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The effect of tillage management on microbial functions in a maize crop at different slope positions
Xu, Meng1,2; Cardenas, Laura M.3; Horrocks, Claire3; Lopez-Aizpun, Maria3; Zhang, Junling2; Zhang, Fusuo2; Dungait, Jennifer A. J.3,4,5
2021-11-01
Source PublicationGEODERMA
ISSN0016-7061
Volume401Pages:14
Corresponding AuthorCardenas, Laura M.(laura.cardenas@rothamsted.ac.uk)
AbstractDetermining whether agricultural soils act as sinks or sources of greenhouse gases (GHGs) requires the quantification of variations in the pools and fluxes of soil organic carbon (SOC) and nutrients, e.g. nitrogen (N), as well as the associated soil microbial responses. In this study, soil was collected from experimental plots of maize (Zea mays) under conventional, minimum or strip tillage treatments established in a sloping field (similar to 10%) of loamy soil in SW England, UK, where maize had been cultivated conventionally for 12 years. Topsoil (0-10 cm) cores were collected from the top, mid, bottom and foot slope positions to investigate soil C, N and microbial properties. The impact of conventional management on potential GHG emissions was assessed by incubating soils collected from the top, mid and bottom slope positions from the conventional treatment. Contents of SOC and total N were greatest at the top slope position and soil mineral N (NO3--N and NH4+-N) concentrations were greater at the bottom and foot slope positions in all treatments. Biomarker phospholipid fatty acids (PLFA) for Gram positive bacteria and fungi were relatively C-13-enriched at each slope position regardless of treatment, indicating preferential utilization of organic matter from maize (C-4) rather than SOC (C-3). Around 70% of carbon incorporated into total PLFA was derived from C-3-SOC at the slope foot, indicating that more SOC older than 12 years was being mineralized at the depositional position. Effluxes of N2O and CO2, and total GHG emission were greatest from the incubated soils sampled from the bottom slope position, suggesting that conditions in depositional positions of regularly ploughed sloping arable fields may have increased the potential for mineralization and denitrification. We conclude that the C sink potential of the depositional positions of slopes may be diminished by coincidental GHG emissions.
KeywordSoil tillage Carbon and nitrogen cycling Greenhouse gas emissions Soil microbial community Compound-specific( 13)C stable isotope analysis
DOI10.1016/j.geoderma.2021.115171
WOS KeywordNITROUS-OXIDE EMISSIONS ; GREENHOUSE-GAS EMISSIONS ; AGRICULTURAL SOIL-EROSION ; ORGANIC-CARBON ; LAND-USE ; IMPACT ; REDISTRIBUTION ; DYNAMICS ; MINERALIZATION ; DEPOSITION
Indexed BySCI
Language英语
Funding ProjectBBSRC Institute Strategic Grant[BBS/E/C/00005214] ; National Basic Research Program of China[2015CB150500] ; BBSRC UK:China International Partnering Award Soils for Sustainable Agriculture[BB/I024933/1] ; Biotechnology and Biological Sciences Research Council[BBS/E/C/000I0310] ; Biotechnology and Biological Sciences Research Council[BBS/E/C/000I0320]
Funding OrganizationBBSRC Institute Strategic Grant ; National Basic Research Program of China ; BBSRC UK:China International Partnering Award Soils for Sustainable Agriculture ; Biotechnology and Biological Sciences Research Council
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000667306700009
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/163774
Collection中国科学院地理科学与资源研究所
Corresponding AuthorCardenas, Laura M.
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.China Agr Univ, Coll Resources & Environm Sci, Ctr Resources Environm & Food Secur, Key Lab PlantSoil Interact,Minist Educ, Beijing 100193, Peoples R China
3.Rothamsted Res, Sustainable Agr Syst Dept, Okehampton EX20 2SB, Devon, England
4.Univ Exeter, Coll Life & Environm Sci, Geog, Exeter, Devon, England
5.SRUC Scotlands Rural Coll, Edinburgh, Midlothian, Scotland
Recommended Citation
GB/T 7714
Xu, Meng,Cardenas, Laura M.,Horrocks, Claire,et al. The effect of tillage management on microbial functions in a maize crop at different slope positions[J]. GEODERMA,2021,401:14.
APA Xu, Meng.,Cardenas, Laura M..,Horrocks, Claire.,Lopez-Aizpun, Maria.,Zhang, Junling.,...&Dungait, Jennifer A. J..(2021).The effect of tillage management on microbial functions in a maize crop at different slope positions.GEODERMA,401,14.
MLA Xu, Meng,et al."The effect of tillage management on microbial functions in a maize crop at different slope positions".GEODERMA 401(2021):14.
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