Responses of soil greenhouse gas emissions to land use conversion and reversion—A global meta‐analysis

作者：Zhaohui Feng, Lingqing Wang, Xiaoming Wan, Jun Yang, Qin Peng, Tao Liang, Yazhu Wang, Buqing Zhong, Jörg Rinklebe · 发表于：Global Change Biology · 年份：2022 · DOI：10.1111/gcb.16370 · 被引用次数：47 · 研究领域：Fire effects on ecosystems、Soil Carbon and Nitrogen Dynamics、Atmospheric and Environmental Gas Dynamics

Abstract Exploring the responses of greenhouse gas (GHG) emissions to land use conversion or reversion is significant for taking effective land use measures to alleviate global warming. A global meta‐analysis was conducted to analyze the responses of carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) emissions to land use conversion or reversion, and determine their temporal evolution, driving factors, and potential mechanisms. Our results showed that CH 4 and N 2 O responded positively to land use conversion while CO 2 responded negatively to the changes from natural herb and secondary forest to plantation. By comparison, CH 4 responded negatively to land use reversion and N 2 O also showed negative response to the reversion from agricultural land to forest. The conversion of land use weakened the function of natural forest and grassland as CH 4 sink and the artificial nitrogen (N) addition for plantation increased N source for N 2 O release from soil, while the reversion of land use could alleviate them to some degree. Besides, soil carbon would impact CO 2 emission for a long time after land use conversion, and secondary forest reached the CH 4 uptake level similar to that of primary forest after over 40 years. N 2 O responses had negative relationships with time interval under the conversions from forest to plantation, secondary forest, and pasture. In addition, meta‐regression indicated that CH 4 had correlations with several environmental variables, and ...