| DOI: | 10.1111/gcb.14557
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| Scopus记录号: | 2-s2.0-85060174093
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| 论文题名: | Microbes drive global soil nitrogen mineralization and availability |
| 作者: | Li Z.; Tian D.; Wang B.; Wang J.; Wang S.; Chen H.Y.H.; Xu X.; Wang C.; He N.; Niu S.
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| 刊名: | Global Change Biology
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| ISSN: | 13541013
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| 出版年: | 2019
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| 卷: | 25, 期:3 | | 起始页码: | 1078
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| 结束页码: | 1088
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| 语种: | 英语
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| 英文关键词: | croplands
; dominant factor
; microbial biomass
; natural ecosystems
; nitrogen availability
; nitrogen mineralization
; soil properties
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| 英文摘要: | Soil net nitrogen mineralization rate (N min ), which is critical for soil nitrogen availability and plant growth, is thought to be primarily controlled by climate and soil physical and/or chemical properties. However, the role of microbes on regulating soil N min has not been evaluated on the global scale. By compiling 1565 observational data points of potential net N min from 198 published studies across terrestrial ecosystems, we found that N min significantly increased with soil microbial biomass, total nitrogen, and mean annual precipitation, but decreased with soil pH. The variation of N min was ascribed predominantly to soil microbial biomass on global and biome scales. Mean annual precipitation, soil pH, and total soil nitrogen significantly influenced N min through soil microbes. The structural equation models (SEM) showed that soil substrates were the main factors controlling N min when microbial biomass was excluded. Microbe became the primary driver when it was included in SEM analysis. SEM with soil microbial biomass improved the N min prediction by 19% in comparison with that devoid of soil microbial biomass. The changes in N min contributed the most to global soil NH 4 + -N variations in contrast to climate and soil properties. This study reveals the complex interactions of climate, soil properties, and microbes on N min and highlights the importance of soil microbial biomass in determining N min and nitrogen availability across the globe. The findings necessitate accurate representation of microbes in Earth system models to better predict nitrogen cycle under global change. © 2018 John Wiley & Sons Ltd |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/117479
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
Li Z.,Tian D.,Wang B.,et al. Microbes drive global soil nitrogen mineralization and availability[J]. Global Change Biology,2019-01-01,25(3)
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