| Página principal > Artículos > Unmixed diet versus total mixed ration in beef cattle fed high-concentrate diets: effects on Methane emissions, animal performance, and rumen fermentation > MARC |
000152231 001__ 152231 000152231 005__ 20251017144642.0 000152231 0247_ $$2doi$$a10.3390/ani15050723 000152231 0248_ $$2sideral$$a143427 000152231 037__ $$aART-2025-143427 000152231 041__ $$aeng 000152231 100__ $$aArbaoui, Amira 000152231 245__ $$aUnmixed diet versus total mixed ration in beef cattle fed high-concentrate diets: effects on Methane emissions, animal performance, and rumen fermentation 000152231 260__ $$c2025 000152231 5060_ $$aAccess copy available to the general public$$fUnrestricted 000152231 5203_ $$aThis study assessed the effects of using a total mixed ration (TMR), compared to distributing the concentrate and the forage separately, on the productive performance of beef cattle fed high-concentrate diets and on rumen fermentation characteristics, including methane production. Eighteen rumen-fistulated beef calves were fed a concentrate plus pelleted barley straw separately (CS; n = 9) or as TMR (n = 9). Average daily gain and intake of TMR and of straw and concentrate with the CS treatment were recorded. Digestibility was estimated using ashes insoluble in hydrochloric acid as a marker. Rumen liquid and gas samples were obtained, and the abundance of total bacteria, methanogens, protozoa, and anaerobic fungi was analysed. Animals were slaughtered at 500 kg live weight (LW), and dressing percentage and carcass classification were obtained. Another 49 animals for each treatment were used on a commercial farm to exclusively assess animal performance. The treatment (CS or TMR) did not significantly affect (p > 0.05) final LW, average daily gain, carcass dressing percentage, dry matter or digestible organic matter intake, digestibility values, production of methane and carbon dioxide, and abundance of microorganisms in the rumen. However, animals fed TMR had lower rumen pH (5.87 vs. 5.58, p = 0.041 for CS and TMR), suggesting a higher risk of experiencing rumen acidosis than those fed straw and concentrate separately. In conclusion, using a total mixed ration does not seem a suitable strategy to reduce methane production or prevent rumen acidosis in feedlot cattle. 000152231 536__ $$9info:eu-repo/grantAgreement/ES/DGA/A25-23R$$9info:eu-repo/grantAgreement/ES/MICINN/IDI-20200342$$9info:eu-repo/grantAgreement/ES/UZ/PI26-21$$9info:eu-repo/grantAgreement/ES/UZ/PI57-23 000152231 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es 000152231 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000152231 700__ $$aGonzalo, Gonzalo 000152231 700__ $$0(orcid)0000-0001-5880-6021$$aBelanche, Alejandro$$uUniversidad de Zaragoza 000152231 700__ $$0(orcid)0000-0002-8753-8887$$aVega, Antonio de$$uUniversidad de Zaragoza 000152231 7102_ $$12008$$2700$$aUniversidad de Zaragoza$$bDpto. Produc.Animal Cienc.Ali.$$cÁrea Producción Animal 000152231 773__ $$g15, 5 (2025), 723 [15 pp.]$$pAnimals (Basel)$$tAnimals$$x2076-2615 000152231 8564_ $$s484557$$uhttps://zaguan.unizar.es/record/152231/files/texto_completo.pdf$$yVersión publicada 000152231 8564_ $$s2745253$$uhttps://zaguan.unizar.es/record/152231/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000152231 909CO $$ooai:zaguan.unizar.es:152231$$particulos$$pdriver 000152231 951__ $$a2025-10-17-14:32:37 000152231 980__ $$aARTICLE
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