Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14009 |
Nitrogen-rich microbial products provide new organo-mineral associations for the stabilization of soil organic matter | |
Kopittke, Peter M.1; Hernandez-Soriano, Maria C.1; Dalal, Ram C.1; Finn, Damien1; Menzies, Neal W.1; Hoeschen, Carmen2; Mueller, Carsten W.2 | |
2018-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:4页码:1762-1770 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; Germany |
英文摘要 | Understanding the cycling of C and N in soils is important for maintaining soil fertility while also decreasing greenhouse gas emissions, but much remains unknown about how organic matter (OM) is stabilized in soils. We used nano-scale secondary ion mass spectrometry (NanoSIMS) to investigate the changes in C and N in a Vertisol and an Alfisol incubated for 365days with C-13 and N-15 pulse labeled lucerne (Medicago sativa L.) to discriminate new inputs of OM from the existing soil OM. We found that almost all OM within the free stable microaggregates of the soil was associated with mineral particles, emphasizing the importance of organo-mineral interactions for the stabilization of C. Of particular importance, it was also found that N-15-rich microbial products originating from decomposition often sorbed directly to mineral surfaces not previously associated with OM. Thus, we have shown that N-rich microbial products preferentially attach to distinct areas of mineral surfaces compared to C-dominated moieties, demonstrating the ability of soils to store additional OM in newly formed organo-mineral associations on previously OM-free mineral surfaces. Furthermore, differences in N-15 enrichment were observed between the Vertisol and Alfisol presumably due to differences in mineralogy (smectite-dominated compared to kaolinite-dominated), demonstrating the importance of mineralogy in regulating the sorption of microbial products. Overall, our findings have important implications for the fundamental understanding of OM cycling in soils, including the immobilization and storage of N-rich compounds derived from microbial decomposition and subsequent N mineralization to sustain plant growth. |
英文关键词 | nano-scale secondary ion mass spectrometry organo-mineral interactions soil carbon cycling soil carbon storage stable isotopes |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426504400026 |
WOS关键词 | FOREST SOIL ; CARBON ; NANOSIMS ; STXM ; FRACTIONATION ; LIMITATIONS ; MECHANISMS ; PARTICLES ; STABILITY ; SURFACES |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17848 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Queensland, Sch Agr & Food Sci, St Lucia, Qld, Australia; 2.Tech Univ Munich, Lehrstuhl Bodenkunde, Freising Weihenstephan, Germany |
推荐引用方式 GB/T 7714 | Kopittke, Peter M.,Hernandez-Soriano, Maria C.,Dalal, Ram C.,et al. Nitrogen-rich microbial products provide new organo-mineral associations for the stabilization of soil organic matter[J]. GLOBAL CHANGE BIOLOGY,2018,24(4):1762-1770. |
APA | Kopittke, Peter M..,Hernandez-Soriano, Maria C..,Dalal, Ram C..,Finn, Damien.,Menzies, Neal W..,...&Mueller, Carsten W..(2018).Nitrogen-rich microbial products provide new organo-mineral associations for the stabilization of soil organic matter.GLOBAL CHANGE BIOLOGY,24(4),1762-1770. |
MLA | Kopittke, Peter M.,et al."Nitrogen-rich microbial products provide new organo-mineral associations for the stabilization of soil organic matter".GLOBAL CHANGE BIOLOGY 24.4(2018):1762-1770. |
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