喀斯特小流域生态治理下土壤养分特征分析——以广西都安县澄江小流域为例

摘要

This paper analyses the soil nutrient characteristics within different ways of land use in the process of ecological management in a typical small Karst watershed.The results show that the nutrients of brown limestone soil in 2008 have been increased than that in 1990.Two principal components were revealed based on principal component analyzing of 48 soil samples with SPSS16.0.The score of the principal component were assigned and ranked according to the different ways of land use,and the rank result is in the arbor shrubbery cultivated land on valleys shrubbery with grass grasscultivated land on slope.The areas of good cover land are with high soil nutrient content,and they are easy to gather soil nutrient content themselves.%选择广西典型喀斯特小流域,对生态治理过程中不同土地利用方式的土壤养分特征进行了研究和分析。结果表明棕色石灰土养分含量在经过石漠化治理后较1990年平均水平有所提高,用SPSS16.0对48个土壤样品的土壤养分进行主成分分析,得出2个主成分,并对土壤样品按不同土地利用方式得出的主成分分值进行排名,得分依次为乔木林〉灌木林〉沟谷耕地〉灌草丛〉草丛〉坡耕地。土地覆被好的区域土壤养分的含量高,土壤养分易于在植被较好的区域聚集。