Methane emissions and estimates of ruminal fermentation parameters in beef cattle fed different dietary concentrate levels

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Data

2013-08-01

Autores

Pedreira, Márcio dos Santos
de Oliveira, Simone Gisele
Primavesi, Odo
de Lima, Magda Aparecida
Frighetto, Rosa Toyoko Shiraishi
Berchielli, Telma Teresinha [UNESP]

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Resumo

Using sorghum silage, the effect of roughage/concentrate ratios was evaluated on nutrient intake, digestibility, ruminal parameters and methane production by beef cattle. Three treatments (0, 30 and 60% of concentrate in DM of the diet) were distributed in three Latin squares, with nine animals and three periods. Dry matter intake increased as the grain concentration in diet increased; pH showed opposite behavior. Methane emissions were lower for animals fed the diet exclusively with sorghum silage as compared with those fed 30% of concentrate, but was similar to that of animals receiving 60% of concentrate. Losses of ingested gross energy as methane were reduced by 33% when grain concentration was increased in the diet. Concentrations of propionic and butyric acids were greater in diets with grain concentrate; acetic acid concentration was not affected. Concentrate in diet increases available energy for the metabolism, measured by lower losses of ingested gross energy as ruminal methane. © 2013 Sociedade Brasileira de Zootecnia.

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Global greenhouse gases, Nutritional value, Rumen fermentation, SF6

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Revista Brasileira de Zootecnia, v. 42, n. 8, p. 592-598, 2013.