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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.accessioned2018-12-12T15:06:04Z
dc.date.available2018-12-12T15:06:04Z
dc.date.created2016-09-19T16:01:10Z
dc.date.issued2016
dc.identifier.citationAnimal Feed Science and Technology. 2016, 220 57-66.nb_NO
dc.identifier.issn0377-8401
dc.identifier.urihttp://hdl.handle.net/11250/2577476
dc.description.abstractClover proportions, and thereby chemical composition of herbage, differ between primary growth (PG) and regrowth (RG) in organic managed grass-clover fields. The characteristics of PG and RG silages suggest different supplementary feeding strategies to sustain an efficient milk production in dairy cows. Silage made of the RG generally offers more crude protein (CP) in the diet than silage made of the PG because of an increasing proportion of clover later in the season. Additionally, grass and clover have different amino acid (AA) profiles. His has been suggested to be the first limiting AA in grass silage, while Met has been suggested to be the primarily limiting AA in red clover silage. Eight rumen cannulated Norwegian Red cows were used in two replicated 4 × 4 Latin squares with 21-days periods. Organic PG and RG silages were fed ad libitum in four diets with RG replacing PG silage in ratios of 0, 0.33, 0.67 and 1 on dry matter (DM) basis. Changing RG silage proportions from 0 to 1 increased daily CP intake from 2.90 to 3.08 kg and rumen NH3-concentrations from 4.9 to 8.4 mmol/L, but did not promote a better protein supply. Neither total ruminal outflow of AA nor the AA profile in the small intestine differed between dietary treatments. Met and His were probably the most limiting AA for a higher milk production. Limitations by His may be more related to diets based on PG, while production by cows fed diets based on more RG herbage were more likely limited by Met.
dc.language.isoengnb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.subjectNitrogen
dc.subjectMelkeku
dc.subjectDairy cow
dc.titleEffect of replacing organic grass-clover silage from primary growth with regrowth on N digestion in dairy cowsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersion
dc.subject.nsiVDP::Landbruksfag: 910
dc.subject.nsiVDP::Agricultural sciences: 910
dc.source.pagenumber57-66nb_NO
dc.source.volume220nb_NO
dc.source.journalAnimal Feed Science and Technologynb_NO
dc.identifier.doi10.1016/j.anifeedsci.2016.07.012
dc.identifier.cristin1382933
dc.relation.projectNorges forskningsråd: 207755nb_NO
cristin.unitcode192,10,1,0
cristin.unitnameInstitutt for husdyr- og akvakulturvitenskap
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal