SUBSTITUIÇÃO DE IONÓFOROS POR UM BLEND DE ÓLEOS FUNCIONAIS NA ALIMENTAÇÃO DE NOVILHAS NELORE EM TERMINAÇÃO INTENSIVA A PASTO

Autor: Alex Coene Fleitas
Přispěvatelé: Henrique Jorge Fernandes
Jazyk: portugalština
Rok vydání: 2021
Předmět:
Zdroj: Repositório Institucional da UFMS
Universidade Federal de Mato Grosso do Sul (UFMS)
instacron:UFMS
Popis: The objectives were: Chapter 1 – Write a literature review on the benefits, challenges and opportunities of intensive finishing on pasture and the use of ionophore antibiotics and functional oils as additives in ruminant nutrition; Chapter 2 – Evaluate the replacement of the ionophore antibiotics Monensina and Narasin by a blend of functional oils based on cashew and castor oil on the performance of heifers (Bos indicus) fed a diet with high concentrate content in intensive finishing on pasture; Chapter 3 – Evaluate the replacement of the ionophore antibiotics Monensin and Narasin by a blend of functional oils based on cashew and castor oil on the diurnal behavior of heifers (Bos indicus) fed a diet with high concentrated content in intensive finishing on pasture. Material and Methods: Chapters 2 and 3 - Twenty-seven Nelore heifers were used, with a mean age of 18 months and initial body weight (BW) 294.2 ± 16.5 kg. Three food additives were evaluated, namely: two ionophore antibiotics - Monensin (with inclusion of 25 mg/kg of DM concentrate) and Narasin (with inclusion of 13 mg/kg of DM concentrate); and a blend of functional oils (OF) based on cashew and castor oil (including 500 mg/kg of concentrate DM); Chapter 2 - Concentrate intake, performance, body development, fat finish, yield and carcass weight were analyzed; Chapter 3 – The following behavioral activities were analyzed: standing time (ST), lying time (LT), walking time (WT), grazing time (GT), time eating in the trough (TT), time drinking water (TW) , number of visits in the trough (NVT) and total time eating (TEtot), total time in activity (TAtot) were calculated. Results: Chapter 2 - No significant effect was observed in the analyzed variables, presenting similar results. Chapter 3 - The animals that received Monensin spent longer in the trough (P
Databáze: OpenAIRE
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