农业工程学报2012，Vol.28Issue(22)：82-87,6.DOI:10.3969/j.issn.1002-6819.2012.22.013
长期膜下滴灌农田土壤盐分时空变化
Spatiotemporal variation for soil salinity of field land under long-term mulched drip irrigation
摘要
Abstract
A field that has been irrigated with mulched drip technique for 13 years was selected for researching on the effects of the long-term utilization of mulched drip irrigation technique on the evolution of soil salinity distribution. Based on the spatiotemporal variation of soil salinity distribution, the soil salinity evolution characteristics were analyzed. It was found that the soil salinity of the field was decreased substantially during the initial stage of utilizing the mulched drip irrigation, then the decrease rang was declined with the using of irrigation technique; ultimately a stable soil salinity was obtained in the field. After 13 years irrigation with mulched drip technique, soil salinity in 0-100 cm soil layer of the researched field had been declined from 20-30 to 5 g/kg, and that below 20 cm soil depth of the field margin was stable at 5-10 g/kg, which was larger than that in the corresponding soil layer of the field. But soil salt assembled at the surface of the field margin resulted in that soil salinity at the surface of field margin was larger than 20 g/kg. The salinity of entire soil layer in the field land could not be increased by the salty accumulation at soil wetting front. The study provides a reference for the reasonable use of mulched drip irrigation technique.关键词
灌溉/土壤/盐度测定/膜下滴灌/农田/演变特征Key words
irrigation/ soils/ salinity measurement/ mulched drip irrigation/ field land/ evolution characteristics分类
农业科技引用本文复制引用
李明思,刘洪光,郑旭荣..长期膜下滴灌农田土壤盐分时空变化[J].农业工程学报,2012,28(22):82-87,6.基金项目
973计划前期研究专项(2009CB125901) （2009CB125901）
新疆生产建设兵团软科学研究计划(2011BB039) （2011BB039）
石河子大学科技攻关计划(gxjs2011-zdgg03-05) （gxjs2011-zdgg03-05）
