马尾松林不同龄级土壤抗蚀性分析

Erosion Resistance of Pine Forest Soil in Different Age Class

以贵州省独山县广大的马尾松人工纯林林下的土壤为研究对象,通过对水稳性团聚体、容重、孔隙度、渗透率和有机质几个相关指标的分析,评价黔南地区土壤的抗蚀性,以期为黔南地区水土保持效益评价和造林树种选择提供依据。结果表明:土壤的抗蚀性与土壤的物理性质有极为密切的关系,土壤抗蚀性按不同龄级是成熟林>近熟林>中熟林>幼年林;按土壤层次是自上而下逐渐减小;土壤的渗透率与土壤的抗蚀性成正相关;土壤的孔隙度和有机质的含量与土壤的渗透率和抗蚀性成正相关。

The water stable aggregates,bulk density,porosity,permeability,organic matter and a few relevant indicators of pine plantation soil in Dushan county of Guizhou province were analyzed to provide basis for effectiveness of soil and water conservation evaluation and tree species selection in Qiannan area.The results showed that the sequence of corrosion resistances of the soil in different age class was the mature forest nearly mature forest half-mature forest young forest,and decreased with the increase of soil depth.The permeability was positively correlated with erosion resistance,the porosity and organic matter content were positively correlated with permeability and erosion resistance.