生态学杂志2009，Vol.28Issue(11)：2293-2298,6.
干旱区不同景观单元土壤盐分的变化特征
Change characteristics of soil salt content in different landscape units in arid region
摘要
Abstract
Aiming at the problem of soil salinization in inland river basin, a case study was con-ducted in the Sangong River catchment of Xinjiang, China. The characteristics and dominant af-fecting factors of salt accumulation in 0-10 cm and 10-20 cm soil layers in two hydro-geological zones, i. e. , alluvial-proluvial delta and alluvial plain, were studied in a growth season (from May to October), and the precipitation, evaporation, groundwater table, and irrigation were also taken into account. The soil salt content was obviously lower in alluvial-proluvial delta than in al-luvial plain, but its coefficient of variation in the two zones was all higher than 100%, indicating a great variability. The soil salt accumulation in irrigated landscape in the two zones had a similar decreasing trend, but that in non-irrigated landscape had greater difference, with a decreased soil salinization in alluvial-proluvial delta, and an increased soil salinization in alluvial plain. In allu-vial-proluvial delta, the salt contents in 0-10 cm and 10-20 cm soil layers had a close relation-ship (P <0. 01), and there was a clear process of salt leaching by precipitation and irrigation, leading to the decrease of soil salt content. In alluvial plain, the salt accumulation in 0-10 cm soil layer in non-irrigated landscape was promoted by evaporation, and that in 10-20 cm soil lay-er was co-affected by the salt content in 0-10 cm soil layer and the groundwater table.关键词
内陆河流域/盐分聚积/灌溉景观/非灌溉景观Key words
inland river basin/ salt accumulation/ irrigated landscape / non-irrigated landscape分类
农业科技引用本文复制引用
王玉刚,郑新军,李彦..干旱区不同景观单元土壤盐分的变化特征[J].生态学杂志,2009,28(11):2293-2298,6.基金项目
国家自然科学基金项目(40701187)和西部之光资助项目(XBBS200808). （40701187）
