Effects of levels and adaptation periods to sodium lasalocid on the rumen fermentation parameters

[摘要] Effects of adaptation periods to sodium lasalocid and its ionophorum levels were evaluated on ruminal fermentation, using four Holstein-Zebu cross-breed cows. Latin square was the experimental design used, with four periods of six weeks, in which isolated data from the first, second, third and fourth weeks were used to evaluate periods of adaptation, and the last two destined to eliminate residual effects. Treatments were no supplementation and supplementation with 50, 100 and 200 mg of sodium lasalocid/ head/day, and rumen vollaty fatty acid acetic, propionic and butiric, pH, ammonia, liquid turnover and flow rate were measured every week. There were no differences in results for levels or periods of adaptation, and considering these results, it is not recommended the use of sodium lasalocid to modify ruminal fermentation parameters in cattle.

[学科分类] 兽医学

[关键词] cattle;ionophores;ruminal fermentation;sodium lasalocid   IntroduçãoO ionóforo lasalocida;quando consumido pelos ruminantes;tem apresentado efeitos bastante variáveis sobre certos parâmetros de fermentação ruminal (Spears & Harvey;1987)