中文摘要：

本文研究了不同利用方式下巴音布鲁克高寒草原0-50cm土层土壤颗粒组成及其分形特征与土壤有机碳库活度的关系。结果表明：该区土壤颗粒以粉粒为主,分形维数分布在2.675-2.845之间,与0.05mm粒径关系密切。长期封育和重度放牧分形维数随土层加深而降低,且与碳库活度显著相关;短期封育和中度放牧分形维数变化小,与碳库活度无显著相关性。

英文摘要：

The relationships among 0-50cm soil particle composition,soil fractal characteristics and its soil organic carbon pool activity under different utilization types were studied in the Bayinbuluke alpine grassland.Results showed that the soil in this study area was mostly silt,and the fractal dimension distribution ranged from 2.675 to 2.845,which were closely related with the 0.05 particle size.Under longterm fencing and long-term heavy grazing conditions,the fractal dimension decreased with deepening of soil,and the relationships among particle fractal dimension and carbon pool activity were significantly correlated;however,fractal characteristics changes small under short-term enclosure and moderate grazing conditions,and no significant relationship existed.