中文摘要：

通过密集采样研究了土地利用方式对喀斯特峰林谷地土壤养分的影响。结果表明：林地和水田土壤有机碳（分别为24．84±10．18g／kg和24．54±7．83g／kg）极显著高于早地（13．25±4．48g／kg，p〈0．01），水田土壤全氮含量（2．64±0．76g／kg）显著高于林地（2．45±1．17g／kg，p〈O．05），且二者极显著地高于旱地（1．68±0．53g／kg，p〈O．01）。林地全磷含量（O．62±0．33g／kg）显著高于旱地（O．57±0．18g／kg，p〈O．05），二者又极显著地高于水田（0．50±0．17g／kg，p〈0．01）。全氮与有机碳呈极显著的线性相关。土壤碳氮比受到有机质组成和肥料施用的共同影响，说明土地利用方式通过植被、人为管理等途径影响土壤养分，为该类型区土壤养分的人为调控提供了基础。

英文摘要：

With a high-density sampling strategy, the effects of land use on soil nutrient in peak-forest valley in southwest China are analyzed, it shows that： （1） Soil organic carbon（SOC） in woodland and paddy field （24. 84±10. 18 g/kg and 24. 54±7.83 g/kg, respectively） is significantly higher than that in dry-land（13.25 ±4.48 g/kg, p〈0.05）; （2） Soil total nitrogen（TN） in paddy field（2. 64±0.76 g/kg） is significantly higher than that in woodland（2. 45±1.17 g/kg, p〈0.05）, and both of them are extremely significantly higher than that in dry-land（1. 68±0.53 g/kg, p〈0. 01）; （3） Soil total phosphorus（TP） in woodland is significantly higher than that in dry-land（0. 57±0. 18 g/kg, p〈0.05）, and both are significantly higher than that in paddy fields（0. 50±0.17 g/kg, p〈0.01）; （4）SOC and TN are significantly linearly correlated. It also shows that soil nutrients are affected by land use in some ways such as vegetable coverage and human management. The study in the paper provides fundamental assistance for the management of soil nutrients in peak-forest valley.