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dc.contributor.authorJohnsen, Julie Føske
dc.contributor.authorKischel, Stine Grønmo
dc.contributor.authorSætervik Rognskog, Maren
dc.contributor.authorVagle, Inga
dc.contributor.authorJohanssen, Juni Rosann E.
dc.contributor.authorRuud, Lars Erik
dc.contributor.authorFerneborg, Sabine
dc.date.accessioned2021-11-25T11:24:01Z
dc.date.available2021-11-25T11:24:01Z
dc.date.created2021-03-11T09:26:32Z
dc.date.issued2021
dc.identifier.citationJournal of Dairy Research. 2021, 88 (1), 56-59.en_US
dc.identifier.issn0022-0299
dc.identifier.urihttps://hdl.handle.net/11250/2831469
dc.description.abstractIn this research communication we describe the performance of dairy cow−calf pairs in two cow-driven CCC-systems differing in cows' access to the calves through computer-controlled access gates (smart gates, SG). We investigated cows' machine milk yield in the automatic milking system (AMS), calf growth, and intake of supplemental milk and concentrate. Two groups each with four cow-calf pairs were housed in a system with a cow area, a calf creep and a meeting area. SG's controlled cow traffic between the meeting area and the cow area where cows could obtain feed, cubicles and the AMS. Calves had ad libitum access to supplemental milk and concentrate. During the suckling phase of 31 d, cow access to the meeting area was free 24 h/d (group 1) or restricted (group 2) based on milking permission. Following the suckling phase, cow access was gradually decreased over 9 d (separation phase). During the suckling phase, cows' machine milk yield (mean ± sd) in the AMS was 11.4 ± 6.38 kg/d. In the separation phase, the yield increased to 25.0 ± 10.37 kg/d. Calf average daily gain (ADG) was high during the suckling phase: 1.2 ± 0.74 kg. During the separation phase, ADG decreased to 0.4 ± 0.72 kg which may be related to a low intake of supplemental milk. Calves' concentrate intake increased with age, and all calves consumed >1 kg/d after separation. We conclude that cows nurse the calf in a cow-directed CCC system well resulting in high ADG, and AMS milk yields were, at least, partially maintained during the suckling phase. Although the AMS yields increased in response to separation, calf ADG was decreased. A low sample size limits interpretation beyond description but provides a basis for hypotheses regarding future research into CCC-systems.en_US
dc.language.isoengen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleInvestigating cow−calf contact in a cow-driven system: performance of cow and calfen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber56-59en_US
dc.source.volume88en_US
dc.source.journalJournal of Dairy Researchen_US
dc.source.issue1en_US
dc.identifier.doihttps://doi.org/10.1017/S0022029921000200
dc.identifier.cristin1897193
dc.relation.projectNorges forskningsråd: 1897190en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal