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Contrasting responses of soil C-acquiring enzyme activities to soil erosion and deposition
Du, Lanlan1,2; Wang, Rui3; Hu, Yaxian3; Li, Xiaogang3; Gao, Sheng3; Wu, Xihui3; Gao, Xin3; Yao, Lunguang4; Guo, Shengli1,2,3,4
2021-03-01
Source PublicationCATENA
ISSN0341-8162
Volume198Pages:9
Corresponding AuthorGuo, Shengli(guoshli@nwafu.edu.cn)
AbstractSoil C-acquiring enzymes are good indicators for the biological mechanism of soil nutrients and organic matter cycles. However, they have been used less frequently to assess the ecological stability and soil C cycle in eroding landscapes due to a lack of knowledge of the responses of C-acquiring enzyme activities to soil erosion and deposition. In the present study, a 3-year field simulation experiment was conducted to examine the variations in the activities of C-acquiring enzymes (beta-1,4-xylosidase (beta X), beta-1,4-glucosidase (beta G) and beta-D-cellobiohydrolase (CBH)) from erosion-deposition plots with different slope gradients (5 degrees, 10 degrees and 20 degrees) on the Loess Plateau in China (2016-2018). The activities of beta X, beta G and CBH were higher in the depositional plots than in the erosional plots, and those differences were enlarged with increasing slope gradients. Compared to the 5 degrees-erosional plot, the activities of beta X, beta G and CBH respectively declined by 3.2-4.5%, 14.3-37.5% and 12.7-29.1% in the 10 degrees-and 20 degrees-erosional plots. The beta X, beta G and CBH activities were 2.2-18.1%, 17.3-32.1% and 14.8-86.2% higher in the 10 degrees-and 20 degrees-depositional plots than in the 5 degrees-depositional plot. Moreover, the total soil CO2 emissions from the whole erosion-deposition plots decreased as slopes steepened. The displaced runoff and sediment depleted soil moisture, SOC, clay and microbial biomass in the erosional plots but enhanced these resources in the depositional plots, which can account for the changes in C-acquiring enzyme activities. The spatial distribution of enzyme activities affected soil CO2 emissions in a positive linear function. The sensitive responses of the C-acquiring enzyme activities and the controlling effects of C-acquiring enzyme activities on soil CO2 emissions during erosion and deposition processes, should be properly considered in assessing the biological mechanism for nutrition cycling in regions predominated with fragmented eroding landscapes.
KeywordErosional plot Depositional plot Soil CO2 emission Chinese Loess Plateau
DOI10.1016/j.catena.2020.105047
WOS KeywordORGANIC-MATTER ; EXTRACELLULAR ENZYMES ; EXTRACTION METHOD ; WATER EROSION ; CARBON-CYCLE ; NITROGEN ; DECOMPOSITION ; STOICHIOMETRY ; RESPIRATION ; DIVERSITY
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41371279]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaGeology ; Agriculture ; Water Resources
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000605337000014
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/136379
Collection中国科学院地理科学与资源研究所
Corresponding AuthorGuo, Shengli
Affiliation1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
4.Nanyang Normal Univ, Collaborat Innovat Ctr Water Secur Water Source, Reg Midline South North Divers Project Henan Prov, Nanyang 473061, Henan, Peoples R China
Recommended Citation
GB/T 7714
Du, Lanlan,Wang, Rui,Hu, Yaxian,et al. Contrasting responses of soil C-acquiring enzyme activities to soil erosion and deposition[J]. CATENA,2021,198:9.
APA Du, Lanlan.,Wang, Rui.,Hu, Yaxian.,Li, Xiaogang.,Gao, Sheng.,...&Guo, Shengli.(2021).Contrasting responses of soil C-acquiring enzyme activities to soil erosion and deposition.CATENA,198,9.
MLA Du, Lanlan,et al."Contrasting responses of soil C-acquiring enzyme activities to soil erosion and deposition".CATENA 198(2021):9.
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