Divergent effects of straw and straw-derived biochar on soil N transformation and N2O emissions: a global meta-analysis
文献类型：期刊论文
| 作者 | Wang, Hui1,2; Guo, Yifan1,2; Fang, Huajun1,2,3; Cheng, Shulan1; Shi, Fangying1,2; Chen, Long1; Pu, Haiguang1,2; Liu, Bingqian1 |
| 刊名 | JOURNAL OF ENVIRONMENTAL MANAGEMENT
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 395 |
| 关键词 | Straw Straw-derived biochar N transformation N 2 O emissions Meta-analysis |
| ISSN号 | 0301-4797 |
| DOI | 10.1016/j.jenvman.2025.127784 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Excessive application of inorganic fertilizers releases reactive nitrogen (N), threatening global ecological sustainability. Returning straw to the field has been recognized as an effective strategy to regulate N dynamics. However, it remains unclear whether direct straw application or its conversion into biochar is more effective in promoting N retention, enhancing N supply, and reducing nitrous oxide (N2O) emissions. In this study, we conducted a meta-analysis of 1477 paired observations from 378 publications to compare the impacts of straw and straw-derived biochar on soil N transformation and N2O emissions across various agroecosystems. Straw generally outperforms straw-derived biochar in boosting soil N availability and retention. Specifically, straw significantly enhances N mineralization (54.4 %-60.7 %) and NH4+ immobilization (116.0 %-128.8 %), while reducing autotrophic nitrification in paddy soils (-28.3 %). The effect of straw on N2O emissions varies by agroecosystem, with a marked increase in upland soils (+76.4 %) but a decrease in paddy fields (-12.2 %). In contrast, biochar consistently reduces N2O emissions in both upland (-28.8 %) and paddy (-27.5 %) systems. Further analysis revealed that high-dose rice straw biochar (pH > 8, C/N > 100) is most effective in upland soils, while straw with a high C/N ratio is most beneficial for reducing N2O emissions in paddy soils, except under conditions of high SOC, TN, and C/N ratios. Overall, these findings provide scientific evidence to choose condition-specific management practices for improving agricultural N use efficiency and mitigating climate change. |
| URL标识 | 查看原文 |
| WOS关键词 | NITROUS-OXIDE EMISSIONS ; WHEAT-STRAW ; NITRATE ; AMMONIUM ; REDUCTION ; AMENDMENT ; RATIOS ; GENES |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001612769700008 |
| 出版者 | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/217722]  |
| 专题 | 千烟洲站森林生态系统研究中心_外文论文 |
| 通讯作者 | Guo, Yifan; Fang, Huajun |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; 2.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 3.Zhongke Jian Inst Ecoenvironm Sci, Jian 343000, Peoples R China; 11A,Datun Rd,Chaoyang Dist, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Hui,Guo, Yifan,Fang, Huajun,et al. Divergent effects of straw and straw-derived biochar on soil N transformation and N2O emissions: a global meta-analysis[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2025,395. |
| APA | Wang, Hui.,Guo, Yifan.,Fang, Huajun.,Cheng, Shulan.,Shi, Fangying.,...&Liu, Bingqian.(2025).Divergent effects of straw and straw-derived biochar on soil N transformation and N2O emissions: a global meta-analysis.JOURNAL OF ENVIRONMENTAL MANAGEMENT,395. |
| MLA | Wang, Hui,et al."Divergent effects of straw and straw-derived biochar on soil N transformation and N2O emissions: a global meta-analysis".JOURNAL OF ENVIRONMENTAL MANAGEMENT 395(2025). |
入库方式： OAI收割
来源：地理科学与资源研究所
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