Mycelium- and root-derived C inputs differ in their impacts on soil organic C pools and decomposition in forests

doi:10.1016/j.soilbio.2018.05.015

	Mycelium- and root-derived C inputs differ in their impacts on soil organic C pools and decomposition in forests
	Zhang, Ziliang 1,2; Xiao, Juan 3; Yuan, Yuanshuang 1,2; Zhao, Chunzhang 2; Liu, Qing 2; Yin, Huajun 2,3
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2018-08
卷号	123 页码:257-265
关键词	Priming effect Ectomycorrhizal fungi Extramatrical mycelia Labile carbon Recalcitrant c iarbon Stable carbonsotope
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2018.05.015
产权排序	1
文献子类	Article
英文摘要	While multiple lines of evidence suggests that root carbon (C) can significantly impact the soil organic C (SOC) pool and subsequent C cycles via rhizosphere priming effects, the relative magnitude of the effects that root- and fungal-derived C inputs have in driving the priming of SOC decomposition are currently unknown. In this study, we used ingrowth cores and stable C isotope analyses to quantify root- and mycelium-derived C sequestered in soil labile and recalcitrant C pools and their relative contributions to the decomposition of native SOC in a spruce-fir-dominated coniferous forest on the eastern Tibetan Plateau, China. The results showed that new C sequestered in the soil labile C pool was primarily (77%) from mycelium-derived C, while 60% of the root derived C sequestered in the soil was incorporated into the recalcitrant pool. Furthermore, although the total native SOC pool was not significantly influenced by new C derived from both roots and mycelia, mycelium derived C induced a remarkably greater negative priming effect (-12.0%) on the native labile C pool than did root-derived C (-5.8%); in contrast, mycelium-derived C induced a greater positive priming effect (13.8%) than root-derived C (7.1%) on the native recalcitrant C pool. Collectively, our findings suggest that mycelium-derived C make a greater contribution to the newly sequestered C in the soil labile C pool than root-derived C, thereby inducing a remarkably greater positive priming effect on the decomposition of native soil recalcitrant C. Therefore, mycelium-derived C inputs may play a dominant role in soil C dynamics and long-term C storage, at least in alpine forest ecosystems where ectomycorrhizal mutualisms dominate.
学科主题	Environment/ecology
URL标识	查看原文
WOS关键词	ECTOMYCORRHIZAL FUNGI ; MICROBIAL BIOMASS ; MYCORRHIZAL FUNGI ; CARBON INPUT ; ELEVATED CO2 ; MINERALIZATION RATES ; LITTER DECOMPOSITION ; EXTRACTION METHOD ; NITROGEN UPTAKE ; PINE FOREST
WOS研究方向	Agriculture
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000437392000030
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/29882]
专题	成都生物研究所_生态研究
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 2.CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; 3.China West Normal Univ, Coll Environm Sci & Engn, Nanchong 637000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Ziliang,Xiao, Juan,Yuan, Yuanshuang,et al. Mycelium- and root-derived C inputs differ in their impacts on soil organic C pools and decomposition in forests[J]. SOIL BIOLOGY & BIOCHEMISTRY,2018,123:257-265.
APA	Zhang, Ziliang,Xiao, Juan,Yuan, Yuanshuang,Zhao, Chunzhang,Liu, Qing,&Yin, Huajun.(2018).Mycelium- and root-derived C inputs differ in their impacts on soil organic C pools and decomposition in forests.SOIL BIOLOGY & BIOCHEMISTRY,123,257-265.
MLA	Zhang, Ziliang,et al."Mycelium- and root-derived C inputs differ in their impacts on soil organic C pools and decomposition in forests".SOIL BIOLOGY & BIOCHEMISTRY 123(2018):257-265.