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Prediction of apparent digestibility of hays from natural pastures of the Northeast region of Portugal

2008Journal article Open access
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dc.contributor.authorGalvão, Lurdes
dc.contributor.authorGuedes, Cristina M.
dc.contributor.authorRodrigues, M.A.M.
dc.contributor.authorSilva, S.R.
dc.contributor.authorValentim, Ramiro
dc.contributor.authorMoreira, Olga
dc.contributor.authorRibeiro, José Ramalho
dc.contributor.authorSequeira, C.A.
dc.date.accessioned2011-08-19T14:09:21Z
dc.date.available2011-08-19T14:09:21Z
dc.date.issued2008
dc.description.abstractIn the Northeast region of Portugal hays from natural pastures are traditionally used as the main feed during the period of drought and the evaluation of its nutritive value is essential. The aim of this study was to predict the apparent organic matter digestibility (OMD) of 21 hays from natural pastures based on chemical composition, pepsin-cellulase solubility of organic matter (OMS) and in vitro organic matter digestibility. Chemical composition of hays showed a wide range of values and acid detergent lignin (ADL) was the component that presented the highest variation (CV = 18.4%). The OMD varied between 516 and 658 g/kg OM. The best single OMD predictor was OMS (RSD = 2.8%, R2 = 0.52, P<0.001). Using multiple regression to predict OMD, the variables included in the model were OMS and ADL (OMD = 21.51 + 0.94 OMS – 0.83 ADL; RSD = 2.75%; R2 = 0.54; P<0.0001). According to principal component analysis (PCA) hays were divided in 3 groups and the multiple regression established for the larger group of hays (n=10) was: OMD = 4.13 + 0.85 OMS – 1.03 ADL; RSD = 2.13%, R2 = 0.77, P<0.0001. The OMS method was superior to chemical composition and to the in vitro rumen fluid method in predicting OMD of hays from natural pastures. Results from PCA suggested that it may be useful to group these hays according to its chemical composition to accurately predict OMD.por
dc.identifier.citationGalvão, Lurdes; Guedes, C.M.; Rodrigues, M.A.M.; Silva, S.R.; Valentim, Ramiro; Moreira, O.C.; Ribeiro, J.R.; Sequeira, C.A. (2008). Prediction of apparent digestibility of hays from natural pastures of the Northeast region of Portugal. Livestock Research for Rural Development. ISSN 0121-3784. 20:8por
dc.identifier.issn0121-3784
dc.identifier.urihttp://hdl.handle.net/10198/6015
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherFundación CIPAVpor
dc.subjectIn vitro digestibilitypor
dc.subjectIn vivo digestibilitypor
dc.subjectMeadow hayspor
dc.subjectPepsin-cellulasepor
dc.titlePrediction of apparent digestibility of hays from natural pastures of the Northeast region of Portugalpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue20 (8), Article #124por
oaire.citation.titleLivestock Research for Rural Developmentpor
person.familyNameValentim
person.givenNameRamiro
person.identifier.ciencia-idB01B-96FF-D524
person.identifier.orcid0000-0002-3514-988X
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication7c1f54bd-81e6-45c4-ac4d-6a297ecd0f35
relation.isAuthorOfPublication.latestForDiscovery7c1f54bd-81e6-45c4-ac4d-6a297ecd0f35

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