Long-term Drainage Reduces Soil Enzyme Activities in Alpine Peatlands on the Zoige Plateau

doi:10.11733/j.issn.1007-0435.2025.05.006

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (5): 1398-1407.DOI: 10.11733/j.issn.1007-0435.2025.05.006

Long-term Drainage Reduces Soil Enzyme Activities in Alpine Peatlands on the Zoige Plateau

SHI Rong-xi^1,2,3, WANG Quan-cheng^2,3, LIU Ning^2,3, LIU Meng-jie^2,3, WANG Jin-song^2,3, HU Jian^1,2, WANG Hui^1,2, CHEN You-jun^1,2, ZHOU Qing-ping^1,2

1. College of Grassland Resources, Southwest Minzu University, Chengdu, Sichuan Province 610041, China;
2. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research of Chinese Academy of Sciences, Beijing 100101, China;
3. Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Southwest Minzu University, Chengdu, Sichuan Province 610041, China

Received:2024-11-08 Revised:2024-12-25 Online:2025-05-15 Published:2025-05-20

长期排水降低若尔盖高寒泥炭地土壤酶活性

时蓉喜^1,2,3, 王全成^2,3, 刘宁^2,3, 刘梦洁^2,3, 汪金松^2,3, 胡健^1,2, 汪辉^1,2, 陈有军^1,2, 周青平^1,2

1. 西南民族大学草地资源学院, 四川成都 610041;
2. 中国科学院生态系统网络观测与模拟重点实验室, 中国科学院地理科学与资源研究所, 北京 100101;
3. 四川若尔盖高寒湿地生态系统国家野外科学观测研究站, 四川成都 610041

通讯作者: 周青平,E-mail:qpingzh@aliyun.com
作者简介:时蓉喜（2000-），女，汉族，河南商丘人，硕士研究生，主要从事草地生态学研究，E-mail：rongxishi2022@163.com
基金资助:
四川若尔盖高寒湿地生态系统国家野外科学观测研究站开放课题（ZAW01）；国家自然科学基金项目（32171593）资助

Abstract

Abstract: The alpine peatland in Zoige plays an important role in global carbon storage and climate regulation， and drainage has an important impact on soil characteristics and ecological functions of the peatland. At present， the response of soil enzyme activity to drainage in the area is still unclear. This study selected alpine peatland that have been drained for 50 years and adjacent near-natural peatland to explore the response of soil hydrolase and oxidase activities to drainage， and to reveal the mechanism of drainage on soil enzyme activities in alpine peatlands from aspects such as plants and soil physicochemical properties. The results showed that along the soil profile， soil enzyme activities and most soil physicochemical properties significantly decreased， while the nutrient stoichiometric ratio significantly increased. After drainage， nitrate nitrogen and available phosphorus in different soil layers showed an upward trend， while other physicochemical properties showed a downward trend and the hydrolase activities in the 20-100 cm soil layer and the oxidase activities in different soil layers significantly decreased. The effects of drainage on soil enzyme activities were mainly jointly regulated by soil water content， pH value， aboveground biomass of plants， soil nutrients and stoichiometric ratios. This study provides certain scientific basis for understanding the soil carbon dynamics in alpine peatlands and the management of peatland carbon pools.

Key words: Peatlands, Drainage, Hydrolase, Oxidase, Soil physicochemical properties, Soil profile

摘要： 若尔盖高寒泥炭地在全球碳储存和气候调节中有重要角色，排水对泥炭地土壤特性和生态功能产生重要影响。目前，土壤酶活性对排水的响应尚不明确。本研究选取了排水50年后的高寒泥炭地和邻近的近自然泥炭地，探讨土壤水解酶和氧化酶活性对排水的响应，并从植物和土壤理化性质等方面揭示排水对高寒泥炭地土壤酶活性的影响机制。结果表明，随土壤剖面深度增加，土壤酶活性和大部分土壤理化性质均显著降低，养分化学计量比均显著增加。排水处理后，不同土层的硝态氮和有效磷含量呈上升趋势，其他理化性质均呈下降趋势；20~100 cm土层水解酶活性和不同土层氧化酶活性显著降低。排水对土壤酶活性的影响主要受土壤水分含量、pH值、植物地上生物量、土壤养分含量及化学计量比的共同调控。本研究为理解高寒泥炭地土壤碳动态和泥炭地碳库管理提供一定的科学依据。

关键词: 泥炭地, 排水, 水解酶, 氧化酶, 土壤理化性质, 土壤剖面

CLC Number:

S812.2

SHI Rong-xi, WANG Quan-cheng, LIU Ning, LIU Meng-jie, WANG Jin-song, HU Jian, WANG Hui, CHEN You-jun, ZHOU Qing-ping. Long-term Drainage Reduces Soil Enzyme Activities in Alpine Peatlands on the Zoige Plateau[J]. Acta Agrestia Sinica, 2025, 33(5): 1398-1407.

时蓉喜, 王全成, 刘宁, 刘梦洁, 汪金松, 胡健, 汪辉, 陈有军, 周青平. 长期排水降低若尔盖高寒泥炭地土壤酶活性[J]. 草地学报, 2025, 33(5): 1398-1407.

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Long-term Drainage Reduces Soil Enzyme Activities in Alpine Peatlands on the Zoige Plateau

长期排水降低若尔盖高寒泥炭地土壤酶活性

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