The effect of tillage management on microbial functions in a maize crop at different slope positions

doi:10.1016/j.geoderma.2021.115171

	The effect of tillage management on microbial functions in a maize crop at different slope positions
	Xu, Meng 1,2; Cardenas, Laura M.3; Horrocks, Claire 3; Lopez-Aizpun, Maria 3; Zhang, Junling 2; Zhang, Fusuo 2; Dungait, Jennifer A. J.3,4,5
刊名	GEODERMA
	2021-11-01
卷号	401 页码:14
关键词	Soil tillage Carbon and nitrogen cycling Greenhouse gas emissions Soil microbial community Compound-specific( 13)C stable isotope analysis
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2021.115171
通讯作者	Cardenas, Laura M.(laura.cardenas@rothamsted.ac.uk)
英文摘要	Determining 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.
资助项目	BBSRC 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]
WOS关键词	NITROUS-OXIDE EMISSIONS ; GREENHOUSE-GAS EMISSIONS ; AGRICULTURAL SOIL-EROSION ; ORGANIC-CARBON ; LAND-USE ; IMPACT ; REDISTRIBUTION ; DYNAMICS ; MINERALIZATION ; DEPOSITION
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000667306700009
资助机构	BBSRC 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
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/163773]
专题	中国科学院地理科学与资源研究所
通讯作者	Cardenas, Laura M.
作者单位	1.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
推荐引用方式 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.