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

文献类型：期刊论文

作者Wang, Qitong1,2,5; Yuan, Yuanshuang4; Zhang, Ziliang3; Liu, Dongyan1,2; Xiao, Juan5; Yin, Huajun5
刊名APPLIED SOIL ECOLOGY
出版日期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
DOI10.1016/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
WOS记录号WOS:000618081000014
出版者ELSEVIER
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
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, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu Inst Biol, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Chengdu Inst Biol, Chengdu 610041, Peoples R China
3.Clemson Univ, Dept Plant & Environm Sci, Clemson, SC 29634 USA
4.Guizhou Minzu Univ, Coll Ecoenvironm Engn, Guiyang 550025, Peoples R China
5.China West Normal Univ, Coll Environm Sci & Engn, Nanchong 637000, 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.

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来源：成都山地灾害与环境研究所

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