RESUMO
Vinte e quatro cordeiros machos não castrados, Santa Inês x Dorper, com aproximadamente 90 dias de idade e peso vivo médio inicial de 27,0 ± 4,4kg, foram alimentados com uma dieta com elevada proporção de concentrado com 20% de pelete proteico-mineral (Grano Entero®), 5% de feno de capim coast cross e 75% de milho, na forma de milho grão inteiro (MGI), milho grão moído (MGM) ou milho grão úmido (MGU). [...] O processamento dos grãos de milho não teve influência acentuada sobre as características de desempenho ou de carcaça, exceto para PVF, PCQ e PCF. No entanto, o MGI apresentou ganho de peso significativo em relação aos outros tratamentos, além de ser mais prático na sua utilização não apresentando despesas de processamento
Twenty four Santa Inês x Dorper crossbred not castrated lambs, approximately 90 days old and average initial weight of 27.07 ± 4.36kg were fed a high concentrate diet 20% protein-mineral pellet (Grano Entero®), 5% coast cross hay and 75% corn as whole corn grain (WCG), grounded corn grain (GCG) or high moisture corn (HMC). [...] There were no differences (P>0.05) for qualitative variables of softness, color and WLC. Corn grain processing had no influence on the performance or carcass characteristics except for AFW, HCG and CCY. However, whole corn showed significant weight gain compared to other treatments, since it has no processing expenses
Assuntos
Animais , Alimentos Fortificados , Ovinos/metabolismo , Ração Animal , Zea mays , Aumento de Peso , Peso CorporalRESUMO
Se evaluó la presencia de aflatoxinas totales en muestras de alimentos concentrados para pollos de engorde y se aplicaron técnicas de control para los hongos aflatoxigénicos y sus toxinas (aflatoxinas), utilizando un extracto comercial de Citrus limon. Para ello se recolectaron al azar 50 muestras de un lote de alimentos concentrados para pollos de engorde. Se cuantificaron las concentraciones de aflatoxinas a través del método de enzimoinmunoensayo competitivo (ELISA) y se aplicó un sistema de control contra aflatoxinas, utilizando un extracto de Citrus limon. Finalmente, se determinó la capacidad antifúngica del extracto sobre el crecimiento de los hongos aflatoxigénicos aislados de las muestras. Se detectó que el 90% de las muestras analizadas estaban contaminadas con aflatoxinas, encontrándose en el 54% de las mismas un rango de concentraciones entre 5 a 14 µg/kg. El extracto de Citrus limon resultó ser un potente antiaflatoxigénico y antifúngico, reduciendo las concentraciones de aflatoxinas en las muestras de alimentos para pollos de engorde hasta en un 73,6%, e inhibiendo por completo el crecimiento de los hongos descritos como aflatoxigénicos.
The presence of total aflatoxins in samples of concentrated chicken feed was evaluated, and control techniques for aflatoxigenic fungi and their toxins (aflatoxins) using a Citrus limon commercial extract were applied. For this purpose, 50 samples were collected randomly from a lot of concentrated chicken feed. The aflatoxin concentrations were quantified through a competitive enzyme-linked-immunosorbent-assay (ELISA), and an aflatoxin control system was applied using a Citrus limon extract. Finally, the antifungal capacity of the extract over the growth of the aflatoxigenic fungi isolated from the samples was determined. It was established that 90% of the analyzed samples were contaminated with aflatoxins, and 54% of them had a 5-14 µg/kg concentration range. The Citrus limon extract was a potently antiaflatoxigenic and antifungal, reducing the aflatoxin concentrations in the chicken feed samples in up to 73.6%, and totally inhibiting the growth of fungi described as aflatoxigenic.