城郊荒地–林地–草地生态系统土壤CO2浓度的差异、季节变化及其影响因素

doi:10.13209/j.0479-8023.2025.107

北京大学学报（自然科学版） ›› 2025, Vol. 61 ›› Issue (6): 1188-1200.DOI: 10.13209/j.0479-8023.2025.107

城郊荒地–林地–草地生态系统土壤CO₂浓度的差异、季节变化及其影响因素

苏晓曼¹, 郭淑文¹, 李宏博¹, 卢巧改¹, 吕佳宝¹, 李芳^1,2,†

1. 河南农业大学资源与环境学院, 郑州 450046 2. 北京大学城市与环境学院, 北京 100871

收稿日期:2024-11-07 修回日期:2025-06-19 出版日期:2025-11-20 发布日期:2025-11-20
通讯作者: 李芳, E-mail: fangli0901(at)henau.edu.cn
基金资助:
国家自然科学基金(42377334)和河南省自然科学基金优秀青年项目(242300421147)资助

Differences, Seasonal Variations and Influencing Factors of Soil CO₂ Concentration in Suburban Wasteland-Forestland-Grassland Ecosystems

SU Xiaoman¹, GUO Shuwen¹, LI Hongbo¹, LU Qiaogai¹, Lü Jiabao¹, LI Fang^1,2,†

1. College of Resources and Environment, Henan Agricultural University, Zhengzhou 450046 2. College of Urban and Environmental Sciences, Peking University, Beijing 100871

Received:2024-11-07 Revised:2025-06-19 Online:2025-11-20 Published:2025-11-20
Contact: LI Fang, E-mail: fangli0901(at)henau.edu.cn

摘要/Abstract

摘要：

为了研究城郊不同生态系统土壤CO₂浓度的差异、季节变化及其影响因素, 于2023年3月—2024年2月对城郊荒地、林地和草地生态系统土壤进行周年定位监测, 分析土壤CO₂浓度、O₂浓度、酶活性和活性碳氮指标的变化特征。结果表明, 草地的年均CO₂浓度最高, 荒地最低, 林地居中; 各生态系统土壤CO₂浓度亚表层均高于表层; 3种生态系统土壤CO₂浓度的季节变化均表现为夏季高, 冬季低, 春秋季居中; 不同生态系统的土壤碳氮含量及水解酶活性等存在差异; 各生态系统土壤CO₂浓度随气温、土壤温度和含水量指数增加而增加, 与O₂浓度呈指数级负相关。

关键词: 城郊生态系统, 土壤CO₂, 季节变化, 土壤水解酶

Abstract:

In order to study the differences, seasonal variations and influencing factors of soil CO₂ concentration in different ecosystems, we conducted annual fixed-point monitoring of soil CO₂ concentration, oxygen (O₂) levels, enzyme activities, and labile carbon/nitrogen indicators across suburban wasteland, forestland, and grassland ecosystems from March 2023 to February 2024. The results revealed that the grassland had the highest average annual CO₂ concentration, followed by the forest, with the wasteland having the lowest. The subsurface soil CO₂ concentration of each ecosystem was higher than that of surface layer. The soil CO₂ concentration of the three ecosystems was high in summer and low in winter, and was in the middle in spring and autumn. There were disparities in soil physical and chemical properties, carbon and nitrogen contents, and hydrolase activities among different ecosystems. In all ecosystems, the soil CO₂ concentration increased exponentially with rises in air temperature, soil temperature and water content, yet displayed an exponential negative correlation with oxygen concentration.

Key words: urban-fringe ecosystem, soil CO₂, seasonal variation, soil hydrolase

苏晓曼, 郭淑文, 李宏博, 卢巧改, 吕佳宝, 李芳. 城郊荒地–林地–草地生态系统土壤CO₂浓度的差异、季节变化及其影响因素[J]. 北京大学学报（自然科学版）, 2025, 61(6): 1188-1200.

SU Xiaoman, GUO Shuwen, LI Hongbo, LU Qiaogai, Lü Jiabao, LI Fang.

Differences, Seasonal Variations and Influencing Factors of Soil CO₂ Concentration in Suburban Wasteland-Forestland-Grassland Ecosystems

[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2025, 61(6): 1188-1200.

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链接本文: https://xbna.pku.edu.cn/CN/10.13209/j.0479-8023.2025.107

https://xbna.pku.edu.cn/CN/Y2025/V61/I6/1188

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城郊荒地–林地–草地生态系统土壤CO₂浓度的差异、季节变化及其影响因素

Differences, Seasonal Variations and Influencing Factors of Soil CO₂ Concentration in Suburban Wasteland-Forestland-Grassland Ecosystems

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