中文摘要：

以新疆伊犁绢蒿（Seriphidium transiliense）荒漠草地为对象,研究了不同封育年限对草地土壤活性有机碳及碳库管理指数的影响。结果表明,0-5 cm土层,土壤碳密度呈封育9年〉对照〉封育1年〉封育6年,易氧化活性有机碳、碳库管理指数为封育9年〉对照〉封育6年〉封育1年,且封育9年土壤碳密度显著高于封育6年,相对增加了36.51%,而其易氧化活性有机碳、碳库管理指数显著高于其他处理（P〈0.05）,分别增加了35.81%-84.89%、35.83%-93.96%;土壤有机质、全量养分分别与土壤易氧化活性有机碳、碳库活度、碳素有效率、氧化稳定系数间呈显著（P〈0.05）或极显著（P〈0.01）相关,而土壤碳库管理指数、易氧化活性有机碳与群落生物量的灰色加权关联度高于土壤有机质和碳密度。土壤碳库活度指数、碳库管理指数能较为敏感地指示土壤碳与草地初级生产力的变化。

英文摘要：

Influences of different enclosure periods on grassland soil active organic carbon and carbon pool management index were studied in Seriphidium transiliense desert grassland in Xinjiang. The results showed that soil carbon density decreased in the following order： Enclosed 9 years〉 Control〉 Enclosed 1 year〉Enclosed 6 years, and soil active organic carbon and carbon pool management index decreased in the following order： Enclosed 9 years〉 Control〉 Enclosed 6 year,Enclosed 1 years. The soil carbon density in grassland enclosing 9 years was significantly higher （P〈0.05） than that of enclosing 6 years which increased 36.51%, while soil active organic carbon and carbon pool management index of enclosing 9 years were significantly higher than those of the other treatments in the soil layer of 0--5 cm（P〈0.05） which increased 35.81%-84.89% and 35.83%-93.96% respectively. Soil organic matter, total phosphorus, nitrogen and potassium had significant （P〈0.05） or extremely significant （P〈0.01） correlations with soil active organic carbon, carbon activity and efficiency, while the grey correlative degree of soil carbon pool management index, active organic carbon and biomass of community was higher than that of soil organic matter and carbon density. Soil active organic carbon and carbon pool management index could be more sensitive to indicate the changes of soil carbon and primary productivity in grassland.