干旱区膜下滴灌下土壤积盐特征研究  

Characteristics of Salt Deposition under Drip Irrigation beneath Plastic Film in Arid Area

作　　者：杨鹏年[1] 董新光 魏光辉[1] 马亮[1] 刘磊[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]新疆水利厅,新疆乌鲁木齐830000

出　　处：《土壤通报》2011年第2期360-363,共4页Chinese Journal of Soil Science

基　　金：水利部公益项目(200801050);国家科技支撑计划(2007BAD38B01);自治区重大科技专项(20073117-1);新疆水利水电工程重点学科联合资助

摘　　要：主要对膜下滴灌后的土壤盐分分布的特征进行了研究,结果表明:在生长期内,位于90 cm深土层内土体的平均含盐量在上升,出现了一定的积盐。在距地表40 cm深的范围内,则存在盐分定向迁移的现象,其积聚的范围主要分布在湿润区的边缘,其程度则取决于土壤质地、每次灌水量大小及气候等多种因素。经过一个灌溉周期后,土壤积盐区的含盐量可达到初始值的一倍左右。这一结论对干旱气候下膜下滴灌区的冬灌具有一定的实际指导作用,灌区应根据土壤含盐量的大小而决策是否需要冬灌,从而达到减少干旱区农业用水量过大的目标。The characteristics of salt deposition was tested under drip irrigation beneath plastic film in arid area.The results showed that the soil average salt content increased in column of 0-90 cm.Simultaneously,the soil average salt content in column of 0-40 cm represented the characteristics of directional removing.The range of salt deposition mainly distributed in the brink of wettish area.After growth cycle of crop irrigation,the cumulative amount of soil salt was 2 times than original value.Therefore,the conclusions had the practice effect that annual winter irrigation could not be necessary.The farmer could make decision about whether winter irrigation need on the base of the soil salt content.Consequently,the goal of decreasing amount of agricultural water could be implemented.

关 键 词：干旱区 膜下滴灌 土壤盐分 

分 类 号：S275.6[农业科学—农业水土工程]