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Revista Brasileira de Zootecnia
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Revista Brasileira de Zootecnia
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Fontes energéticas para bezerros de corte desmamados aos 80 dias de idade

Authors: Restle, João; Pascoal, Leonir Luíz; Rosa, Joilmaro Rodrigo Pereira; Freitas, Aline Kellermann de; Alves Filho, Dari Celestino; Brondani, Ivan Luiz; Pacheco, Paulo Santana; +1 Authors

Fontes energéticas para bezerros de corte desmamados aos 80 dias de idade

Abstract

Foram avaliadas diferentes fontes energéticas na fração concentrada da dieta de bezerros de corte em confinamento, previamente desmamados aos 80 dias de idade, com peso médio de 90 kg. As fontes energéticas testadas foram: grão de milho moído (GM), farelo de arroz integral (FA), casca do grão de soja (CS), grão de milho + farelo de arroz integral (GM + FA), farelo de arroz integral + casca do grão de soja (FA + CS) e grão de milho + casca do grão de soja (GM + CS). As dietas foram isonitrogenadas (13% PB) e apresentavam relação volumoso:concentrado 50:50. A fração volumosa foi representada por silagem de sorgo AG-2005E. Não foram verificadas diferenças significativas para os consumos diários de MS (CMS) expressos em kg (4,43 kg), por 100 kg de peso vivo (3,17%) e por unidade de peso metabólico (109,10 g). Bezerros alimentados com CS apresentaram consumos diários de FDN maiores que os alimentados com GM, quando expressos em kg por dia, por 100 kg de peso vivo e por unidade de peso metabólico (2,41 kg, 1,73% e 59,46 g versus 1,44 kg, 1,02% e 35,01 g, respectivamente). Os consumos diários de energia digestível (CED), nas três formas de expressão, o ganho médio diário (0,986 kg), a conversão alimentar (4,52 kg CMS/kg de ganho de peso) e a eficiência energética (12,23 Mcal CED/kg de ganho de peso) foram similares entre as fontes energéticas. No entanto, ao comparar, por intermédio da análise de contraste, as duas dietas contendo CS (CS e CS + FA) versus as duas dietas com GM (GM e GM + FA), observou-se que animais alimentados com as dietas contendo CS consumiram mais MS que aqueles alimentados com as dietas contendo GM, quando expresso por 100 kg de PV (3,28 vs 3,06%) e por unidade de peso metabólico (UTM) (112,67 vs 105,59 g). Houve diferença também nas formas de expressão do CED, com superioridade das dietas contendo GM (12,47 Mcal/dia e 0,304 Mcal/UTM) em relação àquelas contendo CS (11,67 Mcal/dia e 0,288 Mcal/UTM). A conversão alimentar nos tratamentos com GM (4,21) foi melhor que naqueles com CS (4,80).

Keywords

rice bran, grão de milho, confinamento, farelo de arroz integral, soybean hulls, feedlot, corn grain, casca do grão de soja, early weaning, desmame precoce

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
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