植被恢复对喀斯特地区土壤质量的影响研究

Study on the Influence of Vegetation Restoration on Soil Quality in Karst Area

为了研究植被恢复对减缓土壤侵蚀的影响,文章选取5种植被类型,采用土壤质量指数研究了不同植被恢复类型对土壤质量的影响。结果表明:耕地土壤的堆积密度较高,可达到1.42~1.53 g/cm^(3)。自然恢复灌丛的表层土壤含水量最高,为0.52%。不同植被的土壤有机碳含量和总氮含量为原生林>自然恢复灌丛>人工林地>人工草地>耕地,总磷含量为原生林>人工草地>人工林地>自然恢复灌丛>耕地,总钾含量为原生林>人工草地>自然恢复灌丛>耕地>人工林地。原生林的土壤质量指数显著高于其他植被类型,耕地的土壤质量指数最低。

In order to study the effect of vegetation restoration on soil erosion mitigation,five vegetation types are selected in this paper.The soil quality index is used to study the influences of different vegetation restoration types on soil quality.The results showed that the bulk density of cultivated soil is high,which could reach 1.42 g/cm~1.53 g/cm.The highest soil moisture content appears in natural restoration shrub,which is 0.52%.The contents of soil organic carbon and total nitrogen of different vegetation are in the order of primary forest,natural restoration shrub,artificial forest.artificial grassland and cultivated land from large to small.The contents of total phosphorus are in the order of primary forest,artificial grassland,artificial forest,natural restoration shrub and cultivated landfrom large to small.And the contents of total potassium are in the order of primary forest,artificial grassland,natural restoration shrub,cultivated land and artificial forest land from large to small.The soil quality index of primary forest is significantly higher than that of other vegetation types.The soil quality index of cultivated land is the lowest.