/hm2,5 052.45kg/hm2,5 006.85kg/hm2 and5 817.90kg/hm2 in the 4treatments with different irrigation amount,respectively.