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DOI | 10.1007/s11270-019-4144-7 |
Pathways Regulating Decreased Soil Respiration with Nitrogen Addition in a Subtropical Forest in China | |
Liang, Lizhuang; Chen, Feng; Han, Hairong; Zhang, Yanru; Zhu, Jiang; Niu, Shukui | |
发表日期 | 2019 |
ISSN | 0049-6979 |
EISSN | 1573-2932 |
卷号 | 230期号:4 |
英文摘要 | Knowledge of nitrogen (N) impacts on soil respiration (R-s) and its components is critical to assess soil carbon (C) storage and C stability with accumulating N deposition. However, the abiotic and biotic mechanisms underlying the responses of R-s and its components to N enrichment are still far from clear. This study investigated the direct and indirect pathways of N enrichment on autotrophic respiration (R-a) and heterotrophic respiration (R-h) in a subtropical forest. The results showed that N addition significantly decreased R-s across the 2-year observation. The negative effects of N fertilization on R-s were the combination of suppressive effects of excessive N on R-a and R-h. On average, N enrichment decreased R-s, R-a, and R-h by 34%, 33%, and 35%, respectively across the 2years. The decrease in R-a was directly due to reducing fine root biomass and indirectly affected by N-induced soil acidification. The decline in R-h was directly controlled by reducing soil microbial biomass C and indirectly determined by N-induced soil acidification and the elevation of soil N availability. Nitrogen addition significantly increased temperature sensitivities of R-s and its components, suggesting a potential positive C-climate feedback in the future scenarios of global warming and aggravating N deposition. Our study highlights the direct and indirect pathways of N fertilization on soil respiration and its components, which could have implications for assessing forest C sequestration and C stability. |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources |
来源期刊 | WATER AIR AND SOIL POLLUTION
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/95383 |
作者单位 | Beijing Forestry Univ, Key Lab Forest Resources & Ecosyst Proc Beijing, Beijing 100083, Peoples R China |
推荐引用方式 GB/T 7714 | Liang, Lizhuang,Chen, Feng,Han, Hairong,et al. Pathways Regulating Decreased Soil Respiration with Nitrogen Addition in a Subtropical Forest in China[J],2019,230(4). |
APA | Liang, Lizhuang,Chen, Feng,Han, Hairong,Zhang, Yanru,Zhu, Jiang,&Niu, Shukui.(2019).Pathways Regulating Decreased Soil Respiration with Nitrogen Addition in a Subtropical Forest in China.WATER AIR AND SOIL POLLUTION,230(4). |
MLA | Liang, Lizhuang,et al."Pathways Regulating Decreased Soil Respiration with Nitrogen Addition in a Subtropical Forest in China".WATER AIR AND SOIL POLLUTION 230.4(2019). |
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