Desempenho e rendimento de carcaça de frangos de corte alimentados com dietas contendo subprodutos do arroz formuladas com base nos conceitos de proteína bruta e ideal

Abstract

RESUMO -Foi conduzido um experimento para avaliar a utilização de subprodutos do arroz em dietas formuladas com base nos conceitos de proteína bruta e ideal para frangos de corte de 1 a 42 dias de idade. Foram utilizados 720 pintos machos de 1 dia de idade da linhagem "Hybro", em delineamento inteiramente ao acaso, em esquema fatorial 3 × 2, composto de três dietas (sem subprodutos, farelo de arroz integral e quirera de arroz) e dois conceitos de formulação de rações (proteína bruta e ideal), totalizando seis tratamentos e quatro repetições de 30 aves. O ganho de peso, o consumo de ração e a conversão alimentar foram avaliados aos 21 e 42 dias e as características de carcaça aos 42 dias de idade. As aves alimentadas com dietas formuladas pelo conceito tradicional (baseado na proteína bruta) apresentaram melhor conversão alimentar e menor taxa de deposição de gordura abdominal.Palavras-chave: aminoácidos digestíveis, desempenho, farelo de arroz integral, quirera de arroz Performance and carcass yield of broilers fed diets containing rice byproducts, formulated based on crude and ideal protein concepts ABSTRACT -One experiment was conducted to evaluate the utilization of rice by-products in diets based on crude and ideal protein concepts for broilers from 1 to 42 days of age. Seven hundred and twenty male chicks, one day old, Hybro strain, were distributed in a completely randomized design in a 3 × 2 factorial arrangment, three diets (without by-product, whole rice meal and broken rice) and two ration formulation concepts (crude and ideal protein), totalizing six treatments and four replications of 30 birds. Weight gain, feed intake and feed:gain ratio were evaluated at 21 and 42 days, and carcass characteristics at 42 days of age. In conclusion, birds fed diets formulated by the traditional concept (based on crude protein)showed better feed:gain ratio and lower deposition rate of abdominal fat.

Meat and carcass traits of the red-winged tinamou (Rhynchotus rufescens)

“…The obtained carcass and wing yield values were higher than those reported for broilers by Denadai et al (2002) and Oba et al (2007). Cancherini et al (2008), working with broilers, reported breast and leg yields similar to values reported by the latter. However, it must be noted that tinamous are in the process of domestication, and have not been submitted yet to any artificial selection process relative to carcass quantitative traits.…”

Corn replacement by broken rice in meat-type quail diets

“…Cancherini et al (2008) also did not observe any influence of 22.5% dietary inclusion of broken rice on broiler performance. In Japanese quail layers, Swain et al (2006) concluded that broken rice could substitute corn only at 5% inclusion level.…”

“…Cancherini et al (2008) also did not find any significant effects of dietary broken rice inclusion on broiler carcass yield. According to Nanto et al (2012), high soybean oil inclusion levels in diets where dehulled paddy rice completely replaced corn had negative effect on carcass traits due to the accumulation of abdominal fat.…”

“…The inclusion of broken rice in broiler diets has been evaluated and no effects on feed intake, weight gain and feed conversion of birds were observed (Cancherini et al, 2008). Similarly, working with Japanese quails, Sethi et al (2006) asserted growth performance is not affected by the replacing 50% of dietary corn by broken rice.…”