Forest conversion effect on soil nitrogen transformation and nitrous oxide emissions worldwide

文献类型： 外文期刊

第一作者： Xiao, Zhenggao

作者： Xiao, Zhenggao;Yang, Shuting;Zhu, Tongbin;Xiao, Zhenggao;Wang, Xie;Meng, Lei;Elrys, Ahmed S.;Zhu, Tongbin;Mueller, Christoph;Mueller, Christoph;Elrys, Ahmed S.;Xiao, Zhenggao;Zhu, Tongbin

作者机构：

关键词： Forest management; Nitrogen pollution; N 2 O emissions; Soil nitrogen transformation; Meta-analysis; Machine learning

期刊名称：GEODERMA （ 影响因子：6.6； 五年影响因子：7.3 ）

ISSN： 0016-7061

年卷期： 2025 年 459 卷

页码：

收录情况： SCI

摘要： Understanding soil nitrogen (N) storage and loss following forest conversion is crucial to evaluate land resource utilization and environmental impacts. However, forest conversion altering soil N dynamics and nitrous oxide (N2O) emissions and their driving factors remain largely unknown. Here, we conducted a global meta-analysis of 97 published papers to evaluate the effect of forest conversion (e.g., conversion of primary forests to secondary forests, managed plantations, grasslands, or croplands) on soil N transformations and N2O emissions. We found that forest conversion decreased gross N mineralization and ammonium concentration due to reduced soil microbial biomass, total carbon, and total N. Conversely, forest conversion overall increased autotrophic nitrification and N2O emissions due to the increased ammonia-oxidizing bacteria and archaea abundances. Primary forest converting to croplands and plantations notably increased soil N2O emissions in temperate and tropical zones. Structural equation model showed that increased ammonium and nitrate levels, and decreased total carbon were the main factors inducing soil N2O emissions in unfertilized ecosystems, while the increased nitrate was a key factor inducing soil N2O emissions in fertilized ecosystems. Altogether, our results suggest that forest conversion overall limits soil N storage while stimulating N2O emissions, highlighting the importance of conserving primary forests to reduce N losses and the negative impacts on the environment.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序