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以博斯腾湖西岸湖滨带为研究区,采集三个时期不同土壤剖面样品,结合样品实验分析,探究土壤盐分特征。研究结果表明:(1)0~10 cm土层中平均盐分含量为3.919 g·kg-1,土壤盐分表聚现象强烈;(2)垂直方向上盐分离子中Mg2+变异系数为1.034,变化程度较大,HCO3-变异系数为0.080,变化程度较小;(3)通过相关分析,硫酸盐与氯化物在表土中积聚强烈,其中SO42-与Na++K+之间相关系数为0.96,Cl-与Mg2+相关系数为0.79;Cl-和Na++K+相关系数为0.72;(4)通过对比柽柳剖面下土壤盐分含量,夏秋两个季节土壤剖面土壤盐分呈现明显的表聚现象,0~10 cm土层中盐分含量占总体的27.37%和21.88%,春季盐分在剖面上呈现强烈的底聚现象,90~100 cm土层盐分含量占总体的21.53%;(5)对比不同植被下土壤盐分特征,裸地、草地、林地、耕地四种地表类型土壤中(Na++K+)∶Mg2+∶Ca2+含量之比依次为85∶2.5∶1,16∶2.5∶1,9∶0.9∶1,10∶1.3∶1,裸地中Ca2+含量为0.104 g·kg-1,明显高于其它植被类型中Ca2+含量;Na++K+含量差异不大,平均含量为1.181 g·kg-1;草地中Mg2+平均含量为0.081 g·kg-1,是裸地中Mg2+含量的4.4倍。
Taking the lakeshore belt in the west bank of Bosten Lake as the research area, samples of different soil profiles in three periods were collected. Combined with the experimental analysis of samples, the characteristics of soil salinity were explored. The results showed as follows: (1) The average salt content in 0 ~ 10 cm soil layer was 3.919 g · kg-1, and the phenomenon of surface salt aggregation was strong. (2) The variation coefficient of Mg2 + in salt ions in the vertical direction was 1.034 (3) Through the correlation analysis, the sulfate and chloride accumulate strongly in the topsoil, the correlation coefficient between SO42- and Na ++ K + is 0.96, and the correlation coefficient between Cl- and The correlation coefficient of Mg2 + was 0.79, and the correlation coefficient of Cl- and Na ++ K + was 0.72. (4) By comparing the soil salinity content of Tamarix and Zaoliu profiles, the soil salinity of the soil profile showed obvious surface aggregation in summer and autumn. The salt content in the layer accounted for 27.37% and 21.88% of the total, respectively. The salt accumulation in the spring showed a strong phenomenon of bottom aggregation, and the salt content in the 90-100 cm layer accounted for 21.53% of the total. (5) Compared with the soil salinity characteristics under different vegetations, The contents of (Na ++ K +): Mg2 +: Ca2 + in four types of soils including bare land, grassland, woodland and arable land were 85: 2.5: 1, 16:2, 5:1, 9:0.9:1, 10:1.3 : 1, the content of Ca2 + in bare land was 0.104 g · kg-1, which was significantly higher than that of other vegetation types. The content of Na ++ K + was not significantly different with the average content of 1.181 g kg-1; Mg2 + meadow average content of 0.081 g · kg-1, the bare is 4.4 times the content of Mg2 +.