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dc.contributor.authorCosgrove, G. P.en
dc.contributor.authorLee, J. M.en
dc.contributor.authorChapman, D. F.en
dc.contributor.authorStevens, D. R.en
dc.contributor.authorRossi, L.en
dc.contributor.authorKing, W. M.en
dc.contributor.authorEdwards, Granten
dc.description.abstractTo include metabolisable energy (ME) as a nutritive value factor for ryegrasses in the Forage Value Index (FVI) requires data for New Zealand cultivars on the effects of environmental and management factors on cultivar ranking. This study tested the hypothesis that variation among cultivars, and so ranking, is not influenced by environment, nitrogen (N) fertiliser level or the presence or absence of white clover. Eight cultivars, grown with or without white clover and at two levels of N fertiliser in grazed pastures in Waikato, Manawatū, Canterbury and Southland, were sampled seasonally over 3 years and analysed for ME. There were clover, N and cultivar main effects on ME in most seasons, however, there were no interactions that affected cultivar ranking, indicating that data from field evaluation systems based on monocultures are reliable for the purposes of the FVI. However, data for absolute ME concentration are required from multiple sites to account for the observed cultivar × environment interactionsen
dc.publisherNew Zealand Grassland Associationen
dc.relationThe original publication is available from - New Zealand Grassland Association -
dc.rights© NZGA and the authorsen
dc.subjectLolium perenneen
dc.subjectnutritive valueen
dc.subjectforage valueen
dc.subjectnitrogen fertiliseren
dc.subjectTrifolium repensen
dc.titleMetabolisable energy concentration in perennial ryegrass pastures: Multi-site analysis of effects of cultivar, nitrogen fertiliser and white clover contenten
dc.typeJournal Article
lu.contributor.unitLincoln Universityen
lu.contributor.unitVice Chancellor's Officeen
dc.subject.anzsrc0703 Crop and Pasture Productionen
dc.subject.anzsrc070302 Agronomyen
dc.subject.anzsrc079902 Fertilisers and Agrochemicals (incl. Application)en
dc.relation.isPartOfJournal of New Zealand Grasslandsen
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/QE18
pubs.organisational-group/LU/Vice Chancellor's Office

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