Effects of Precipitation Increase on Soil Respiration: A Three-Year Field Experiment in Subtropical Forests in China

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	Effects of Precipitation Increase on Soil Respiration: A Three-Year Field Experiment in Subtropical Forests in China
	Hui, Dafeng; Deng, Qi; Zhang, Deqiang; Zhou, Guoyi; Liu, Juxiu; Liu, Shizhong; Chu, Guowei; Li, Jiong
刊名	PLOS ONE
	2012
英文摘要	Background: The aim of this study was to determine response patterns and mechanisms of soil respiration to precipitation increases in subtropical regions. Methodology/Principal Findings: Field plots in three typical forests [i.e. pine forest (PF), broadleaf forest (BF), and pine and broadleaf mixed forest (MF)] in subtropical China were exposed under either Double Precipitation (DP) treatment or Ambient Precipitation (AP). Soil respiration, soil temperature, soil moisture, soil microbial biomass and fine root biomass were measured over three years. We tested whether precipitation treatments influenced the relationship of soil respiration rate (R) with soil temperature (T) and soil moisture (M) using R=(a+cM)exp(bT), where a is a parameter related to basal soil respiration; b and c are parameters related to the soil temperature and moisture sensitivities of soil respiration, respectively. We found that the DP treatment only slightly increased mean annual soil respiration in the PF (15.4%) and did not significantly change soil respiration in the MF and the BF. In the BF, the increase in soil respiration was related to the enhancements of both soil fine root biomass and microbial biomass. The DP treatment did not change model parameters, but increased soil moisture, resulting in a slight increase in soil respiration. In the MF and the BF, the DP treatment decreased soil temperature sensitivity b but increased basal soil respiration a, resulting in no significant change in soil respiration. Conclusion/Significance: Our results indicate that precipitation increasing in subtropical regions in China may have limited effects on soil respiration.
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/754]
专题	中国科学院武汉植物园
推荐引用方式 GB/T 7714	Hui, Dafeng,Deng, Qi,Zhang, Deqiang,et al. Effects of Precipitation Increase on Soil Respiration: A Three-Year Field Experiment in Subtropical Forests in China[J]. PLOS ONE,2012.
APA	Hui, Dafeng.,Deng, Qi.,Zhang, Deqiang.,Zhou, Guoyi.,Liu, Juxiu.,...&Li, Jiong.(2012).Effects of Precipitation Increase on Soil Respiration: A Three-Year Field Experiment in Subtropical Forests in China.PLOS ONE.
MLA	Hui, Dafeng,et al."Effects of Precipitation Increase on Soil Respiration: A Three-Year Field Experiment in Subtropical Forests in China".PLOS ONE (2012).