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塔里木河下游典型绿洲滴灌防护林地土壤水盐时空动态/Spatio-temporal Variations of Soil Water and Salinity in Drip Irrigation Shelterbelt in a Typical Oasis in the Lower Reaches of the Tarim River[J]
Authors
中国科学院新疆生态与地理研究所,新疆乌鲁木齐,830011
中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011 中国科学院绿洲生态与荒漠环境重点实验室,新疆乌鲁木齐830011
+7 more
中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011 新疆塔里木河流域干流管理局,新疆库尔勒841000
凌红波
刘新华
张鹏
徐海量
戴岳
白元
Publication date
1 January 2012
Publisher
Abstract
通过野外定位观测,对塔里木河下游典型绿洲防护林地灌溉周期内、不同滴灌年限以及不同质地类型土壤水盐动态进行监测分析。研究结果表明:①绿洲幼龄防护林地土壤水盐变化属于灌溉周期型;灌后土壤湿润体呈"半椭球型"分布,积盐区位于湿润峰附近;当前防护林(沙壤土)滴灌周期为10d较为合适。②实施滴灌1a、2a和5a林地(沙壤土)土壤水分亏缺量逐年增大;0~20cm土层随滴灌年限的增大先脱盐后积盐,20~120cm土层均表现为脱盐。③滴灌5a后,粉黏土林地表层板结层的形成显著抑制40~60cm土壤水分蒸发,盐分呈"表聚型"分布;细沙土林地土壤持水性差,各土层盐分呈"均匀型"分布;沙壤土林地持水性较细沙土林地略高,盐分呈"波动型"分布
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Last time updated on 29/11/2016