Microbial community mediated response of organic carbon mineralization to labile carbon and nitrogen addition in topsoil and subsoil

doi:10.1007/s10533-016-0198-4

CORC > 武汉植物园 > 中国科学院武汉植物园

	Microbial community mediated response of organic carbon mineralization to labile carbon and nitrogen addition in topsoil and subsoil
	Tian, Qiuxiang 1; Yang, Xiaolu 1; Wang, Xinggang 1,2; Liao, Chang 1,2; Li, Qianxi 1,2; Wang, Min 1,2; Wu, Yu 1,2; Liu, Feng 1
刊名	BIOGEOCHEMISTRY
	2016-03-01
卷号	128 期号:1-2 页码:125-139
关键词	Deep soil Priming effect C mineralization C sequestration N availability Microbial functional diversity
ISSN号	0168-2563
DOI	10.1007/s10533-016-0198-4
英文摘要	Over 50 % of soil carbon (C) is stored in subsoil (below 30 cm). Inputs of labile C and nutrients can stimulate soil organic carbon (SOC) mineralization priming effect (PE) and subsequently affect subsoil C dynamics. However, little is known about the magnitude and mechanism of the PE occurring in subsoil, which complicates the prediction of subsoil C dynamics. Using a lab incubation experiment, the effects of glucose and nitrogen (N) addition on SOC mineralization were studied for three soil layers (0-10, 10-30, and 30-60 cm) from a subtropical forest. Five glucose (5.16 atom % C-13) levels were applied according to soil microbial biomass in each soil layer. Meanwhile, community-level physiological profiling was conducted to reflect microbial functional diversity and activity. We found positive PE for all soil layers. The PE magnitude in subsoil was about two times higher than that in topsoil with stronger increase in the microbial activity in mining components of SOC. N addition led to a reduction of 45 % in the PE magnitude in topsoil with relatively lower microbial activity in mining N-containing substrates (amino acids and amines) but caused an increase of 18 % in subsoil PE. Soil C and N availability were associated with microbial functional activity, the shifts of which then mediated the SOC mineralization in the presence of labile C and nutrient. These results suggested that mineralization of subsoil C was more sensitive to labile C and N addition. Any future changes in environmental conditions that affect the input and distribution of labile C and N in soil profiles could affect C dynamics in deep soil.
资助项目	Natural Science Foundation of China[31270515] ; Natural Science Foundation of China[31400463] ; Chinese National Key Development Program for Basic Research[2014CB954003] ; China Postdoctoral Science Foundation[2015M570673]
WOS研究方向	Environmental Sciences & Ecology ; Geology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000374557300008
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/101]
专题	中国科学院武汉植物园
通讯作者	Liu, Feng
作者单位	1.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Tian, Qiuxiang,Yang, Xiaolu,Wang, Xinggang,et al. Microbial community mediated response of organic carbon mineralization to labile carbon and nitrogen addition in topsoil and subsoil[J]. BIOGEOCHEMISTRY,2016,128(1-2):125-139.
APA	Tian, Qiuxiang.,Yang, Xiaolu.,Wang, Xinggang.,Liao, Chang.,Li, Qianxi.,...&Liu, Feng.(2016).Microbial community mediated response of organic carbon mineralization to labile carbon and nitrogen addition in topsoil and subsoil.BIOGEOCHEMISTRY,128(1-2),125-139.
MLA	Tian, Qiuxiang,et al."Microbial community mediated response of organic carbon mineralization to labile carbon and nitrogen addition in topsoil and subsoil".BIOGEOCHEMISTRY 128.1-2(2016):125-139.