The priming effect of soluble carbon inputs in organic and mineral soils from a temperate forest

doi:10.1007/s00442-015-3290-x

	The priming effect of soluble carbon inputs in organic and mineral soils from a temperate forest
	Dai, Weiwei 2; Wang, Hui 1,2; Xu, Wenhua 2; Bai, Edith 2; Hu, Guoqing 1,2; Jiang, Ping 2
刊名	OECOLOGIA
	2015-08-01
卷号	178 期号:4 页码:1239-1250
关键词	Soil Organic Carbon Mineralization Substrate Availability Nutrient Status Microbial Biomass Carbon Sequestration
ISSN号	0029-8549
DOI	10.1007/s00442-015-3290-x
英文摘要	The priming effect (PE) is one of the most important interactions between C input and output in soils. Here we aim to quantify patterns of PE in response to six addition rates of C-13-labeled water-soluble C (WSC) and determine if these patterns are different between soil organic and mineral layers in a temperate forest. Isotope mass balance was used to distinguish WSC derived from SOC-derived CO2 respiration. The relative PE was 1.1-3.3 times stronger in the mineral layer than in the organic layer, indicating higher sensitivity of the mineral layer to WSC addition. However, the magnitude of cumulative PE was significantly higher in the organic layer than in the mineral layer due to higher SOC in the organic layer. With an increasing WSC addition rate, cumulative PE increased for both layers, but tended to level off when the addition rate was higher than 400 mg C kg(-1) soil. This saturation effect indicates that stimulation of soil C loss by exogenous substrate would not be as drastic as the increase of C input. In fact, we found that the mineral layer with an WSC addition rate of 160-800 mg C kg(-1) soil had net C storage although positive PE was observed. The addition of WSC basically caused net C loss in the organic layer due to the high magnitude of PE, pointing to the importance of the organic layer in C cycling of forest ecosystems. Our findings provide a fundamental understanding of PE on SOC mineralization of forest soils and warrant further in situ studies of PE in order to better understand C cycling under global climate change.
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000358089400023
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/122109]
专题	中国科学院沈阳应用生态研究所
通讯作者	Bai, Edith
作者单位	1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Dai, Weiwei,Wang, Hui,Xu, Wenhua,et al. The priming effect of soluble carbon inputs in organic and mineral soils from a temperate forest[J]. OECOLOGIA,2015,178(4):1239-1250.
APA	Dai, Weiwei,Wang, Hui,Xu, Wenhua,Bai, Edith,Hu, Guoqing,&Jiang, Ping.(2015).The priming effect of soluble carbon inputs in organic and mineral soils from a temperate forest.OECOLOGIA,178(4),1239-1250.
MLA	Dai, Weiwei,et al."The priming effect of soluble carbon inputs in organic and mineral soils from a temperate forest".OECOLOGIA 178.4(2015):1239-1250.