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dc.contributor.authorAnderson, Cen_NZ
dc.contributor.authorBeare, Men_NZ
dc.contributor.authorBuckley, HLen_NZ
dc.contributor.authorLear, Gen_NZ
dc.date.accessioned2019-10-03T03:49:04Z
dc.date.available2019-10-03T03:49:04Z
dc.date.copyright2017-01-01en_NZ
dc.identifier.citationPeerJ 5:e3930 https://doi.org/10.7717/peerj.3930
dc.identifier.issn2167-8359en_NZ
dc.identifier.urihttp://hdl.handle.net/10292/12877
dc.description.abstractIn arable cropping systems, reduced or conservation tillage practices are linked with improved soil quality, C retention and higher microbial biomass, but most long- term studies rarely focus on depths greater than 15 cm nor allow comparison of microbial community responses to agricultural practices. We investigated microbial community structure in a long-term field trial (12-years, Lincoln, New Zealand) established in a silt-loam soil over four depth ranges down to 30 cm. Our objectives were to investigate the degree of homogenisation of soil biological and chemical properties with depth, and to determine the main drivers of microbial community response to tillage. We hypothesised that soil microbiological responses would depend on tillage depth, observed by a homogenisation of microbial community composition within the tilled zone. Tillage treatments were mouldboard plough and disc harrow, impacting soil tõ20 and ~10 cm depth, respectively. These treatments were compared to a no-tillage treatment and two control treatments, both permanent pasture and permanent fallow. Bacterial and fungal communities collected from the site were not impacted by the spatial location of sampling across the study area but were affected by physicochemical changes associated with tillage induced soil homogenisation and plant presence. Tillage treatment effects on both species richness and composition were more evident for bacterial communities than fungal communities, and were greater at depths < 15 cm. Homogenisation of soil and changing land management appears to redistribute both microbiota and nutrients deeper in the soil profile while consequences for soil biogeochemical functioning remain poorly understood.en_NZ
dc.publisherPeerJ
dc.relation.urihttps://peerj.com/articles/3930/
dc.rights© 2017 Anderson et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
dc.subjectARISA; Agricultural management; Ploughing; Microbial communities; Multivariate analyses
dc.titleBacterial and Fungal Communities Respond Differently to Varying Tillage Depth in Agricultural Soilsen_NZ
dc.typeJournal Article
dc.rights.accessrightsOpenAccessen_NZ
dc.identifier.doi10.7717/peerj.3930en_NZ
aut.relation.issue10en_NZ
aut.relation.volume2017en_NZ
pubs.elements-id315764
aut.relation.journalPeerJen_NZ


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