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dc.contributor.authorStark, Christine H. E.en
dc.contributor.authorCondron, Leo M.en
dc.contributor.authorStewart, Alisonen
dc.contributor.authorDi, Hong J.en
dc.contributor.authorO'Callaghan, M.en
dc.date.accessioned2008-05-13T00:12:16Z
dc.date.issued2007-01en
dc.identifier.citationStark, C., Condron, L. M., Stewart, A., Di, H. J., & O'Callaghan, M. (2007). Influence of organic and mineral amendments on microbial soil properties and processes. Applied Soil Ecology, 35(1), 79-93.en
dc.identifier.issn0929-1393en
dc.identifier.urihttps://hdl.handle.net/10182/471
dc.description.abstractMicrobial diversity in soils is considered important for maintaining sustainability of agricultural production systems. However, the links between microbial diversity and ecosystem processes are not well understood. This study was designed to gain better understanding of the effects of short-term management practices on the microbial community and how changes in the microbial community affect key soil processes. The effects of different forms of nitrogen (N) on soil biology and N dynamics was determined in two soils with organic and conventional management histories that varied in soil microbial properties but had the same fertility. The soils were amended with equal amounts of N (100 kg ha⁻¹) in organic (lupin, Lupinus angustifolius L.) and mineral form (urea), respectively. Over a 91-day period, microbial biomass C and N, dehydrogenase enzyme activity, community structure of pseudomondas (sensu stricto), actinomycetes and α proteobacteria (by denaturing gradient gel electrophoresis (DGGE) following PCR amplification of 16S rDNA fragments) and N mineralisation were measured. Lupin amendment resulted in a two- to five-fold increase in microbial biomass and enzyme activity, while these parameters did not differ significantly between the urea and control treatments. The PCR–DGGE analysis showed that the addition of mineral and organic compounds had an influence on the microbial community composition in the short term (up to 10 days) but the effects were not sustained over the 91-day incubation period. Microbial community structure was strongly influenced by the presence or lack of substrate, while the type of amendment (organic or mineral) had an effect on microbial biomass size and activity. These findings show that the addition of green manures improved soil biology by increasing microbial biomass and activity irrespective of management history, that no direct relationship existed among microbial structure, enzyme activity and N mineralisation, and that microbial community structure (by PCR–DGGE) was more strongly influenced by inherent soil and environmental factors than by short-term management practices.en
dc.format.extent79-93en
dc.language.isoenen
dc.publisherElsevieren
dc.relationThe original publication is available from - Elsevieren
dc.rightsCopyright © 2006 Elsevier B.V. All rights reserved.en
dc.subjectureaen
dc.subjectmicrobial community structureen
dc.subjectDGGEen
dc.subjectnitrogen mineralisationen
dc.subjectorganic and conventional farming practicesen
dc.subjectlupin (Lupinus angustifolius L.) green manureen
dc.subjectAgronomy & Agricultureen
dc.titleInfluence of organic and mineral amendments on microbial soil properties and processesen
dc.typeJournal Article
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300100 Soil and Water Sciences::300102 Soil biologyen
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Soil and Physical Sciencesen
lu.contributor.unitBio-Protection Research Centreen
dc.subject.anzsrc05 Environmental Sciencesen
dc.subject.anzsrc06 Biological Sciencesen
dc.subject.anzsrc07 Agricultural and Veterinary Sciencesen
dc.relation.isPartOfApplied Soil Ecologyen
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/SOILS
pubs.organisational-group/LU/BPRC
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/QE18
pubs.publication-statusPublisheden
pubs.volume35en
lu.identifier.orcid0000-0002-3082-994X
lu.identifier.orcid0000-0001-9282-4063
lu.identifier.orcid0000-0002-6966-0299


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