干旱区长期膜下滴灌棉田土壤水盐空间分布特征研究  

Study on Spatial Distribution Characteristics of Soil Moisture and Salinity in Drip Irrigation under Mulch Cotton Fields in Arid Area

作　　者：朱海清[1] 虎胆.吐马尔白 马合木江.艾合买提 赵经华[1] 赵永成[1] 朱冬桥 

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

出　　处：《节水灌溉》2015年第8期54-57,62,共5页Water Saving Irrigation

基　　金：国家自然科学基金项目(51469033);新疆维吾尔自治区"十二五"重大专项(201130103-3);新疆水利水电重点学科资助项目

摘　　要：为了分析干旱区长期膜下滴灌棉田生育期初土壤水盐空间分布特征,在新疆石河子炮台镇试验区进行土壤取样,运用经典统计学方法分析了该试验区不同纵剖面土壤水盐分布特征。研究结果表明：各剖面土壤含水率值几乎相同,其对应的变异性属于中等偏弱性。各剖面土壤含盐率值差异却很大,土壤盐分的变异情况远大于土壤水分的变异情况。经过多年的膜下滴灌作用,在播种前土壤中的盐分逐渐累积在40～80cm土层,并且盐分慢慢控制在有利于作物正常生长的水平。To analyze the distribution characteristics of soil moisture and salinity before sowing in drip irrigation under mulch cotton fields in arid area,a lot of samples were gotten in Paotai town test field of Shihezi city,Xinjiang,where cottons were cultivated under drip irrigation under mulch.The classical statistical method is used to analyze the distribution characteristics of soil moisture and salinity in different longitudinal profiles.The results are as follows：before sowing,the soil moisture content is almost the same in different longitudinal profiles,the moisture variation coefficient belongs to the moderate variability;however,the difference of soil salinity content values is great,and the soil salt variation is far greater than the soil moisture variation;after many years of drip irrigation under mulch,the salt gradually accumulates in 40～80cm soil layer,and the salt content is gradually controlled at the level of normal growing for cottons.

关 键 词：膜下滴灌 生育期初 变异系数 水盐分布 

分 类 号：S152.7[农业科学—土壤学]