Nitrate promotes straw decomposition, microbial necromass accumulation and stability of mineral-associated organic carbon at molecular compositional level more significantly than ammonium
文献类型：期刊论文
| 作者 | Dai, Weijie2,3; Xiao, Rongbo1; Yang, Fen2; Wei, Chaoyang2 |
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2026-02-21 |
| 卷号 | N/A |
| 关键词 | Inorganic nitrogen forms Soil respiration Microbial necromass Molecular composition and diversity |
| ISSN号 | 0032-079X |
| DOI | 10.1007/s11104-026-08416-8 |
| 产权排序 | 1 |
| 文献子类 | Article ; Early Access |
| 英文摘要 | AimsStraw decomposition may contribute to the accumulation of relatively stable soil organic carbon pools including microbial necromass carbon (MNC) and mineral-associated organic carbon (MAOC). However, little is known how inorganic nitrogen forms i.e. nitrate and ammonium impact the mechanisms regarding straw decomposition, MNC accumulation as well as MAOC stability in terms of its molecular composition and diversity.MethodsWheat straw was co-added with 50 mg N kg-1 (low) or 150 mg N kg-1 (high) of either nitrate or ammonium in a 90-day indoor experiment. The dynamic changes in soil respiration, particular organic carbon (POC), MNC and MAOC were monitored, and the molecular composition of MAOC were characterized using pyrolysis gas chromatography-mass spectrometry (Py-GCMS).ResultsNitrate could promote straw decomposition and MNC accumulation more significantly than ammonium due to the higher microbial utilization i.e. less N2O emission. Compared with CK, high concentration of nitrate with straw resulted in the greatest increase in soil CO2-C emission by 12.7 times and total MNC by 64.8%. Compared with straw addition alone, nitrate with straw significantly promoted the decomposition of relatively unstable POC by 41.8% without affecting MAOC accumulation. MAOC molecular composition and diversity were altered more by nitrate than by ammonium. Nitrate decreased the relative abundance of plant-derived phenolic compounds, but increased that of aromatic compounds more prominently than ammonium, facilitating microbial oxidation and the persistence of MAOC.ConclusionsThis study highlights the advantages of nitrate co-added with straw in enhancing MNC accumulation as well as MAOC stability from its molecular composition aspect. |
| URL标识 | 查看原文 |
| WOS关键词 | TURNOVER |
| WOS研究方向 | Agriculture ; Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001695940300001 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/220979]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Yang, Fen |
| 作者单位 | 1.Guangdong Univ Finance & Econ, Sch Geog & Environm Econ, Guangzhou 510320, Peoples R China 2.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Dai, Weijie,Xiao, Rongbo,Yang, Fen,et al. Nitrate promotes straw decomposition, microbial necromass accumulation and stability of mineral-associated organic carbon at molecular compositional level more significantly than ammonium[J]. PLANT AND SOIL,2026,N/A. |
| APA | Dai, Weijie,Xiao, Rongbo,Yang, Fen,&Wei, Chaoyang.(2026).Nitrate promotes straw decomposition, microbial necromass accumulation and stability of mineral-associated organic carbon at molecular compositional level more significantly than ammonium.PLANT AND SOIL,N/A. |
| MLA | Dai, Weijie,et al."Nitrate promotes straw decomposition, microbial necromass accumulation and stability of mineral-associated organic carbon at molecular compositional level more significantly than ammonium".PLANT AND SOIL N/A(2026). |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。