不同土地利用方式对土壤含水量、pH值及电导率的影响

以林芝地区八一镇5种植被类型下土壤为研究对象,研究其土壤剖面(0—50 cm)的含水量、pH值及电导率分布特征。结果表明,土地利用方式影响了土壤含水量、pH值和电导率在垂直剖面上的空间分布,尤其以表层(0—20 cm)土壤含水量和电导率受影响最为明显。草地土壤含水量表现出明显的“表聚”效应,即随着土层加深,含水量呈降低趋势。在区域空间上,土壤含水量和电导率具有较强的空间变异性,而土壤pH值的空间变异性较小。随着土层加深,各层土壤含水量和电导率之间的变异性逐渐减小。

Effects of land use on soil moisture,pH and electrical conductivity

In order to clarify the soil moisture content, pH value and variation characteristics of electrical conductivity in 0-50 cm soil layer under different vegetation types, soil samples collected under 5 vegetation types in Bayi Town, Linzhi were adopted as the study object. It was shown that land use type did influence the vertical distribution of soil moisture content, pH value and electrical conductivity in soil profile, especially the moisture content and electrical conductivity in the surface layer (0-20 cm). Moisture content of grassland exhibited aggregation as the moisture content was decreased with the deepening of soil layer. Soil moisture content and electrical conductivity showed stronger spatial variability, while the variation of pH value was smaller. With the deepening of soil layer, the variation of soil moisture content and electrical conductivity in different soil layers gradually decreased.