Exudate components mediate soil C dynamic through different priming mechanisms in forest soils

doi:10.1016/j.apsoil.2020.103855

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所

	Exudate components mediate soil C dynamic through different priming mechanisms in forest soils
	Wang, Qitong 1,4,5; Yuan, Yuanshuang 2; Zhang, Ziliang 3; Liu, Dongyan 1,5; Xiao, Juan 4; Yin, Huajun 4
刊名	APPLIED SOIL ECOLOGY
	2021-04-01
卷号	160 页码:7
关键词	Exudate components Soil C dynamic Priming effect Microbial process Mineral-organic associations
ISSN号	0929-1393
DOI	10.1016/j.apsoil.2020.103855
通讯作者	Xiao, Juan(xiaojuanhj@163.com) ; Yin, Huajun(yinhj@cib.ac.cn)
英文摘要	While accumulating evidence suggests that root exudate inputs can significantly affect soil organic carbon (SOC) dynamic and stability through rhizosphere priming effects, our understanding of the effects of specific exudate components on soil C storage and the underlying mechanisms remains largely limited. In a well-controlled rhizosphere simulation system, we added three exudate components (i.e., glucose, glycine, and oxalic acid) through artificial roots to soils collected from a similar to 200-year-old spruce-fir forest for an incubation period of 25 days. The results showed that oxalic acid addition induced a net soil C loss (-1.12%) through two synergistic priming processes. On the one hand, the addition of oxalic acid accelerated SOC mineralization by stimulating microbial activity and enzyme production (biotic process); on the other hand, the previously mineral-protected SOC was released for microbial utilization through the disruption of mineral-organic associations after oxalic acid addition (abiotic process). In contrast, glucose addition increased soil C accumulation (1.28%) by two antagonistic priming processes. Glucose not only enhanced microbial activity and enzyme production and consequently accelerated SOC mineralization (biotic process), but also promoted the formation of mineral-organic associations to inhibit the microbial accessibility of SOC (abiotic process). Compared to glucose, glycine addition induced a greater soil C accumulation (2.52%) mainly via inhibiting microbial degradation (biotic process). These observations suggested that distinct components of root exudates profoundly mediate soil C dynamics and soil C storage in forests through different biotic and abiotic priming mechanisms.
资助项目	National Natural Science Foundation of China[31670449] ; National Natural Science Foundation of China[31700387] ; National Natural Science Foundation of China[31800425] ; National Natural Science Foundation of China[31872700] ; National Natural Science Foundation of China[31960271] ; Research Fund for Excellence Project of China West Normal University[17YC144] ; Doctoral Scientific Research Foundation of China West Normal University[14E011] ; Science and Technology Foundation of Guizhou Province, China[[2020]1Y075]
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000618081000014
资助机构	National Natural Science Foundation of China ; Research Fund for Excellence Project of China West Normal University ; Doctoral Scientific Research Foundation of China West Normal University ; Science and Technology Foundation of Guizhou Province, China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/56012]
专题	中国科学院水利部成都山地灾害与环境研究所
通讯作者	Xiao, Juan; Yin, Huajun
作者单位	1.Chinese Acad Sci, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Chengdu Inst Biol, Chengdu 610041, Peoples R China 2.Guizhou Minzu Univ, Coll Ecoenvironm Engn, Guiyang 550025, Peoples R China 3.Clemson Univ, Dept Plant & Environm Sci, Clemson, SC 29634 USA 4.China West Normal Univ, Coll Environm Sci & Engn, Nanchong 637000, Peoples R China 5.Chinese Acad Sci, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu Inst Biol, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qitong,Yuan, Yuanshuang,Zhang, Ziliang,et al. Exudate components mediate soil C dynamic through different priming mechanisms in forest soils[J]. APPLIED SOIL ECOLOGY,2021,160:7.
APA	Wang, Qitong,Yuan, Yuanshuang,Zhang, Ziliang,Liu, Dongyan,Xiao, Juan,&Yin, Huajun.(2021).Exudate components mediate soil C dynamic through different priming mechanisms in forest soils.APPLIED SOIL ECOLOGY,160,7.
MLA	Wang, Qitong,et al."Exudate components mediate soil C dynamic through different priming mechanisms in forest soils".APPLIED SOIL ECOLOGY 160(2021):7.