孔雀河畔土壤盐分空间变异及格局分析

沿孔雀河河流流向每隔5 km,在离河岸50 m处有自然植被分布区的土壤进行分层取样,测定各层土壤含盐量,使用地统计方法分析各层土壤含盐量的空间变异和格局分布特征。结果表明,孔雀河畔0～20,20～40,40～60,60～100 cm土壤各层含盐量分别为:57.44,47.62,40.34,29.9 g/kg,均属重度盐渍化土;土壤含盐量从表层向底层递减,从上游向下游递增;同一平面内变化剧烈程度除表层外,从上向下递减。各层土壤含盐量的空间变程分别为:185.45,33.78,35.80,49.05 km;0～20 cm土壤的空间变异受外界"干扰"影响强烈,其余各层受地质构造影响明显。在此基础之上,分析了这种现象产生的原因并提出了防治建议。

Spatial Variation and Distribution Analysis of Soil Salinity along Kongque Riverside

In this paper, the soil salinity along Kongque riverside was collected of each layer was tested, and the spatial variation of the soil salinity and the distribution characteristics of each layer were analyzed （point interval is 5 km and 50 m to river bank）. The main conclusions are illustrated as follows： the soil salinity of each layers is 57.44,47.62,40.34,29. 9 g/kg respectively from the top to bottom,whose soils are in a severe salinization condition; the salinization decreases from top to bottom and increases from the upper reaches to the lower reaches;changing intensity of the salinization decreases from the top to bottom except the first layer; the salinity of the soil in layers is controlled by the structural factors such as geological structure except the 0--20 cm layer which is strongly effected by the external interference,the ranges of the spatial dependence in each layer are 185.45,33.78,35.80,49.05 km respectively;the distribution of the soil salinity is descending from top layer to bottom layer, from the upper reaches to the downstream; the top layer is intensively interfered by environment. Accordingly, the authors analyzed the causes and put measures to control the salinization of soil along Kongque riverside.