Soil Respiration and its Driving Factors in an Alpine Peatland and Meadow during the Non-growing Season

doi:10.11733/j.issn.1007-0435.2026.10.023

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (10): 3773-3783.DOI: 10.11733/j.issn.1007-0435.2026.10.023

Soil Respiration and its Driving Factors in an Alpine Peatland and Meadow during the Non-growing Season

WU Zhi-rang¹, LIN Zhen-rong², AI Ming-chao³, XU Xue-mei⁴, MA Lei⁵, CAO Wen-xia¹

1. College of Prataculture, Gansu Agricultural University/Key Laboratory of Prataculture Ecosystem of Ministry of Education/China-US Research Center for Sustainable Development of Grassland Animal Husbandry, Lanzhou, Gausu Province 730070, China;
2. College of Ecology, Lanzhou University, Lanzhou, Gansu Province 730000, China;
3. College of Grassland Resources, Southwest Minzu University, Chengdu, Sichuan Province 610041, China;
4. College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China;
5. College of Atmospheric Sciences, Lanzhou University, Lanzhou, Gansu Province 730000, China

Received:2025-12-10 Revised:2026-01-25 Published:2026-10-10

高寒泥炭地和草甸非生长季土壤呼吸特征与驱动因素研究

吴志让¹, 林轸荣², 艾明超³, 许雪梅⁴, 马磊⁵, 曹文侠¹

1. 甘肃农业大学草业学院/草业生态系统教育部重点实验室/中-美草地畜牧业可持续发展研究中心, 甘肃兰州 730070;
2. 兰州大学生态学院, 甘肃兰州 730000;
3. 西南民族大学草地资源学院, 四川成都 610041;
4. 中国农业大学草业科学与技术学院, 北京 100193;
5. 兰州大学大气科学学院, 甘肃兰州 730000

通讯作者: 曹文侠, E-mail: caowx@gsau.edu.cn
作者简介:吴志让（2001-），男，汉族，甘肃会宁人，硕士研究生，主要从事草地生态研究，E-mail：wzr1230zy@126.com
基金资助:
国家牧草产业技术体系（CARS-34）资助

Abstract

Abstract: Soil respiration （R_s） makes a significant contribution to the carbon budget of alpine ecosystems. Previous studies have largely focused on the growing season， while quantification of R_s during the non-growing season in alpine peatlands and meadows， as well as the influence of different microtopographies within peatlands， remains insufficient. This study selected frost-heaved hummocks （Hu）， peat hollows （Ho）， Kobresia capillifolia tussocks （Tu） in an alpine peatland， and a typical alpine meadow （Meadow） as the research subjects. Using the static chamber-gas chromatography method， R_s was measured weekly during the non-growing season （October 30， 2023-April 14， 2024）. Simultaneously， soil temperature （T_s）， volumetric water content （VWC）， and water table depth （WTD） were monitored. The results showed that soil respiration rates differed between the alpine peatland and meadow during the non-growing season. The cumulative Rs across microtopographies in the peatland ranked from high to low as follows： Tu（1179.4±38.5） kg·ha^-1； Hu（710.3±59.6） kg·ha^-1； Ho（428.9±45.4） kg·ha^-1. The cumulative R_s in the alpine meadow was （971.7±85.9） kg·ha^-1. Specifically， R_s rates in Hu and Tu showed a significant positive correlation with soil temperature （R²=0.481-0.852， P<0.0001）， whereas no significant relationship was found in Ho. In the meadow， Rs rate also increased exponentially with rising soil temperature （R²=0.559， P<0.0001）. No significant relationship was observed between R_s and VWC or WTD. These findings demonstrate that R_s in alpine peatlands and meadows during the non-growing season is primarily regulated by soil temperature， and its response mechanisms vary across different microtopographies.

Key words: Alpine ecosystem, Non-growing season, Soil respiration, Soil temperature, Water table depth, Static chamber method

摘要： 土壤呼吸（Soil respiration，R_s）对高寒生态系统碳收支具有重要贡献，以往研究多关注生长季，而对高寒泥炭地和草甸非生长季的土壤呼吸及泥炭地内部不同微地形的影响缺乏量化研究。本研究选取高寒泥炭地中的冻胀草丘（Hummock，Hu）、泥炭洼地（Hollow，Ho）、线叶嵩草斑块（Tussock，Tu）以及典型高寒草甸（Meadow）为研究对象，采用静态箱-气相色谱法于当年非生长季（2023年10月30日—2024年4月14日）进行每周一次的土壤呼吸观测，并同步监测土壤温度（Soil temperature，T_s）、体积含水量（Volumetric water content，VWC）与水位（Water table depth，WTD）。结果表明：非生长季期间，高寒泥炭地和草甸土壤呼吸速率不同。泥炭地微地形间土壤呼吸累积量（以碳记）由高到低依次为Tu（1179.4±38.5） kg·ha^-1，Hu（710.3±59.6） kg·ha^-1，Ho（428.9±45.4） kg·ha^-1。高寒草甸土壤呼吸累积量为（971.7±85.9） kg·ha^-1。其中，Hu和Tu的土壤呼吸速率与土壤温度呈显著正相关（R²=0.481~0.852，P<0.0001），而在Ho中无显著关系。草甸土壤呼吸速率亦随土壤温度升高呈指数增长（R²=0.559，P<0.0001）。土壤呼吸与VWC和WTD的关系不显著。证明高寒泥炭地和草甸非生长季 R_s 主要受土壤温度调控，且在不同微地形中响应机制存在差异。

关键词: 高寒生态系统, 非生长季, 土壤呼吸, 土壤温度, 水位, 静态箱法

CLC Number:

S812.2

WU Zhi-rang, LIN Zhen-rong, AI Ming-chao, XU Xue-mei, MA Lei, CAO Wen-xia. Soil Respiration and its Driving Factors in an Alpine Peatland and Meadow during the Non-growing Season[J]. Acta Agrestia Sinica, 2026, 34(10): 3773-3783.

吴志让, 林轸荣, 艾明超, 许雪梅, 马磊, 曹文侠. 高寒泥炭地和草甸非生长季土壤呼吸特征与驱动因素研究[J]. 草地学报, 2026, 34(10): 3773-3783.

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Soil Respiration and its Driving Factors in an Alpine Peatland and Meadow during the Non-growing Season

高寒泥炭地和草甸非生长季土壤呼吸特征与驱动因素研究

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