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dc.contributor.authorOrquera Arguero, Karinaes_ES
dc.contributor.authorBlanco Alibés, Mireiaes_ES
dc.contributor.authorBertolín Pardos, Juan Ramónes_ES
dc.contributor.authorFerrer Achiaga, Javieres_ES
dc.contributor.authorCasasús Pueyo, Isabeles_ES
dc.coverage.spatialCiencia animales_ES
dc.date.accessioned2023-02-22T09:04:56Z-
dc.date.available2023-02-22T09:04:56Z-
dc.date.issued2023es_ES
dc.identifier.citationJournal of Animal Science, 101: 1-11 (2023)-
dc.identifier.urihttp://hdl.handle.net/10532/6327-
dc.description.abstractOur study objective was to determine the effect of a short feed restriction (4 d) and subsequent refeeding (4 d) on the performance and metabolism of beef cows with a different nutritional status by particularly focusing on their milk fatty acid (FA) profile, to consider its potential use as biomarker of metabolic status. Thirty-two Parda de Montaña multiparous lactating beef cows were individually fed a diet based on the average cow’s net energy (NE) and metabolisable protein requirements. At 58 days in milk (DIM, d 0), cows underwent a 4 d feed restriction (55% requirements, restriction period). Before and after the restriction, diets met 100% of their requirements (basal and refeeding periods). Cow performance, milk yield and composition, and plasma metabolites, were determined on d -2, 1, 3, 5, 6, and 8. Cows were classified into two status clusters according to their pre-challenge performance and energy balance (EB) (Balanced vs. Imbalanced). All traits were statistically analyzed considering the fixed effect of status cluster and feeding period or day, with cow as a random effect. Imbalanced cows were heavier and had a more negative EB (P < 0.001), but similar milk yield, milk composition, and circulating metabolites (except for greater urea) than Balanced cows (P > 0.10). Milk contents of C18:1 cis-9, monounsaturated FA (MUFA), and mobilization FA were greater (P < 0.05), whereas saturated FA (SFA) and de novo FA were lesser in Imbalanced than Balanced cows (P < 0.05). Restriction decreased body weight (BW), milk yield, and milk protein compared to the basal period, but increased milk urea and plasma nonesterified fatty acids (NEFA) (P < 0.001). Milk contents of SFA, de novo, and mixed FA decreased immediately during the restriction, while MUFA, polyunsaturated FA and mobilization FA increased (P < 0.001). Basal milk FA contents were recovered on d 2 of refeeding, and all their changes strongly correlated with differences in EB and NEFA (P < 0.05). The general lack of interactions between status clusters and feeding periods implied that the response mechanisms to diet changes did not differ between cows with a different pre-challenge nutritional status.en
dc.language.isoenes_ES
dc.relation.urihttps://doi.org/10.1093/jas/skad053es_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.titlePerformance and milk fatty acid profile of beef cows with a different energy status with short nutrient restriction and refeedingen
dc.typeJournal Contribution*
dc.bibliographicCitation.volume101es_ES
dc.subject.agrovocAlimentación de los animaleses
dc.subject.agrovocBovinoses
dc.subject.agrovocAnimales de carnees
dc.subject.agrovocLechees
dc.subject.agrovocÁcidos grasoses
dc.subject.agrovocBalance de energíaes
dc.description.statusIn presses_ES
dc.type.refereedRefereedes_ES
dc.type.specifiedArticlees_ES
dc.bibliographicCitation.titleJournal Of Animal Scienceen
dc.relation.doi10.1093/jas/skad053es_ES
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