Efeitos da enramicina e monensina sódica sobre a digestão de nutrientes em bovinos alimentados com dietas contendo alto nível de concentrados

Abstract

RESUMO -Estudaram-se os efeitos da administração de enramicina e monensina sódica sobre a digestão total dos nutrientes da dieta e o consumo de matéria seca digestível em bovinos. Doze fêmeas bovinas não-gestantes e não-lactantes (675 ± 63 kg PV) foram distribuídas inteiramente ao acaso em três tratamentos (controle, enramicina e monensina) e alimentados com dieta contendo 60% de concentrados (milho, farelo de soja e minerais) e 40% de volumoso (cana-de-açúcar).A enramicina foi administrada na dose de 20 mg/animal/dia e a monensina na dose de 300 mg/animal/dia. O experimento teve duração total de 21 dias, de modo que os últimos dez dias foram utilizados para administração do marcador externo (15 g de óxido crômico/animal/dia) e os últimos cinco dias para a coleta de fezes e amostragem dos alimentos. Nenhum dos antibióticos alterou os consumos de matéria seca digestível e NDT e a digestibilidade de matéria seca, proteína bruta, extrato etéreo, fibra em detergente ácido, fibra em detergente neutro, amido, energia bruta e nutrientes digestíveis totais. Palavras-chave: consumo, digestibilidade, ionóforos, não-ionóforos, ruminantes Effects of enramycin and sodium monensin on nutrients digestibility in bovine fed with high-concentrate dietsABSTRACT -The objective of this trial was to study the effects of enramycin and sodium monensin administration on total digestibility of diet nutrients and digestible dry matter intake in bovine. Twelve non-pregnant and non-lactating cows (675 kg ± 63 BW) were randomly assigned to three treatments: control group, enramycin-treated group or monensin-treated group. Animals received a diet containing 60% of concentrates (corn, soy bean meal and minerals) and 40% of forage (sugarcane). Treatments were 20 mg/animal/day of enramycin or 300 mg/animal/day of monensin. Trial lasted 21 days, the last 10 used for external marker administration (15 g of chromic oxide/animal/day) and the last 5 for feces collection and feed sampling. None of the antibiotics affected digestible dry matter and TDN intake and the digestibilities of dry matter, crude protein, ether extract, acid detergent fiber, neutral detergent fiber, starch, gross energy or total digestible nutrients.

Ruminal responses, digestibility, and blood parameters of beef cattle fed diets without forage with different hybrids and processing of the corn

“…Persichetti et al (2014) noticed a linear increase in starch digestibility when dry milled corn was replaced by high moisture corn (0.91 g/g for 100% high moisture corn). Values of starch digestibility similar to the current study were also reported by Borges et al (2008) (from 0.88 to 0.92 g/g), Gonçalves et al (2010) (0.86 and 0.88 g/g), and by Owens et al (2016) (from 0.96 to 0.98 g/g) in diets containing about 40% of starch.…”

Intake, apparent digestibility, and methane emission in bulls receiving a feed supplement of monensin, virginiamycin, or a combination

“…Similarly, Eifert et al (2005) did not detect any effects of monensin and/or soybean oil on the coefficients of apparent digestibility of the DM, OM, CP, and NDF in cows that received diets with 550 g/kg of corn silage and 450 g/kg of the concentrate. Likewise, Borges et al (2008), in a similar experiment, tested the effects of the ionophoric antibiotic monensin and the nonionophoric antibiotic enramycin in diets containing 400 mg/kg of sugarcane and 600 mg/kg of the concentrate in bovine females. These authors did not find any difference in the coefficients of apparent digestibility of the DM, CP, and starch or in the coefficient of digestibility of the NDF.…”

Growth performance and safety of meat from cattle feedlot finished with monensin in the ration

“…Numerically, the monensin treatment presented higher AD (72.79% vs 70.69%). Borges et al (2008) also obtained a non-significant increase in the digestibility coefficient of ruminally cannulated cows of 66.4% vs 60.4% for treatment with monensin and control, respectively. Zeoula et al (2008) found an increase of 8% in AD of DM with the use of monensin, and an increase in total digestibility of CP in the intestine, while Oliveira et al (2007) did not obtain alterations in the digestibility of DM and nutrients for sheep supplemented with monensin.…”