Performance and intestinal parameters of Label Rouge chickens fed on highmoisture corn silage

Abstract

RESUMO -Foram utilizados 1200 pintos da linhagem Label Rouge, com peso médio inicial de 41,0 ± 0,55 g, distribuídos em um delineamento inteiramente casualizado, em esquema fatorial 2 x 5, (com e sem acidificante X 0, 25, 50, 75 e 100% de silagem de grãos úmidos de milho -SGUM). Foram determinados o ganho de peso (GP), consumo de ração (CR), conversão alimentar (CA), além da análise morfométrica e de microbiota intestinal, rendimento de carcaça e de cortes. De 1 a 63 dias, houve efeito quadrático (P<0,05) da SGUM sobre o CR e CA. Houve interação (P<0,05) entre os níveis de SGUM e a adição de acidificante para o rendimento de carcaça, e de cortes (asa e peito) e fígado das fêmeas. Os machos apresentaram interação (P<0,05) entre os níveis de SGUM e o acidificante para carcaça, sobrecoxa, peito e gordura. Houve interação (P<0,05) da inclusão de SGUM e a adição ou não de acidificante para a contagem de Lactobacillus aos 63 dias. Houve efeito quadrático da SGUM para o tratamento com acidificante, e as criptas apresentaram maior diâmetro para o tratamento sem acidificante. Os resultados sugerem que frangos caipiras alimentados com até 50% de SGUM com acidificante apresentam boas características de carcaça e de cortes e não sofrem danos sobre os parâmetros intestinais.Palavras-chave: Alimentos alternativo. Carcaça. Frangos caipiras. Vilosidades.ABSTRACT -In this experiment, 1200 Label Rouge chicks were used, with an average initial weight of 41.0 ± 0.55 g. The chicks were distributed over a completely randomised design in a 2 x 5 factorial scheme (with and without acidifier, and 0, 25, 50, 75 and 100% high-moisture corn silage -HMCS). Weight gain (GP) was determined, together with feed intake (CR), and feed conversion (CA), morphometric analysis, an analysis of intestinal microbiota, and the yield from the carcass and cuts. From 1 to 63 days, a quadratic effect (P<0.05) was seen from the HMCS on CR and CA. There was an interaction (P<0.05) between the levels of HMCS and the addition of acidifier on carcass, cuts (wing and breast) and liver yield in females. For males, there was an interaction (P<0.05) between the levels of HMCS and acidifier on carcass, drumstick, breast and fat. There was an interaction (P<0.05) between the inclusion of HMCS and the addition of acidifier on the Lactobacillus count at 63 days. There was a quadratic effect from the HMCS for the treatment with acidifier, and the crypts showed a greater diameter for the treatment without acidifier. The results suggest that range chickens, fed with up to 50% HMCS with acidifier, display good characteristics for the carcass and cuts, and suffer no damage to the intestinal parameters.

Use of palm oil cake in diets for slow growing chickens

“…Just the relative weight of the gizzard had a significant effect (p<0.01), in which the inclusion of 15 and 20% of POC promoted higher values (3.68 and 3.75%). The increase in fiber in the diet stimulated the gizzard's muscle activity, which can be caused by the increase in the food retention time, or by the presence of particles of different sizes that require greater crushing, increasing movement and causing organ hypertrophy, similar results to our study were reported by Esposito et al 2015and Frank et al (2016). Hernández et al (2011) in a study on the content of soluble fibers present in the food, infer that they can increase the liquid retention capacity, resulting in the dilation of the content and consequently increasing the volume of the gizzard.…”