globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13372
论文题名:
A global synthesis of the rate and temperature sensitivity of soil nitrogen mineralization: latitudinal patterns and mechanisms
作者: Liu Y.; Wang C.; He N.; Wen X.; Gao Y.; Li S.; Niu S.; Butterbach-Bahl K.; Luo Y.; Yu G.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:1
起始页码: 455
结束页码: 464
语种: 英语
英文关键词: activation energy ; global pattern ; mechanism ; mineralization ; nitrogen availability ; substrate quality ; temperature sensitivity
Scopus关键词: activation energy ; global warming ; mineralization ; nitrogen cycle ; nutrient availability ; soil nitrogen
英文摘要: Soil net nitrogen (N) mineralization (Nmin) is a pivotal process in the global N cycle regulating the N availability of plant growth. Understanding the spatial patterns of Nmin, its temperature sensitivity (Q10) and regulatory mechanisms is critical for improving the management of soil nutrients. In this study, we evaluated 379 peer-reviewed scientific papers to explore how Nmin and the Q10 of Nmin varied among different ecosystems and regions at the global scale. The results showed that Nmin varied significantly among different ecosystems with a global average of 2.41 mg N soil kg−1 day−1. Furthermore, Nmin significantly decreased with increasing latitude and altitude. The Q10 varied significantly among different ecosystems with a global average of 2.21, ranging from the highest found in forest soils (2.43) and the lowest found for grassland soils (1.67) and significantly increased with increasing latitude. Path analyses indicated that Nmin was primarily affected by the content of soil organic carbon (C), soil C:N ratio, and clay content, where Q10 was primarily influenced by the soil C:N ratio and soil pH. Furthermore, the activation energy (Ea) of soil N mineralization was significantly and negative correlated with the substrate quality index among all ecosystems, indicating the applicability of the carbon quality temperature hypothesis to soil N mineralization at a global scale. These findings provided empirical evidence supporting that soil N availability, under global warming scenarios, is expected to increase stronger in colder regions as compared with that low-latitude regions due to the higher Q10. This may alleviate the restriction of N supply for increased primary productivity at higher latitudes. © 2016 John Wiley & Sons Ltd
资助项目: Funding for this work came from the Natural Science Foundation of China (41571130043, 31270519, 31470506, 31290221), from the Program for Kezhen Distinguished Talents in Institute of Geographic Sciences and Natural Resources Research, CAS (2013RC102), and the Youth Innovation Promotion Association CAS.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61162
Appears in Collections:影响、适应和脆弱性

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作者单位: Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, The Chinese Academy of Sciences, Beijing, China; Institute of Meteorology and Climate Research, Atmospheric Environmental Research, Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany; Department of Microbiology & Plant Biology, University of Oklahoma, Norman, OK, United States

Recommended Citation:
Liu Y.,Wang C.,He N.,et al. A global synthesis of the rate and temperature sensitivity of soil nitrogen mineralization: latitudinal patterns and mechanisms[J]. Global Change Biology,2017-01-01,23(1)
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