| Registro completo |
| Provedor de dados: |
Scientia Agricola
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| País: |
Brazil
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| Título: |
Narasin inclusion for feedlot lambs fed a diet containing high amounts of ground flint corn
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| Autores: |
Polizel,Daniel Montanher
Marques,Samuel Sutil
Westphalen,Mariana Fontana
Gouvea,Vinícius Nunes
Ferraz Júnior,Marcos Vinícius de Castro
Miszura,Alexandre Arantes
Barroso,José Paulo Roman
Limede,Arnaldo Cintra
Ferreira,Evandro Maia
Pires,Alexandre Vaz
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| Data: |
2021-01-01
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| Ano: |
2021
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| Palavras-chave: |
Average daily gain
Feed efficiency
Propionate
Rumen metabolism
Sheep
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| Resumo: |
ABSTRACT: Narasin is an antibacterial agent that may change rumen fermentation. Two experiments were proposed to evaluate the efficiency of narasin inclusion for lambs fed a diet containing high amounts of ground flint corn. Thirty rumen-cannulated wethers were used to evaluate nutrient digestibility, nitrogen balance, and rumen metabolism (Exp. 1); and forty-five lambs were used to evaluate performance (Exp. 2) of animals fed with narasin for high flint corn diets. The experimental diets were: control or basal diet without additives (C); 25 mg of monensin kg−1 of dry matter (DM) (M); and inclusion of 5 (N5), 10 (N10), and 15 (N15) mg of narasin kg−1 of DM. The statistical analyses were performed using the MIXED procedure of SAS. Monensin increased DM digestibility compared to C ( p = 0.01) and increasing doses of narasin linearly increased DM digestibility ( p < 0.01). There was a quadratic effect ( p = 0.10) for molar proportion of acetate peaking at N15. Monensin inclusion increased ( p = 0.07) propionate compared to C; however, it did not differ from narasin. The increasing levels of narasin linearly decreased the total volatile fatty acids concentration in the rumen ( p = 0.02). Monensin and C showed a similar performance. The increasing levels of narasin linearly increased ( p ≤ 0.04) average daily gain and feed efficiency. Monensin and narasin changed rumen fermentation and improved overall nutrient digestibility. However, lambs that received narasin showed improved performance when compared with animals that received M.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000600401
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| Editor: |
São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
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| Relação: |
10.1590/1678-992x-2020-0010
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| Formato: |
text/html
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| Fonte: |
Scientia Agricola v.78 n.6 2021
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| Direitos: |
info:eu-repo/semantics/openAccess
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