祁连山南麓植物根系改善土壤抗冲性研究

 对祁连山南麓相同土壤类型,相同立地条件,相同植被类型,相同林龄的样地进行对比,分析随着植物根系分布和数量差异,对土壤理化性质的影响,以及这种影响对提高土壤抗冲性的作用。结果表明,丰富的根系能够增加土壤有机质、水稳性团聚体含量,降低土壤容重,增加非毛管孔隙度,进而增强土壤疏松性和透水性,增强土壤下渗能力,增强土壤抗冲性。通过研究指出,为了防治青海省大通县水土流失,应该加强造林与管护。

Effects of Plant Root System on the Anti-scourability of Soil in the South of Qilian Mountain

The studies on root system of plant community and soil anti-scourability reveals the rule of it where in the same soil type, site condition, vegetation type and age of stand between plots. The effect of plants' root system to soil anti-scourability is analyzed. That plants' rich root system can change the character of soil is concluded. It can increase soil organic matter, aggregate content of water stability and non-capillary soil porosity, decreasing soil bulk density. Soil and soil permeability can be loosed and enhanced by the increase of organic matter, and then, soil anti-scourability can be enhanced. To control soil erosion, afforestation and forest management should be enhanced in Datong county, Qinghai province.