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| Leopoldino,W.M.; Lana,R.P.; Borges,A.C.; Mantovani,H.C.; Teixeira,R.M.A.; Oliveira,J.S.; Jaremtchuk,A.R.; Eifert,E.C.; Martins,R.G.R.. |
| Ruminal fluid from steers fed on pasture was incubated with artificial media at pH 5.5 and 7.0 in two experiments. In the first, the effect of monensin level on resistance of ruminal bacteria to potassium depletion was evaluated; in the second, effects of the ionophores monensin and lasalocid on ammonia and protein production were quantified. In experiment 1, culture media affected potassium level. The monensin concentration needed to cause half maximal potassium depletion was 2.77µM at pH 5.5 but was 0.056µM at pH 7.0, showing that bacteria incubated at pH 5.5 were more tolerant to monensin than those incubated at pH 7.0. Both ionophores as well as increased acidity caused decreased ammonia production. Both ionophores inhibited ammonia production by 56%,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Lasalocid; Monensin; PH; Rumen. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000600012 |
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