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dc.contributor.authorNaadland, Sondre Stokke
dc.contributor.authorSteinshamn, Håvard
dc.contributor.authorKrizsan, Sophie Julie
dc.contributor.authorRandby, Åshild Taksdal
dc.date.accessioned2017-12-21T14:42:42Z
dc.date.available2017-12-21T14:42:42Z
dc.date.created2016-12-01T15:46:47Z
dc.date.issued2017-06
dc.identifier.citationAnimal. 2017, 11 (6), 1000-1007.nb_NO
dc.identifier.issn1751-7311
dc.identifier.urihttp://hdl.handle.net/11250/2473599
dc.description.abstractThere are differences in grass-clover proportions and chemical composition between herbage from primary growth (PG) and regrowth (RG) in grass-clover leys. Mixing silages made from PG and RG may provide a more optimal diet to dairy cows than when fed separately. We tested the hypotheses that increasing dietary proportions of grass-clover silage made from RG compared with PG would increase digestion rate of potentially degradable NDF (pdNDF), and increase ruminal accumulation of indigestible NDF (iNDF). Eight rumen cannulated Norwegian Red cows were used in two replicated 4 × 4 Latin squares with 21-day periods. Silages were prepared from PG and RG of an organically cultivated ley, where PG and RG silages were fed ad libitum in treatments with RG replacing PG in ratios of 0, 0.33, 0.67 and 1 on dry matter basis in addition to 8 kg concentrate. We evaluated the effect of the four diets with emphasis on rumen- and total tract fiber digestibility. Increasing RG proportions decreased silage intake by 7%. Omasal flow of pdNDF decreased, whereas iNDF flow increased with increasing RG proportions. Increasing RG proportions decreased rumen pool sizes of NDF and pdNDF, whereas pool sizes of iNDF and CP increased. Increasing RG proportions increased digestion rate of NDF, which resulted in greater total tract digestion of NDF. Pure PG diet had the highest calculated energy intake, but the improved rumen digestion of NDF by cows offered 0.33 and 0.67 of RG leveled out milk fat and protein yields among the three PG containing diets.nb_NO
dc.language.isoengnb_NO
dc.publisherCambridge University Pressnb_NO
dc.titleEffect of organic grass-clover silage on fiber digestion in dairy cowsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.rights.holder© The Animal Consortium 2016nb_NO
dc.source.pagenumber1000-1007nb_NO
dc.source.volume11nb_NO
dc.source.journalAnimalnb_NO
dc.source.issue6nb_NO
dc.identifier.doi10.1017/S1751731116002421
dc.identifier.cristin1407280
dc.relation.projectNorges forskningsråd: 207755nb_NO
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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