摘要
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 western lakeside of Bosten Lake as study area,soil samples from different soil profiles in three seasons was collected,combined with the samples experiment and analysis to search the soil salinity characteristics. The research results showed that：（ 1） At the soil depth of 0 to 10cm,the average soil salinity content was3. 919 g·kg-1,the phenomenon of salt accumulated in the soil surface was strong;（ 2） In the vertical direction among the salt ions,the variation coefficient of Mg2 ＋was 1. 034 with a bigger change,HCO3-a little change and its variation coefficient was 0. 080;（ 3） Through the correlation analysis,it showed that sulfate and chloride were accumulated strongly in the topsoil,the correlation coefficient between SO42-and Na＋＋ K＋was 0. 96,while the coefficient between Cl-and Mg2 ＋was 0. 79,Cl-and Na＋＋ K＋was 0. 72;（ 4） By contrast soil salt content in tamarisk profiles,the soil salinity showed obvious aggregation in the surface layer during two seasons in summer and autumn,the salt content in 0 to 10 cm soil depth accounted 27. 37% and 21. 88% of the total. But in spring,the soil salinity showed strong aggregation at the bottom of profile,the salt content in 90 to 100 cm layer was 21. 53% of the total;（ 5） Comparing soil salinity characteristics under different land cover,in the four land surface types as bare land,grassland,forestry land and cultivated land,the（ Na＋＋ K＋） ∶ Mg2 ＋∶ Ca2 ＋content weight radio were in turn as 85∶ 2. 5∶ 1,16∶ 2. 5∶ 1,9∶ 0. 9∶ 1 and 10∶ 1. 3∶ 1. In bare land,the content of Ca2 ＋was 0. 104g·kg-1,obviously higher than other land types. The content of Na＋＋ K＋was no any difference,the average content was 1. 181 g·kg-1. In the grassland,the average content of Mg2 ＋was 0. 081 g·kg-1,it was4.4 times of the content of Mg2 ＋in bare land.
出处
《干旱地区农业研究》
CSCD
北大核心
2014年第4期151-158,共8页
Agricultural Research in the Arid Areas
基金
新疆维吾尔自治区自然科学基金项目(2012211A053)
