Soil respiration in Chinese tea gardens: autotrophic and heterotrophic respiration
Soil respiration in Chinese tea gardens: autotrophic and heterotrophic respiration
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DOI：
10.1111/ejss.12670
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发表时间：
2018-07
影响因子：
4.2
通讯作者：
L. Fan;W. Han
中科院分区：
文献类型：
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作者：
L. Fan;W. Han
为了更好地了解土壤呼吸（RS）对土壤温度和含水量的响应，我们于2013年在中国茶园中使用了一种沟处理，可以将RS分为自养（RA）和异养呼吸（RH）组分。RH和RA与土壤温度和含水量的线性和非线性关系的结果表明，温度而不是含水量是控制中国茶园RH和RA季节性的主要因素。14个考虑土壤温度或水分的模型对相对湿度和相对湿度的比值拟合较好。土壤温度-水分指数模型比单因子模型能更好地解释相对湿度和相对湿度的季节变化。RH和RA之间的温度敏感性（Q10）值没有显着差异。茶园中RA对RS的相对贡献率为50- 63%。这项研究将有助于发展模式，调查在一般土壤呼吸的组成部分，也提高了我们的理解，这些组成部分对土壤温度和湿度的反应。
To obtain an improved understanding of the response of soil respiration (RS) to soil temperature and water content, we used a trenching treatment that could divide RS into autotrophic (RA) and heterotrophic respiration (RH) components in Chinese tea gardens in 2013. The results of the linear and non‐linear relations of RH and RA with soil temperature and water content showed that temperature rather than water content was the main factor controlling the seasonality of RH and RA in Chinese tea gardens. The rates of RH and RA were fitted well in 14 models that took soil temperature or water content into account. Exponential models of soil temperature–moisture could explain the seasonal variation in RH and RA better than the single‐factor models. Temperature sensitivity (Q10) values between RH and RA were not significantly different. The relative contribution (RC) of RA to RS in the tea gardens was 50–63%. This study will facilitate the development of models to investigate components of respiration in soil in general, and also improve our understanding of the response of these components to soil temperature and moisture.