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针对内陆河流域空间土壤盐渍化问题,以新疆三工河流域为例,通过调查、取样分析,研究了冲洪积扇和冲洪积平原2个水文地质带上一个生长季5—10月0～10、10～20cm土壤盐分积聚特征及其主导因素。结果表明:冲洪积扇土壤盐分含量明显低于冲洪积平原,盐分含量的变异系数均>100%,属于强变异性;灌溉景观土壤盐分的聚积在冲洪积扇和冲洪积平原相似,盐分含量均减小,而非灌溉景观的差异较大,冲洪积扇区土壤盐分含量减小,土壤盐渍化程度减弱;而冲洪积平原区土壤盐分含量升高,盐渍化程度增强。冲洪积扇区土层间盐分变化关系紧密相关(P<0.01),降雨和灌溉对盐分都具有淋洗作用,促进了盐分含量的减少;冲洪积平原区,蒸发对非灌溉景观0～10cm土层盐分聚积起到促进作用,而10～20cm土层盐分聚积受上层土壤盐分和地下水位共同作用。
Aiming at the problem of soil salinization in the inland river basin, taking the Sangong River basin in Xinjiang as an example, the authors studied the alluvial accumulation fan and the alluvial-plains hydrological belt in a growing season 5-10 Soil Salt Accumulation and Its Leading Factors in 0 ~ 10 and 10 ~ 20cm on the Month. The results showed that the soil salt content of alluvial fan was significantly lower than that of alluvial plain, and the coefficient of variation of salt content was> 100%, which belonged to strong variability. The accumulation of soil salinity in irrigated landscape was similar to that of alluvial fan and alluvial plain , The salt content decreased, but the difference of non-irrigated landscape was larger. The content of soil salinity in the alluvial-hilly area decreased and the degree of soil salinization weakened. However, the soil salinity increased in the alluvial plain, and the degree of salinization Enhanced. (P <0.01). Both rainfall and irrigation had a leaching effect on salt content and promoted the reduction of salt content. In the alluvial-plains plain area, evaporation had a positive effect on the non-irrigated landscape with 0 ~ Salt accumulation in 10 cm soil layer plays a role of promotion, while salt accumulation in 10 ~ 20 cm soil layer is affected by upper soil salinity and groundwater level.