Plant carbon inputs through shoot, root, and mycorrhizal pathways affect soil organic carbon turnover differently

doi:10.1016/j.soilbio.2021.108322

	Plant carbon inputs through shoot, root, and mycorrhizal pathways affect soil organic carbon turnover differently
	Huang, Junsheng ; Liu, Weixing ; Yang, Sen 1; Yang, Lu 1; Peng, Ziyang 1; Deng, Meifeng ; Xu, Shan ; Zhang, Beibei ; Ahirwal, Jitendra ; Liu, Lingli1
	2021
发表期刊	SOIL BIOLOGY & BIOCHEMISTRY
ISSN	0038-0717
卷号	160
摘要	Plant carbon (C) inputs via shoot, roots, and the associated mycorrhizal fungi are vital drivers of soil organic C (SOC) stock and turnover. Both the amounts and proportions of plant C inputs to the soil through these pathways can be affected by soil fertility. Yet, we know little about how divergent pathways of plant C inputs contribute to SOC cycling under different soil fertility. By growing the C4 grass Cleistogenes squarrosa in C3 soils, we quantified the contributions of shoot, roots, and arbuscular mycorrhizal fungi (AMF) to SOC turnover with different fertility in a temperate grassland. Our four-year field experiment showed that soils with higher fertility sequestered more shoot-, root- and AMF-derived C, which were mainly driven by greater soil microbial biomass. Irrespective of soil fertility, roots contributed the most (44%) to new SOC formation, while shoot (28%) and AMF (28%) exerted similar but lower contributions. We found that the positive priming effects induced by roots and AMF were greater in more fertile soils, which were primarily associated with more root- and AMF-derived C, respectively. Across all the soil fertility levels, root pathway had an equal impact on new SOC accumulation and native SOC losses via priming effects, and thus caused no net SOC changes. However, the priming effect induced by AMF pathway was 60% higher than the root pathway across treatments. The disproportionately large priming effects relative to new SOC accumulation induced by AMF led to net SOC losses, especially in soils with higher fertility. Overall, we demonstrated that plant C inputs through shoot, root, and mycorrhizal pathways have differential impacts on SOC turnover. Our quantitative estimation should be valuable for more accurately modeling how much plant-derived C can be sequestered in the soils and advancing our understanding of future SOC dynamics under global changes.
关键词	Arbuscular mycorrhizal fungi Plant carbon inputs Plant-soil interaction Priming effect Soil fertility Soil organic carbon turnover
学科领域	Soil Science
DOI	10.1016/j.soilbio.2021.108322
收录类别	SCI
语种	英语
WOS关键词	BIOMASS ALLOCATION ; FUNGI ; NITROGEN ; MATTER ; DECOMPOSITION ; RHIZOSPHERE ; FOREST ; LITTER ; SEQUESTRATION ; COOPERATION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000683006800004
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献子类	Article
出版地	OXFORD
EISSN	1879-3428
资助机构	Chinese National Key Development Program for Basic Research [2019YFA0607301] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA23080301, XDA26010303] ; National Natural Science Foundation of China [31901138, 31988102, 31770530]
作者邮箱	huangjs306@hotmail.com ; lwxsx@ibcas.ac.cn ; lingli.liu@ibcas.ac.cn
引用统计	被引频次：76[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/2S10CLM1/26639
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 100093, Peoples R China 2.Univ Chinese Acad Sci, Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang, Junsheng,Liu, Weixing,Yang, Sen,et al. Plant carbon inputs through shoot, root, and mycorrhizal pathways affect soil organic carbon turnover differently[J]. SOIL BIOLOGY & BIOCHEMISTRY,2021,160.
APA	Huang, Junsheng.,Liu, Weixing.,Yang, Sen.,Yang, Lu.,Peng, Ziyang.,...&Liu, Lingli.(2021).Plant carbon inputs through shoot, root, and mycorrhizal pathways affect soil organic carbon turnover differently.SOIL BIOLOGY & BIOCHEMISTRY,160.
MLA	Huang, Junsheng,et al."Plant carbon inputs through shoot, root, and mycorrhizal pathways affect soil organic carbon turnover differently".SOIL BIOLOGY & BIOCHEMISTRY 160(2021).

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