Nitrogen deficiency accelerates soil organic carbon decomposition in temperate degraded grasslands
文献类型：期刊论文
| 作者 | Zeng, Wenjing4; Wang, Zhaodi2,4; Chen, Xinyue4; Yao, Xiaodong3,4; Ma, Zeqing; Wang, Wei4 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-07-10 |
| 卷号 | 881页码:163424 |
| ISSN号 | 0048-9697 |
| 关键词 | Labile carbon release Recalcitrant carbon release Nitrogen de ficiency Nitrogen enrichment Degraded grasslands Ion -exchange membrane |
| DOI | 10.1016/j.scitotenv.2023.163424 |
| 文献子类 | Article |
| 英文摘要 | The impacts of nitrogen (N) availability on soil organic carbon (SOC) decomposition were often explored based on N en-richment (N+) experiments. However, many natural and anthropogenic processes often reduce soil N availability. There is no direct evidence about how decreased N availability (N-) affects SOC decomposition, and the mechanisms of microbe-driven SOC decomposition in response to N availability remain unclear. Here, we used ion-exchange membranes to simulate N-. Soil samples from four temperate grassland sites, ranging from non-degradation to extreme degradation, were incubated with the N- and N+ treatments. We found that the total cumulative carbon (C) release was promoted by the N- treatment (8.60 to 87.30 mg C/g Cinital) but was inhibited by the N+ treatment (-129.81 to -16.49 mg C/g Cinital), regardless of the degradation status. N- dramatically increased recalcitrant C decomposition by increasing soil pH at all grassland sites; while did not affect or even decreased labile C decomposition by significantly increasing micro-bial C use efficiency and soil microbial biomass N. Interestingly, the effects of N- and N+ on SOC decomposition was asymmetric; with increased grassland degradation, the SOC decomposition was more sensitive to N- than to N+. Our results provide direct evidence for the different effects and mechanisms of N- on SOC decomposition and should be con-sidered in soil process models to better predict the response of the nutrient cycle to global changes. |
| 学科主题 | Environmental Sciences & Ecology |
| WOS关键词 | MATTER DECOMPOSITION ; MICROBIAL CARBON ; LIMITATION ; STOICHIOMETRY ; RESPIRATION ; RESISTANCE ; INCREASES ; LOSSES ; DECAY |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/193475]  |
| 专题 | 千烟洲站森林生态系统研究中心_外文论文 |
| 作者单位 | 1.Beijing Etown Acad, 12 Sihelu,Econ Technol Dev Area, Beijing 100176, Peoples R China 2.Fujian Normal Univ, Minist Sci & Technol & Fujian Prov, Sch Geog Sci, State Key Lab Subtrop Mt Ecol, Fuzhou, Peoples R China 3.Peking Univ, Minist Educ, Coll Urban & Environm Sci, Key Lab Earth Surface Proc,Dept Ecol, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Qianyanzhou Ecol Res Stn, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zeng, Wenjing,Wang, Zhaodi,Chen, Xinyue,et al. Nitrogen deficiency accelerates soil organic carbon decomposition in temperate degraded grasslands[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,881:163424. |
| APA | Zeng, Wenjing,Wang, Zhaodi,Chen, Xinyue,Yao, Xiaodong,Ma, Zeqing,&Wang, Wei.(2023).Nitrogen deficiency accelerates soil organic carbon decomposition in temperate degraded grasslands.SCIENCE OF THE TOTAL ENVIRONMENT,881,163424. |
| MLA | Zeng, Wenjing,et al."Nitrogen deficiency accelerates soil organic carbon decomposition in temperate degraded grasslands".SCIENCE OF THE TOTAL ENVIRONMENT 881(2023):163424. |
入库方式： OAI收割
来源：地理科学与资源研究所
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