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12 October 2017 Responses of soil respiration to warming vary between growing season and non-growing season in a mountain forest of southwestern China
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Abstract

Understanding the temperature sensitivity of soil respiration is very important to quantify the climate–carbon cycle feedback. Most existing studies have only focused on responses of growing-season respiration to warming. Soil respiration of non-growing season may be more sensitive to warming. However, to our knowledge, this hypothesis remains poorly understood. An experiment was conducted in a mountain pine forest of southwestern China to compare the sensitivity of soil respiration to warming ( 5 °C) between growing and non-growing seasons. Experimental warming decreased soil moisture but increased soil respiration on most of the measuring dates. Warming-caused increase in soil respiration and Q10 value was greater during the growing season than during the non-growing season. Q10 values decreased linearly with warming-induced changes in soil moisture. This study provides preliminary evidence that soil respiration of non-growing season is less sensitive to warming compared with that of growing season in the mountain forests experiencing monsoon climate.

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Zhenfeng Xu, Huajun Yin, Chunzhang Zhao, Pei Xiong, and Qing Liu "Responses of soil respiration to warming vary between growing season and non-growing season in a mountain forest of southwestern China," Canadian Journal of Soil Science 98(1), 70-76, (12 October 2017). https://doi.org/10.1139/cjss-2017-0036
Received: 22 March 2017; Accepted: 1 September 2017; Published: 12 October 2017
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