Effect of stage of growth on the chemical composition, nutritive value and ensilability of whole-crop barley

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dc.contributor.authorHargreaves, A.
dc.contributor.authorHill, J.
dc.contributor.authorLeaver, J. D.
dc.date.accessioned2024-01-10T12:05:07Z
dc.date.available2024-01-10T12:05:07Z
dc.date.issued2009
dc.description.abstractChemical composition, nutritive value and ensilability of whole-crop barley as a supplementary feed for dairy cows was investigated using a range of maturities of barley (seed coat ripe-GS 69, early dough stage-GS 82, soft dough-GS 87 and grain ripe-GS 90) in small scale silos. The ensiling experiment was based on a complete randomised design with three replicate silos per harvest date. Twelve 0.225 m(3) plastic silo (were used in the experiment and silo were sampled on opening for chemical composition and nutritive value. The fermentation process reduced the concentrations of water-soluble carbohydrate in the ensiled forage compared to the fresh forage. The proportion of residual WSC in silage did however increase with increasing crop maturity (0.051, 0.077, 0.167 and 0.560 of WSC retained in. the silage after the process of fermentation from forages cut at GS 69, 82, 87 and 90 respectively). Silages that were made from forage cut at the most mature stage of growth had a substantially lower production (P<0.001) of total fermentation acids (38.9 g/kg DM for GS 90) compared to those made from the least mature forage (203.4 g/kg DM for GS 69). The pH and concentrations of the various fermentation acids for silages made with the least mature forage (GS 69) were typical of acetic acid dominated fermentation. These silages contained little or no butyric acid and had a pH of 4.5 and contained high concentrations of ammonia-N (186 g/kg total N). Silages produced from forages cut at growth stage 82 were similar to those conserved from immature forages, having acetic acid dominated fermentation (lactic acid to acetic acid ratio of 1:1.22), relatively high pH (4.85) and high concentrations of ammonia-N (141 g/kg total N). These silages differed from those made from the most immature forage insofar that they contained high concentrations of butyric acid (50.5 g/kg DM). The processes of fermentation were affected by the stage of growth of the forage at ensiling and hence the economics of silage production. If the forage was too immature at ensiling, the yield of crop would be compromised but the silage produced may have moderate to high nutritive value and reasonable aerobic stability during the feed out phase. If the whole-crop forage was grown as a crop to secure high levels of supplementary feed from an alternative forage source (other than grass),the trade-off between yield, nutritive value and losses of feed immediately after silo opening would suggest the crop should be harvested between 350 and 450 g DM/kg dry matter. (C) 2009 Elsevier B.V. All rights reserved.
dc.fechaingreso.objetodigital2024-03-19
dc.format.extent12 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.anifeedsci.2009.03.007
dc.identifier.eissn1873-2216
dc.identifier.issn0377-8401
dc.identifier.urihttps://doi.org/10.1016/j.anifeedsci.2009.03.007
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/75950
dc.identifier.wosidWOS:000267479700006
dc.information.autorucAgronomía e Ing. Forestal;Hargreaves A;S/I;99627
dc.issue.numero1-2
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final61
dc.pagina.inicio50
dc.publisherELSEVIER
dc.revistaANIMAL FEED SCIENCE AND TECHNOLOGY
dc.rightsacceso restringido
dc.subjectCereal silage
dc.subjectChemical composition
dc.subjectNutritive value
dc.subjectDeterioration
dc.subjectSILAGE
dc.subjectDIGESTIBILITY
dc.subjectENSILAGE
dc.subjectMATURITY
dc.subjectFORAGE
dc.subjectWHEAT
dc.subjectSTEM
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleEffect of stage of growth on the chemical composition, nutritive value and ensilability of whole-crop barley
dc.typeartículo
dc.volumen152
sipa.codpersvinculados99627
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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