冬季增温及刈割对青藏高原高寒草地土壤有机碳组分及碳库稳定性的影响

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doi：10.11733/j.issn.1007-0435.2026.03.018

引用格式：，等.冬季增温及刈割对青藏高原高寒草地土壤有机碳组分及碳库稳定性的影响[J].草地学 报，2026，34（3）：940-948 ZHANG Hao，MA Fu-lin，LIU Xiao-wei，etal. Efects of Winter Warming and Clipping on Soil Organic Carbon Fractions and CarbonPoolStabilityinAlpineGrasslandsoftheTibetPlateau[J].ActaAgrestiaSinica，2026，34（3）：940 -948

关键词：冬季增温；刘割；高寒草原；有机碳组分；碳库稳定性中图分类号：S154.1 文献标识码：A 文章编号：1007-0435（2026）03-0940-09

Abstract：The changes in the carbon pool ofalpine grasslands of the Qinghai-Tibet Plateau playan irreplaceably significant role in promoting regional ecological balance and sustainable development. This study focused on the alpine grassands of the Qinghai-Tibet Plateau and analyzed the efects of winter Warming，clipping，and their interactions on soil organic carbon components and the stability of carbon pool. The results indicated that winter warming significantly increased the content of easily oxidisable organic carbon in the soil. Clipping significantly increased the content of soil particulate organic carbon and decreased the content of mineral-bound organic carbon （ ⋅P<0.05） .The interaction between winter warming and clipping significantly reduced the content of mineral-bound organic carbon （P<0.05） . Winter warming significantly enhanced soil carbon pool activity，the carbon pool activity index，and the carbon pool management index （ ⋅P<0.05） .Soil moisture content showd a highly significant positive correlation with the content of mineral-bound organic carbon （ .P<0.01 ），while it exhibited a significant negative correlation with the carbon pool activity and the carbon pool activity index （ P< 0.05）.Redundancy analysis and hierarchical partitioning revealed that soil moisture content and nitrate nitrogen concentration significantly influenced the components of soil organic carbon and the stability of the carbon pool. This study provides fundamental data for understanding the changes in soil organic carbon pools under the effcts of climate change and human activities in the alpine grasslands of the Qinghai-Tibet Plateau.

Key words： Winter warming;Clipping;Alpine grasslands;Organic carbon fractions;Carbon pool stability

青藏高原是地球上最独特的地理单元之一，但其脆弱的生态系统对气候变化十分敏感[1]。（剩余17853字）