Response of soil organic carbon stocks and soil microbial biomass carbon to natural grassland conversion: A global meta-analysis

被引：0
作者：
Cai, Yijun [1 ,2 ]
Yang, Yuwen [1 ]
Jiang, Jinlin [1 ]
Long, Tao [1 ]
Gu, Xueyuan [2 ]
Guo, Yang [1 ]
Li, Ming [1 ]
Xie, Yufeng [1 ]
机构：
[1] Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing
[2] State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing
来源：
Science of the Total Environment | 2025年 / 965卷
关键词：
Meta-analysis; Natural grassland conversion; Soil microbial biomass; Soil organic carbon stocks;
D O I：
10.1016/j.scitotenv.2025.178481
中图分类号：
学科分类号：
摘要：
Natural grasslands worldwide are increasingly being converted into other land-use types, such as cropland and forest, thereby impacting soil carbon cycles and stocks. Soil organic carbon (SOC) is essential for regulating soil properties and microbial communities, while microbial biomass carbon (MBC) is the most active fraction of the SOC pool, both of which play pivotal roles in the global carbon cycle. Here, we performed a meta-analysis on 623 and 85 individual observations from 85 peer-reviewed articles to quantitatively evaluate the effect of grassland conversion on SOCS and MBC. Overall, conversions significantly reduced SOCS and MBC by 10.11 % and 30.63 %, respectively. Notably, the impact varied by conversion type: converting grassland to forest, cropland, and plantation reduced SOCS by 7.69 %, 16.47 %, and 20.55 %, respectively. Meanwhile, converting grassland to cropland and abandoned land decreased MBC by 47.80 % and 38.74 %, respectively. Environmental factors such as mean annual temperature (MAT), mean annual precipitation (MAP), soil total nitrogen (TN), and soil carbon-to‑nitrogen ratio (C/N) influenced these changes. SOCS and MBC were positively correlated with MAT, soil C/N and TN. Specifically, when the C/N or TN of the converted soil exceeded 1.21 or 1.11 times that of the original grassland, SOCS would exhibit a trend of carbon sequestration. Our findings provide valuable insights for global soil carbon sequestration and land use management policies. © 2025
引用
收藏
相关论文
共 119 条
[1]  
Albaladejo J., Ortiz R., Garcia-Franco N., Navarro A.R., Almagro M., Pintado J.G., Martinez-Mena M., Land use and climate change impacts on soil organic carbon stocks in semi-arid Spain, J. Soil. Sediment., 13, pp. 265-277, (2013)
[2]  
Anderson T.H., Domsch K.H., Application of ecophysiological quotients (QCO2 and QD) on microbial biomasses from soils of different cropping histories, Soil Biol. Biochem., 22, pp. 251-255, (1990)
[3]  
Auffret A.G., Kimberley A., Plue J., Walden E., Super-regional land-use change and effects on the grassland specialist flora, Nat. Commun., 9, (2018)
[4]  
Bai Y.F., Cotrufo M.F., Grassland soil carbon sequestration: current understanding, challenges, and solutions, Science, 377, pp. 603-608, (2022)
[5]  
Baker J.M., Ochsner T.E., Venterea R.T., Griffis T.J., Tillage and soil carbon sequestration - what do we really know?, Agr Ecosyst Environ, 118, pp. 1-5, (2007)
[6]  
Balesdent J., Besnard E., Arrouays D., Chenu C., The dynamics of carbon in particle-size fractions of soil in a forest-cultivation sequence, Plant and Soil, 201, pp. 49-57, (1998)
[7]  
Barbhuiya A.R., Arunachalam A., Pandey H.N., Arunachalam K., Khan M.L., Nath P.C., Dynamics of soil microbial biomass C, N and P in disturbed and undisturbed stands of a tropical wet-evergreen forest, Eur. J. Soil Biol., 40, pp. 113-121, (2004)
[8]  
Barcena T.G., Kiaer L.P., Vesterdal L., Stefansdottir H.M., Gundersen P., Sigurdsson B.D., Soil carbon stock change following afforestation in Northern Europe: a meta-analysis, Glob. Chang. Biol., 20, pp. 2393-2405, (2014)
[9]  
Beare M.H., Cabrera M.L., Hendrix P.F., Coleman D.C., Aggregate-protected and unprotected organic-matter pools in conventional-tillage and no-tillage soils, Soil Sci. Soc. Am. J., 58, pp. 787-795, (1994)
[10]  
Beillouin D., Cardinael R., Berre D., Boyer A., Corbeels M., Fallot A., Feder F., Demenois J., A global overview of studies about land management, land-use change, and climate change effects on soil organic carbon, Glob. Chang. Biol., 28, pp. 1690-1702, (2022)
12345678910