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Exudate components mediate soil C dynamic through different priming mechanisms in forest soils
Wang, Qitong1,2,3; Yuan, Yuanshuang4; Zhang, Ziliang5; Liu, Dongyan2,3; Xiao, Juan1; Yin, Huajun1
Corresponding AuthorXiao, Juan(xiaojuanhj@163.com) ; Yin, Huajun(yinhj@cib.ac.cn)
2021-04-01
Source PublicationAPPLIED SOIL ECOLOGY
ISSN0929-1393
Volume160Pages:7
AbstractWhile 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.
KeywordExudate components Soil C dynamic Priming effect Microbial process Mineral-organic associations
DOI10.1016/j.apsoil.2020.103855
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000618081000014
Funding OrganizationNational 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
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/56013
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorXiao, Juan; Yin, Huajun
Affiliation1.China West Normal Univ, Coll Environm Sci & Engn, Nanchong 637000, Peoples R China
2.Chinese Acad Sci, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu Inst Biol, Chengdu 610041, Peoples R China
3.Chinese Acad Sci, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Chengdu Inst Biol, Chengdu 610041, Peoples R China
4.Guizhou Minzu Univ, Coll Ecoenvironm Engn, Guiyang 550025, Peoples R China
5.Clemson Univ, Dept Plant & Environm Sci, Clemson, SC 29634 USA
Recommended Citation
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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