Divergent contributions of living roots to turnover of different soil organic carbon pools and their links to plant traits

doi:10.1111/1365-2435.13934

	Divergent contributions of living roots to turnover of different soil organic carbon pools and their links to plant traits
	Huang, Junsheng ; Liu, Weixing ; Pan, Shengnan 1; Wang, Zhe 1,2; Yang, Sen 1; Jia, Zhou 1; Wang, Zhenhua 1; Deng, Meifeng 1; Yang, Lu 1; Liu, Chao 1; Chang, Pengfei 1; Liu, Lingli1
	2021
发表期刊	FUNCTIONAL ECOLOGY
ISSN	0269-8463
卷号	35 期号:12 页码:2821-2830
摘要	1. Rhizodeposits and root litter contribute critically to soil organic carbon (SOC) formation and decomposition. This root-induced SOC turnover shows great interspecific variations. Bulk SOC consists of diverse functional pools differing in formation and stabilization. Yet, it remains unclear which plant traits regulate the effects of living roots on the turnover of different SOC pools across species. 2. By performing (CO2)-C-13 continuous labelling of six grassland species for a growing season in a climate-controlled chamber, we quantified the contributions of living roots to the dynamics of the fast-cycling particulate organic C and the slow-cycling mineral-associated organic C, and explored their relations to plant traits. 3. The results showed that new root-derived SOC varied more than threefold among the six species. The variation in new root-derived SOC was best explained by the ratio of shoot to root biomass. Plant species with higher shoot:root ratio formed more new root-derived SOC. Most of the root-derived C (72%) was incorporated into the particulate organic C pool. All species caused positive rhizosphere priming effects (RPE), which varied sevenfold across species. Among plant traits, specific root length was the best predictor of interspecific variations in the RPE, with greater RPE associated with higher specific root length. Most of the RPE (70%) occurred in the mineral-associated organic C pool. Our results also showed that most plant species caused more old SOC decomposition via the RPE than new SOC formation, leading to net SOC losses, especially for the mineral-associated organic C pool. 4. Overall, we provide novel insights into the effects of plant traits on root-induced turnover of particulate and mineral-associated organic C. Our findings should be valuable for understanding how specific plant traits regulate SOC accumulation and stabilization. A free Plain Language Summary can be found within the Supporting Information of this article.
关键词	living root activities plant traits plant-soil interactions rhizodeposition rhizosphere priming effect soil organic carbon formation soil organic carbon turnover
学科领域	Ecology
DOI	10.1111/1365-2435.13934
收录类别	SCI
语种	英语
WOS关键词	MATTER DECOMPOSITION ; STABILIZATION ; LITTER ; FOREST ; INPUTS ; CO2 ; FRACTIONATION ; FRAMEWORK ; MINERALS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000707628600001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2435
资助机构	National Natural Science Foundation of China [32125025, 31901138, 31988102] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA23080301, XDA26010303]
作者邮箱	lingli.liu@ibcas.ac.cn
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26416
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Shanghai Normal Univ, Coll Life Sci, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Huang, Junsheng,Liu, Weixing,Pan, Shengnan,et al. Divergent contributions of living roots to turnover of different soil organic carbon pools and their links to plant traits[J]. FUNCTIONAL ECOLOGY,2021,35(12):2821-2830.
APA	Huang, Junsheng.,Liu, Weixing.,Pan, Shengnan.,Wang, Zhe.,Yang, Sen.,...&Liu, Lingli.(2021).Divergent contributions of living roots to turnover of different soil organic carbon pools and their links to plant traits.FUNCTIONAL ECOLOGY,35(12),2821-2830.
MLA	Huang, Junsheng,et al."Divergent contributions of living roots to turnover of different soil organic carbon pools and their links to plant traits".FUNCTIONAL ECOLOGY 35.12(2021):2821-2830.

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