Effects of Winter Warming and Clipping on Soil Organic Carbon Fractions and Carbon Pool Stability in Alpine Grasslands of the Tibet Plateau

doi:10.11733/j.issn.1007-0435.2026.03.018

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (3): 940-948.DOI: 10.11733/j.issn.1007-0435.2026.03.018

Effects of Winter Warming and Clipping on Soil Organic Carbon Fractions and Carbon Pool Stability in Alpine Grasslands of the Tibet Plateau

ZHANG Hao^1,2, MA Fu-lin³, LIU Xiao-wei², YANG Cong-ying⁴, MUTALIFU Wu-bu-li⁴, WANG Xiao-li⁵, ZHANG Qiang⁶, GUO Liang^1,2,7

1. Key Laboratory of Alpine Grassland Ecology in the Three Rivers Region (Qinghai University), Ministry of Education, Xining, Qinghai Province 810016, China;
2. State Key Laboratory of Soil and Water Conservation and Desertification Control, Northwest A&F University, Yangling, Shaanxi Province 712100, China;
3. Qinghai Haibei Livestock Experiment Weather Station, Haibei, Qinghai Province 810200, China;
4. College of Grassland Agriculture, Northwest A&F University Yangling, Shaanxi Province 712100, China;
5. State Key Laboratory of Plateau Ecology and Agriculture, Key Laboratory of the Alpine Grassland Ecology in the Three Rivers Region Ministry of Education, Qinghai University, Xining, Qinghai Province 810016, China;
6. Academy of Animal Sciences and Veterinary Medicine, Qinghai University, Xining, Qinghai Province 810016, China;
7. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi Province 712100, China

Received:2025-07-09 Revised:2025-08-26 Published:2026-03-23

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

张浩^1,2, 马扶林³, 刘小伟², 杨聪颖⁴, 木塔力甫·吾布力⁴, 王晓丽⁵, 张强⁶, 郭梁^1,2,7

1. 三江源区高寒草地生态教育部重点实验室, 青海西宁 810016;
2. 西北农林科技大学水土保持与荒漠化整治全国重点实验室, 陕西杨凌 712100;
3. 青海省海北牧业气象试验站, 青海海北 810200;
4. 西北农林科技大学草业与草原学院, 陕西杨凌 712100;
5. 省部共建三江源生态与高原农牧业国家重点实验室, 三江源区高寒草地生态教育部重点实验室, 青海大学, 青海西宁 810016;
6. 青海大学畜牧兽医科学院, 青海西宁 810016;
7. 中国科学院水利部水土保持研究所, 陕西杨凌 712100

通讯作者: 郭梁，E-mail：guoliang2014@nwafu.edu.cn
作者简介:张浩（1997-），男，汉族，甘肃天水人，硕士研究生，主要从事气候变化下草地生态系统研究，E-mail：2377876212@qq.com；
基金资助:
三江源区高寒草地生态教育部重点实验室开放课题（2023-SJYKF-04）；国家自然科学基金项目（42377471）资助

Abstract

Abstract: The changes in the carbon pool of alpine grasslands of the Qinghai-Tibet Plateau play an irreplaceably significant role in promoting regional ecological balance and sustainable development. This study focused on the alpine grasslands of the Qinghai-Tibet Plateau and analyzed the effects 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 effects 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

摘要： 青藏高原高寒草原碳库变化在促进地区生态平衡及区域可持续发展中具有不可替代的重要意义。本研究以青藏高原高寒草原为研究对象，分析冬季增温、刈割及其交互作用对土壤有机碳组分及其碳库稳定性的影响。结果表明：冬季增温显著提升土壤易氧化有机碳含量。刈割显著提升土壤颗粒态有机碳含量，降低矿物结合态有机碳含量（P<0.05）。冬季增温、刈割交互作用显著降低土壤矿物结合态有机碳含量（P<0.05）。冬季增温显著提升了土壤碳库活度、碳库活度指数及碳库管理指数（P<0.05）。土壤含水量与矿物结合态有机碳含量呈极显著正相关（P<0.01），而与碳库活度、碳库活度指数呈显著负相关（P<0.05）。冗余分析与层次分割表明，土壤含水量与硝态氮含量显著影响土壤有机碳组分及碳库稳定性。本研究可为气候变化及人为活动影响下的青藏高原高寒草原土壤有机碳库变化提供基础数据。

关键词: 冬季增温, 刈割, 高寒草原, 有机碳组分, 碳库稳定性

CLC Number:

S154.1

ZHANG Hao, MA Fu-lin, LIU Xiao-wei, YANG Cong-ying, MUTALIFU Wu-bu-li, WANG Xiao-li, ZHANG Qiang, GUO Liang. Effects of Winter Warming and Clipping on Soil Organic Carbon Fractions and Carbon Pool Stability in Alpine Grasslands of the Tibet Plateau[J]. Acta Agrestia Sinica, 2026, 34(3): 940-948.

张浩, 马扶林, 刘小伟, 杨聪颖, 木塔力甫·吾布力, 王晓丽, 张强, 郭梁. 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.

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Effects of Winter Warming and Clipping on Soil Organic Carbon Fractions and Carbon Pool Stability in Alpine Grasslands of the Tibet Plateau

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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