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

文献类型：期刊论文

作者Huang, Junsheng; Liu, Weixing; Pan, Shengnan3; Wang, Zhe1,3; Yang, Sen3; Jia, Zhou3; Wang, Zhenhua3; Deng, Meifeng3; Yang, Lu3; Liu, Chao3
刊名FUNCTIONAL ECOLOGY
出版日期2021
卷号35期号:12页码:2821-2830
关键词living root activities plant traits plant-soil interactions rhizodeposition rhizosphere priming effect soil organic carbon formation soil organic carbon turnover
ISSN号0269-8463
DOI10.1111/1365-2435.13934
文献子类Article
英文摘要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.
学科主题Ecology
出版地HOBOKEN
电子版国际标准刊号1365-2435
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)
语种英语
WOS记录号WOS:000707628600001
出版者WILEY
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]
源URL[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.Univ Chinese Acad Sci, Beijing, Peoples R China
2.Shanghai Normal Univ, Coll Life Sci, Shanghai, Peoples R China
3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, 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.

入库方式： OAI收割

来源：植物研究所

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