Ruminal and metabolic parameters of sheep induced to sub-acute ruminal acidosis and fed with probiotic, monensin and selenium yeast / Parâmetros Metabólicos e Ruminais de Ovelhas Induzidas à Acidose Ruminal Sub-Clínica, Suplementadas com Probiótico, Monensina e Selênio Levedura

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The aim of this study was to observe the efficiency of probiotics, monensin and selenium yeast fed to sheep induced to sub-acute ruminal acidosis (SARA) on the maintenance of normal ruminal and metabolic parameters. Thirty six sheep that averaged 12 months old and 31 8 kg of body weight were used. The sheep were kept in a confinement system, receiving a diet based on tifton hay (Cynodon sp.) and concentrate. The sheep were divided in six groups, each one containing six animals. The treatments were: CO group, control, receiving the diet without any supplement; CS, with the addition of 1.5 g/animal/day of Sel-Plex (selenium yeast); CM, with the addition of 11 ppm/kg of diet dry matter (DM) of monensin; CSM, with the addition of 11 ppm/kg of diet DM of monensin and 1.5 g/animal/day of Sel-Plex; CY, with the addition of 3 g/animal/day of Yea-Sacc (probiotic Saccharomyces cerevisiae); CSY, with the addition 3 g/animal/day of Yea-Sacc and 1.5 g/animal/day of Sel-Plex. The sheep receive this diet for 21 days before the start of the experiment. After the adaptation period the sheep were submitted to 2 days of fasting, receiving just the supplement and water ad libitum. After this, the sheep were submitted to 4 days of induced SARA, with concentrate ad libitum and received in the first morning meal the supplement specific for each group. Three days after the induction period, the sheep received the usual diet, but still receiving the supplements. Ruminal fluid collections were performed four times daily (8 and 12 AM and 4 and 7 PM) during the induction period and once daily (12 AM) in the recuperation period. The ruminal fluid was evaluated for pH, number of protozoa and chlorides concentration. Blood collection was performed once daily in the last day of adaptation, on the four days of induction and on the three days of recuperation. The metabolic parameters evaluated were: aspartate aminotransferase (AST), gamma glutamil transferase (GGT), lactate desidrogenase (LDH), glucose, calcium, chlorides, phosphorus, magnesium, sodium and potassium. The results showed that control group was superior regarding ruminal pH (P<0.05). Ruminal chlorides and number of protozoa did not differ between groups (P>0.05), only between day of the experiment (P<0.05). Also, there was no difference in the blood metabolic parameters between groups (P>0.05), but only between day of the experiment (P<0.05). Thus, the supplements used in this experiment were not efficient in maintaining ruminal and metabolic parameters at physiological levels in sheep submitted to sub-acute ruminal acidosis.

ASSUNTO(S)

probiótico selênio medicina veterinaria monensin acidose ruminal sub-clínica metabolismo probiotics metabolism monensina sub-acute ruminal acidosis selenium

ACESSO AO ARTIGO

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