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本研究对吐鲁番市的4条河流(大河沿河、塔尔朗河、煤窑沟和黑沟)灌区农田土壤进行了土样分析,测得土壤电导率和土壤总盐、主要离子含量和土壤养分含量,分析了土壤盐渍化类型、程度;土壤盐分与主要离子之间的相关关系;每条河流不同空间的土壤含盐量;不同灌溉水影响的土壤养分组成。结果表明,研究区土壤呈现不同盐渍化趋势,土壤盐分由上而下运动的过程中,以SO_4~(2-)最为活跃,CI~-次之,HCO_3~-和CO_3~-的淋溶速率最慢,吐鲁番市土壤含盐量高低与各离子含量大小有密切的关系,土壤盐分的空间分布因地势不同而有区别,4条河流灌溉区土壤盐渍化类型主要为硫酸盐盐渍土,以河水灌溉为主土壤速效养分含量不及以坎儿井水灌溉为主的土壤速效养分含量高。
In this study, soil samples were collected from farmland in four rivers (Daheyan, Tarlong, Meiyugou and Heiogou) of Turpan City. Soil conductivity, soil total salt, main ion content and soil nutrients Content, the type and degree of soil salinization were analyzed, the correlation between soil salinity and main ions, the salinity of soil in different space of each river, and the soil nutrient composition influenced by different irrigation water. The results showed that the soils in the study area showed different salinization trends and the soil salinity was most active in SO 4 2-, followed by CI 3 -, and leached by HCO 3 - and CO 3 - The rate of soil salinity in Turpan was closely related to the content of each ion. The spatial distribution of soil salinity was different due to different topography. The soil salinization types in the four river irrigation areas were mainly sulphate saline soil , Mainly irrigated by river water, the content of available nutrient in soil is less than that in Khar well water irrigated.