Stoichiometrical regulation of soil organic matter decomposition and its temperature sensitivity
He, NP; Yu, GR
2016
Source PublicationECOLOGY AND EVOLUTION
ISSN2045-7758
Volume6Issue:2Pages:620-627
AbstractThe decomposition of soil organic matter (SOM) can be described by a set of kinetic principles, environmental constraints, and substrate supply. Here, we hypothesized that SOM decomposition rates (R) and its temperature sensitivity (Q(10)) would increase steadily with the N:C ratios of added substrates by alleviating N limitation on microbial growth. We tested this hypothesis by investigating SOM decomposition in both grassland and forest soils after addition of substrates with a range of N:C ratios. The results showed that Michaelis-Menten equations well fit the response of R to the N:C ratio variations of added substrates, and their coefficients of determination (R-2) ranged from 0.65 to 0.89 (P<0.01). Moreover, the maximal R, Q(10), and cumulative C emission of SOM decomposition increased exponentially with the N:C ratios of added substrates, and were controlled interactively by incubation temperature and the N:C ratios of the added substrates. We demonstrated that SOM decomposition rate and temperature sensitivity were exponentially correlated to substrate stoichiometry (N:C ratio) in both grassland and forest soils. Therefore, these correlations should be incorporated into the models for the prediction of SOM decomposition rate under warmer climatic scenarios.
SubtypeJournal
KeywordC:N ratio heterotrophic respiration kinetic models mineralization Q (10) substrate quality warming
Subject AreaEnvironmental Sciences & Ecology ; Evolutionary Biology
WOS Subject ExtendedEcology ; Evolutionary Biology
WOS KeywordMICROBIAL RESPONSE ; NORTHERN CHINA ; LEAF-LITTER ; NITROGEN ; CARBON ; PLANT ; RESPIRATION ; FOREST ; MODEL ; DEPENDENCE
Indexed BySCI
Language英语
WOS IDWOS:000369164400020
PublisherWILEY-BLACKWELL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44317
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
He, NP,Yu, GR. Stoichiometrical regulation of soil organic matter decomposition and its temperature sensitivity[J]. ECOLOGY AND EVOLUTION,2016,6(2):620-627.
APA He, NP,&Yu, GR.(2016).Stoichiometrical regulation of soil organic matter decomposition and its temperature sensitivity.ECOLOGY AND EVOLUTION,6(2),620-627.
MLA He, NP,et al."Stoichiometrical regulation of soil organic matter decomposition and its temperature sensitivity".ECOLOGY AND EVOLUTION 6.2(2016):620-627.
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