A global synthesis of the rate and temperature sensitivity of soil nitrogen mineralization: latitudinal patterns and mechanisms
Liu, Y; Wang, CH; He, NP; Wen, XF; Gao, Y; Li, SG; Niu, SL; Butterbach-Bahl, K; Luo, YQ; Yu, GR
2017
Source PublicationGLOBAL CHANGE BIOLOGY
ISSN1354-1013
Volume23Issue:1Pages:455-464
AbstractSoil net nitrogen (N) mineralization (N-min) is a pivotal process in the global N cycle regulating the N availability of plant growth. Understanding the spatial patterns of N-min, its temperature sensitivity (Q(10)) 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 N-min and the Q(10) of N-min varied among different ecosystems and regions at the global scale. The results showed that N-min varied significantly among different ecosystems with a global average of 2.41 mg N soil kg(-1) day(-1). Furthermore, N-min significantly decreased with increasing latitude and altitude. The Q(10) 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 N-min was primarily affected by the content of soil organic carbon (C), soil C:N ratio, and clay content, where Q(10) was primarily influenced by the soil C:N ratio and soil pH. Furthermore, the activation energy (E-a) 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 Q(10). This may alleviate the restriction of N supply for increased primary productivity at higher latitudes.
SubtypeJournal
Keywordactivation energy global pattern mechanism mineralization nitrogen availability substrate quality temperature sensitivity
Subject AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS Subject ExtendedBiodiversity Conservation ; Ecology ; Environmental Sciences
WOS KeywordORGANIC-MATTER DECOMPOSITION ; MICROBIAL BIOMASS CARBON ; N-MINERALIZATION ; TERRESTRIAL ECOSYSTEMS ; NORTHERN CHINA ; RESPIRATION ; PHOSPHORUS ; LIMITATION ; WATER ; DEPENDENCE
Indexed BySCI
Language英语
WOS IDWOS:000390218300038
PublisherWILEY-BLACKWELL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44137
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Liu, Y,Wang, CH,He, NP,et al. A global synthesis of the rate and temperature sensitivity of soil nitrogen mineralization: latitudinal patterns and mechanisms[J]. GLOBAL CHANGE BIOLOGY,2017,23(1):455-464.
APA Liu, Y.,Wang, CH.,He, NP.,Wen, XF.,Gao, Y.,...&Yu, GR.(2017).A global synthesis of the rate and temperature sensitivity of soil nitrogen mineralization: latitudinal patterns and mechanisms.GLOBAL CHANGE BIOLOGY,23(1),455-464.
MLA Liu, Y,et al."A global synthesis of the rate and temperature sensitivity of soil nitrogen mineralization: latitudinal patterns and mechanisms".GLOBAL CHANGE BIOLOGY 23.1(2017):455-464.
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