晋西北黄土丘陵区不同植被类型土壤水分分析

Analysis of Soil Water Content of Different Vegetation Types in the North-Western Part of Shanxi Province

选择晋西北半干旱黄土丘陵区典型植被人工油松林、天然灌丛、荒坡草地和农地 ,对其土壤剖面 0 - 9.9m的土壤水分进行了测定与分析。结果显示 ,农地 0 - 9.9m土壤剖面上的土壤水分皆在易效水范围之上。人工油松林、天然灌丛和荒坡草地的土壤湿度低于农地 ,三者对土壤水分的利用深度都超过了 9.9m,并且大部分土层的水分含量在中效水范围内 ,部分在难效 -无效水范围。由此可见 ,天然植被对土壤水的利用与农地相比有显著差异。

This study tested the soil water contents of four typical vegetation types- the artificial Pinus tabulaefomis Carr. ,natural bushwood, grazing land and farmland in the Loess hilly area of the northwestern part of Shanxi province. The maximum soil depth to which the soil water was measured was 9.9m in this study. The results showed that the soil water moistures in most part of farmland soil profile were up the easily available water content range, the soil water contents of artificial Pinus tabulaefomis Carr., natural bushwood land and natural grazing land are by far lower than that of farmland along the whole soil profiles, and most of the soil moistures in their soil profiles were within the medium available water content range. We knew from the study result that the difference of soil water contents between natural vegetation and farmland was distiction.