Influence of interactions between litter decomposition and rhizosphere activity on soil respiration and on the temperature sensitivity in a subtropical montane forest in SW China
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- 作者：Chuansheng Wu (1) (2) (3) (4)
Yiping Zhang (1) (2) (3)
Xingliang Xu (5)
Liqing Sha (1) (2) (3)
Guangyong You (6)
Yuhong Liu (1) (2) (3)
Youneng Xie (7) - 关键词：Q 10 ; Root respiration ; Litter respiration ; Soil organic matter decomposition ; Soil respiration
- 刊名：Plant and Soil
- 出版年：2014
- 出版时间：August 2014
- 年：2014
- 卷：381
- 期：1-2
- 页码：215-224
- 全文大小：659 KB
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Yiping Zhang (1) (2) (3)
Xingliang Xu (5)
Liqing Sha (1) (2) (3)
Guangyong You (6)
Yuhong Liu (1) (2) (3)
Youneng Xie (7)
1. Key laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, 666303, China
2. Ailaoshan Station for Subtropical Forest Ecosystem Studies, Jingdong, 676209, China
3. National Forest Ecosystem Research Station at Ailaoshan, Jingdong, 676209, China
4. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China
5. Key laboratory of Ecosystem Network Observation and Modelling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
6. Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing, 210042, China
7. Jingdong Bureau of National Nature Reserve, Jingdong, Yunnan, 676209, China - ISSN：1573-5036
文摘
Aims The aims were to identify the effects of interactions between litter decomposition and rhizosphere activity on soil respiration and on the temperature sensitivity of soil respiration in a subtropical forest in SW China. Methods Four treatments were established: control (CK), litter removal (NL), trenching (NR) and trenching together with litter removal (NRNL). Soil CO2 efflux, soil temperature, and soil water content were measured once a month over two years. Soil respiration was divided into four components: the decomposition of basic soil organic matter (SOM), litter respiration, root respiration, and the interaction effect between litter decomposition and rhizosphere activity. A two-factor regression equation was used to correct the value of soil CO2 efflux. Results We found a significant effect of the interaction between litter decomposition and rhizosphere activity (R INT) on total soil respiration, and R INT exhibited significant seasonal variation, accounting for 26 and 31?% of total soil respiration in the dry and rainy seasons, respectively. However, we found no significant interaction effect on the temperature sensitivity of soil respiration. The temperature sensitivity was significantly increased by trenching compared with the control, but was unchanged by litter removal. Conclusions Though the interaction between litter decomposition and rhizosphere activity had no effects on temperature sensitivity, it had a significant positive effect on soil respiration. Our results not only showed strong influence of rhizosphere activity on temperature sensitivity, but provided a viable way to identify the contribution of SOM to soil respiration, which could help researchers gain insights on the carbon cycle.