Stoichiometrical regulation of soil organic matter decomposition and its temperature sensitivity
文献类型：SCI/SSCI论文
| 作者 | He N. P.; Yu, G. R. |
| 发表日期 | 2016 |
| 关键词 | C:N ratio heterotrophic respiration kinetic models mineralization Q (10) substrate quality warming microbial response northern china leaf-litter nitrogen carbon plant respiration forest model dependence |
| 英文摘要 | The 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. |
| 出处 | Ecology and Evolution |
| 卷 | 6 |
| 期 | 2 |
| 页 | 620-627 |
| 语种 | 英语 |
| ISSN号 | 2045-7758 |
| DOI标识 | 10.1002/ece3.1927 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/42976]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | He N. P.,Yu, G. R.. Stoichiometrical regulation of soil organic matter decomposition and its temperature sensitivity. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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