000150628 001__ 150628
000150628 005__ 20251017144557.0
000150628 0247_ $$2doi$$a10.1071/AN19152
000150628 0248_ $$2sideral$$a117485
000150628 037__ $$aART-2020-117485
000150628 041__ $$aeng
000150628 100__ $$0(orcid)0000-0003-3927-9793$$aYuste, S.
000150628 245__ $$aEffect of preweaning diet on performance, blood metabolites and rumen fermentation around weaning in calves of two beef breeds
000150628 260__ $$c2020
000150628 5203_ $$aContext: Good transition from suckling to high-concentrate diets is essential to avoid nutritional disorders during the fattening period of beef calves. Aims: Assessing the optimal feeding strategies during the preweaning period of beef calves for an adequate adaptation to high-concentrate diets. Methods: A total of 30 female beef calves (15 Parda de Montaña and 15 Pirenaica), managed under restricted suckling, were assigned to three preweaning diets (milk only [MO], milk plus hay [MH], milk plus concentrate [MC]), fed from the third month until weaning at 5 months. During the subsequent transition period (1 month), all animals received a fattening concentrate plus wheat straw ad libitum. Key results: Milk intake did not differ among diets; solids intake was similar for MH and MC calves. Preweaning supplementation improved performance at the end of the suckling period (MC > MH > MO). During transition, concentrate intake was lower for MO calves; MH calves showed the lowest feed efficiency. At the end of transition, MC calves showed the highest liveweight and average daily gain (MC > MH = MO). Rumen pH at weaning did not differ from that at the end of transition in MC calves, whereas MH and MO animals showed lower values at the latter. Supplemented calves showed higher volatile fatty acids concentration than MO calves at weaning; MC calves showed the lowest values at the end of the transition period. Ammonia and lactic acid concentration at weaning was the highest for MO and MC calves respectively, with no differences between diets at the end of transition. Glucose and non-esterified fatty acids concentrations were only affected by age; urea and ß-hydroxybutyrate were affected by the interaction between diet and age. Economic profitability at weaning was higher for supplemented calves (MH = MC > MO), and ranked MC > MO > MH at the end of the transition. Gains during the suckling period, and hence the economic margin, were higher for Parda de Montaña than for Pirenaica calves; during transition the economic margin was similar. Conclusions: Preweaning supplementation with concentrates is the most interesting option in terms of performance and profitability. Implications: Preweaning solid supplementation increases calf performance and provides better rumen development, essential for a smooth transition to fattening diets.
000150628 540__ $$9info:eu-repo/semantics/closedAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000150628 590__ $$a1.533$$b2020
000150628 591__ $$aAGRICULTURE, DAIRY & ANIMAL SCIENCE$$b35 / 63 = 0.556$$c2020$$dQ3$$eT2
000150628 592__ $$a0.529$$b2020
000150628 593__ $$aFood Science$$c2020$$dQ2
000150628 593__ $$aAnimal Science and Zoology$$c2020$$dQ2
000150628 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000150628 700__ $$0(orcid)0000-0001-8932-4615$$aAmanzougarene, Z.
000150628 700__ $$0(orcid)0000-0002-8753-8887$$aDe Vega, A.$$uUniversidad de Zaragoza
000150628 700__ $$0(orcid)0000-0002-0712-1185$$aFondevila, M.$$uUniversidad de Zaragoza
000150628 700__ $$0(orcid)0000-0003-3875-4935$$aBlanco, M.
000150628 700__ $$0(orcid)0000-0003-3943-5311$$aCasasús, I.
000150628 7102_ $$12008$$2700$$aUniversidad de Zaragoza$$bDpto. Produc.Animal Cienc.Ali.$$cÁrea Producción Animal
000150628 773__ $$g60, 8 (2020), 1018-1027$$pAnim. Prod. Sci.$$tAnimal Production Science$$x1836-0939
000150628 8564_ $$s211772$$uhttps://zaguan.unizar.es/record/150628/files/texto_completo.pdf$$yVersión publicada
000150628 8564_ $$s2551447$$uhttps://zaguan.unizar.es/record/150628/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000150628 909CO $$ooai:zaguan.unizar.es:150628$$particulos$$pdriver
000150628 951__ $$a2025-10-17-14:13:34
000150628 980__ $$aARTICLE