1983
DOI: 10.2527/jas1983.571178x
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Effect of Monensin on Total Volatile Fatty Acid Production by Steers Fed a High Grain Diet2

Abstract: Four rumen-fistulated steers, averaging 315 kg during two experimental periods were used in a replicated 2 X 2 Latin square study designed to determine the effects of monensin supplementation on rumen volatile fatty acid (VFA) production, pH and liquid volume. A 72% steam-flaked, sorghum grain diet was fed twice daily at 0700 and 1700 h at 2.0% of live body weight. Production rates were determined at 11 times during a 24-h feeding cycle by short-term in vitro incubations of whole rumen contents. Monensin incre… Show more

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Cited by 18 publications
(9 citation statements)
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“…The most consistent and well-documented fermentation alteration observed upon ionophore feeding is the increased molar proportion of propionic acid with a concurrent decrease in the molar proportions of acetate and butyrate in the VF As produced in the rumen (Richardson et at., 1976;Prange et at., 1978;Van Maanen et al, 1978;Rogers and Davis, 1982a;Armentano and Young, 1983;Shell et al, 1983). The most consistent and well-documented fermentation alteration observed upon ionophore feeding is the increased molar proportion of propionic acid with a concurrent decrease in the molar proportions of acetate and butyrate in the VF As produced in the rumen (Richardson et at., 1976;Prange et at., 1978;Van Maanen et al, 1978;Rogers and Davis, 1982a;Armentano and Young, 1983;Shell et al, 1983).…”
Section: Ruminal Effectsmentioning
confidence: 91%
“…The most consistent and well-documented fermentation alteration observed upon ionophore feeding is the increased molar proportion of propionic acid with a concurrent decrease in the molar proportions of acetate and butyrate in the VF As produced in the rumen (Richardson et at., 1976;Prange et at., 1978;Van Maanen et al, 1978;Rogers and Davis, 1982a;Armentano and Young, 1983;Shell et al, 1983). The most consistent and well-documented fermentation alteration observed upon ionophore feeding is the increased molar proportion of propionic acid with a concurrent decrease in the molar proportions of acetate and butyrate in the VF As produced in the rumen (Richardson et at., 1976;Prange et at., 1978;Van Maanen et al, 1978;Rogers and Davis, 1982a;Armentano and Young, 1983;Shell et al, 1983).…”
Section: Ruminal Effectsmentioning
confidence: 91%
“…Os ionóforos alteram a fermentação ruminal, aumentando a formação de propionato e a oxidação hepática de glicose no ciclo do ácido tricarboxílico e reduzindo a relação acetato:propionato (Richardson et al, 1976) e a produção ruminal de butirato (Shell et al, 1983). Esses fatores, em conjunto, proporcionam aumento na disponibilidade de energia para o crescimento animal e, consequentemente, reduzem a utilização das reservas corporais (Arieli et al, 2001;Ignácio et al, 2003).…”
Section: Resultsunclassified
“…Foram encontrados, neste trabalho, resultados apenas para a diminuição do ácido acético e butírico, sendo que para o propiônico não foi obtida resposta significativa. SHELL et al (1983), trabalhando com novilhos alimentados em dieta com alta quantidade de grãos, obtiveram aumento do propiônico nos animais suplementados com monensina. Os resultados obtidos no líquido ruminal foram equivalentes aos encontrados na literatura (HADDAD e LOURENÇO JR., 1977;HOLZER et al, 1979;TURNER et al, 1980;BOIN et al, 1984;e ZINN e BORQUES, 1993).…”
Section: Resultsunclassified
“…Os valores de pH no material ruminal apresentaram aumento linear significativo (p<0,05) com o Tabela 4 -Ácidos graxos voláteis (mM) nas amostras de líquido ruminal coletado após abate dos animais, em função dos diferentes níveis de monensina na dieta (M) 587 SALLES e LUCCI emprego de níveis mais elevados de monensina. Na literatura, o ionóforo produziu aumento significativo no pH ruminal in vitro (SCHELLING, 1984); benefícios similares foram encontrados por NAGARAJA et al (1982), HORN et al (1981), SHELL et al (1983), BRANINE e GALYEAN (1990) e CLARY et al (1993. Contudo, vários autores não encontraram resultados significativos de alteração do pH ruminal com a suplementação do ionóforo (DINIUS et al, 1976;POOS et al, 1979;HOLZER et al, 1979;NAGARAJA et al, 1982;DARDEN et al, 1985;BEACON et al, 1988;YANG e RUSSELL, 1993a;e ZINN e BORQUES, 1993).…”
Section: Resultsunclassified