冻融期积雪覆盖棉田水盐运移规律研究  

Sudies on Water and Salt Transport Laws of Cotton Field with Snow Cover during Freezing and Thawing Period

作　　者：朱冬桥 虎胆.吐马尔白 靳志锋 赵永成[1] 李慧[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]新疆伊犁州移民局,伊宁835000

出　　处：《新疆农业大学学报》2013年第6期504-507,共4页Journal of Xinjiang Agricultural University

基　　金：新疆维吾尔自治区"十二五"重大专项(201130103-3);国家自然科学基金项目(51069015);新疆水文学及水资源重点学科(20101202);新疆水利水电重点学科

摘　　要：在新疆石河子121团膜下滴灌棉田进行了野外实验,共设置裸地和覆膜地2种处理地块,各个地块每次取土设3个重复,用烘干法测土壤含水率同时采用电导率仪测定土壤浸提液的电导率,然后换算成土壤的总含盐率。通过覆膜地与裸地的对比,分析了滴灌棉田有无积雪覆盖条件下水盐变化特征。结果表明,覆膜地土壤含水率与裸地变化规律类似,但变化幅度总体上小于裸地。在冻结期,覆膜有利于阻止盐分上移,而在融雪期,覆膜更易造成土壤盐分表聚。This experiment was carried out to drop irrigation in cotton field of Regimental Farm 121 of Xinjiang Production and Construction Corps for field experimental, the bare and film were set up for 2 treatment plots, the soil moisture of the plots of each sampling from 3 replicates were measured by drying method and the conductivity of soil extract were mea sued by conductivity apparat us, which then was converted into total salt content of the soil. In the comparison of film and bare, the change characteristics of water and salt in the cotton field with drip irrigation under the conditions with and without snow covering were analyzed. The result showed that the change law of soil moisture content of bare was similar to that of film, but the variation range was less than that of bare .on the whole ,in the freezing period, film mulching could prevent salt move up.How ever s in snow melt period film mulching could easily cause salt accumulation in topsoil.

关 键 词：地表覆膜 积雪影响 水盐运移 冻融作用 

分 类 号：S152.72[农业科学—土壤学]