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选择中科院湖南桃源农业生态试验站典型覆被坡面作为研究对象,通过现场实验与野外采样分析,确定不同覆被的土壤饱和渗透系数及不同埋深的非饱和导水率曲线,分析红壤丘陵区土壤渗透性及其受植被的影响。结果表明,植被类型显著影响土壤渗透性能,其渗透能力由强至弱依次为原生林、油茶林、针叶林和恢复区裸地。不同根系特征土壤的入渗能力不同,根系愈发达渗透性愈好。由此也证明了所得到不同埋深的土壤非饱和导水率曲线的可靠性,为下一步红壤丘陵区生态水文模拟提供分析基础。
Select the typical cover slope of Hunan Taoyuan Agro-Ecological Experimental Station of CAS as the research object. Through the field experiment and field sampling analysis, the saturated permeability coefficient and the unsaturated hydraulic conductivity curve of different cover depths were determined, and the red soil hilly region Soil Permeability and Its Impacts on Vegetation. The results showed that the vegetation types significantly affected the soil permeability, and the infiltration capacity of the soil from primary forest to the next camellia forest, coniferous forest and restoration area from strong to weak. Different root characteristics of soil infiltration capacity is different, the more developed root permeability better. This also proves the reliability of unsaturated soil hydraulic conductivity curve obtained at different depths, and provides the basis for the next step ecological and hydrological simulation in hilly red soil region.