Use of the clinoptilolite-heulandite as supporting to the modulators of nutritional in the feeding of poultry / Efeitos da flavomicina ou da monensina sobre a fermentação e a digestão ruminal e total em bovinos

AUTOR(ES)

Sabrina Marques Mogentale

DATA DE PUBLICAÇÃO

2005

RESUMO

The effects of flavomycin or monensin on ruminal fermentation and ruminal and total digestion in bovines were investigated. Twelve non-pregnant and non-lactating rumen-fistulated cows (736 kg of BW) were randomly assigned to three treatment groups: control (no antibiotic), flavomycin-treated (non-ionophore antibiotic) and monensin-treated (ionophore antibiotic). Treatment doses were 20 and 300mg/animal/day of flavomycin and monensin, respectively. Twenty-one day subperiod was used, the first sixteen for diet adaptation. Diet was composed by 60% concentrate (corn, soybean meal and mineral mixture) and 40% roughage (basically sugar cane). The 21st day was used for the evaluation of DMI and for ruminal fluid sampling at 0, 2, 4, 6, 8, 10 and 12 hours after the first meal. The last 10 days were used for external marker administration (15g of chromic oxide/ animal/day), and the last 5 days, for DMI evaluation, feces collection, feed sampling and evaluation of ruminal degradability using the nylon bag technique. Bags containing corn grain, soybean meal or sugar cane were incubated through the rumen fistula from the 17th up to the 21st day. Monensin decreased the molar proportion of acetic acid and increased the propionic acid in 27.2%, compared to control group and increased the effective degradability of corn grain starch, compared to flavomycin. Flavomycin decreased the degradation rate of soybean meal crude protein compared to control and monensin groups. Total VFA concentrations, molar proportion of butyric acid, pH, ammoniacal-N concentration or DMI were not influenced by the addition of either antibiotics; neither were the effective degradability of sugar cane NDF, digestible DMI or DM, CP, EE, NFE, CF, ADF, NDF, GE and starch digestibility nor the TDN of the diet.

ASSUNTO(S)

digestibilidade ionophore degradability antibiótico não-ionóforo volatile fatty acids degradabilidade ruminants non-ionophore antibiotic digestibility ionóforo Ácidos graxos voláteis ruminantes

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