Shifts in soil organic carbon dynamics under detritus input manipulations in a coniferous forest ecosystem in subtropical China

doi:10.1016/j.soilbio.2018.08.010

CORC > 武汉植物园 > 中国科学院武汉植物园

	Shifts in soil organic carbon dynamics under detritus input manipulations in a coniferous forest ecosystem in subtropical China
	Cheng, Xiaoli 2; Zhang, Qian 1,2; Yang, Fan 1,2; Li, Qianxi 2; Feng, Jiao 2; Chen, Qiong 1,2; Zhang, Dandan 1,2; Wu, Junjun 2
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2018-11-01
卷号	126 页码:1-10
关键词	Aggregates Detritus input manipulations Phospholipid fatty acids (PLFAs) biomass Recalcitrance index of carbon Roots
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2018.08.010
英文摘要	The underlying mechanism of how shifts in plant detritus input impact soil organic carbon (SOC) dynamics is not fully understood. Here we investigated the soil C content in different fractions (aggregates, labile and recalcitrant pool) after two years of detritus input manipulations (i.e. detritus input and removal treatment DIRT: control, CK; double litter, DL; no litter, NL; no roots, NR; no aboveground litter and no roots, NRNL) in a coniferous forest (Platycladus orientalis (Linn.) Franco) ecosystem in subtropical China. The root exclusion treatments (NR and NRNL) significantly decreased the macro-aggregate ( > 2000 mu m) fraction by 23.4%-27.7% compared to CK after two-year detritus input manipulation, and accordingly decreased the C content in macroaggregates. In contrast, the aboveground litter removal and addition (DL and NL) did not significantly impact those properties. Labile SOC significantly declined in the detritus removal treatments, while recalcitrant SOC remained relatively stable. In addition, root exclusion significantly reduced total microbial biomass and most of the taxonomic biomarkers compared to the CK. Fungal biomass were positively correlated with the proportion of macroaggregates across treatments. Principal component analysis revealed the separation of root exclusion treatments from the other detritus input manipulations was based on lower soil C content and proportion of macroaggregates. Overall, our results suggest that future shifts in plant detritus input, especially decreases in belowground litter inputs, can strongly and rapidly reduce SOC pools by reducing the proportion of macro aggregates and the C content in macroaggregates, highlighting the importance of root in regulating soil C sequestration in response to future climatic scenarios.
资助项目	National Natural Science Foundation of China[31470557] ; National Natural Science Foundation of China[31770563] ; Strategic Priority Research Program B of the Chinese Academy of Sciences[XDB15010200]
WOS研究方向	Agriculture
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000447580800001
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/5971]
专题	中国科学院武汉植物园
通讯作者	Cheng, Xiaoli
作者单位	1.Grad Univ Chinese Acad Sci, Beijing 10039, Peoples R China 2.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Xiaoli,Zhang, Qian,Yang, Fan,et al. Shifts in soil organic carbon dynamics under detritus input manipulations in a coniferous forest ecosystem in subtropical China[J]. SOIL BIOLOGY & BIOCHEMISTRY,2018,126:1-10.
APA	Cheng, Xiaoli.,Zhang, Qian.,Yang, Fan.,Li, Qianxi.,Feng, Jiao.,...&Wu, Junjun.(2018).Shifts in soil organic carbon dynamics under detritus input manipulations in a coniferous forest ecosystem in subtropical China.SOIL BIOLOGY & BIOCHEMISTRY,126,1-10.
MLA	Cheng, Xiaoli,et al."Shifts in soil organic carbon dynamics under detritus input manipulations in a coniferous forest ecosystem in subtropical China".SOIL BIOLOGY & BIOCHEMISTRY 126(2018):1-10.