Poultry offal meal in broiler chicken feed

An outstanding feature of poultry production that provides animal protein yield for human feeding is its short production cycle. This characteristic has a linear relationship with waste production. Increasing the inclusion of this residue in diets in the near future is desirable in step with the growth of poultry production since it offers a better environmental and nutritional alternative to current methods. We evaluated the effects on the performance and carcass characteristics of broiler chickens produced by the inclusion of poultry offal meal (POM) in their feed. Treatments consisted of a control diet (corn, Zea mays and soybean, Glycine max) and four diets with inclusion of 30, 60, 90 and 120 g kg-1 of POM. The diets were formulated based on the level of digestible amino acid once categorized as isocalcic, isophosphoric, isosodic, isoenergetic and isonutritive for protein, methionine+cystine, lysine and threonine. The feed's electrolytes were corrected so that each diet had the same electrolytic balance. The variables analyzed were feed intake, weight gain, feed conversion ratio, body weight, carcass yield, chicken cut yield and abdominal fat. Feed intake was not affected by the quantities of POM added. The weight gain, feed conversion, carcass yield and noble cuts presented quadratic responses to the treatments. Abdominal fat increased linearly. The performance of the poultry, and carcass characteristics were maximized by the inclusion of 53 and 65 g kg-1, respectively, of POM in the diet, and the inclusion of 120 g kg-1 of POM provided greater disposition of abdominal fat

Rendimento de carcaça de três grupos genéticos de frangos de corte alimentados com rações contendo diferentes teores de proteína

Este experimento foi realizado com o objetivo de avaliar o rendimento de carcaça de três grupos genéticos de frangos de corte, produzidos na UFV, denominados UFV1, UFV2 e UFV3, alimentados com ração única na fase inicial e rações isoenergéticas contendo 16,5; 18,0; 19,5; e 21,0% de proteína bruta (PB) na fase final. Duzentos e quarenta pintos de cada grupo genético, no total de 720 pintos, foram alojados em 48 boxes até 42 dias de idade. No 43º dia, dois machos e duas fêmeas, de cada box, foram pesados e abatidos para determinação do rendimento de carcaça. O delineamento experimental usado foi o inteiramente casualizado em arranjo fatorial 3 x 4 x 2 (grupo genético, nível de proteína e sexo), com quatro repetições, num total de 192 aves. Os valores dos dados de duas aves por sexo foram usados para o cálculo da média. Houve diferença entre grupos genéticos para rendimentos de carcaça, peito e coxa, e o grupo UFV1 apresentou os melhores resultados. Entre sexo, os machos foram superiores nos rendimentos de coxa e sobre-coxa, porém observaram-se maiores rendimentos de peito e gordura abdominal para as fêmeas. À medida que o nível de PB da ração aumentou, o rendimento de carcaça e gordura abdominal reduziu e o de coxa aumentou (efeito linear). Não foi verificado efeito significativo de interação simples dos fatores grupo genético, níveis de proteína e sexo.The objective of this experiment was to evaluate the carcass yield of three genetic groups of broilers chickens, obtained at UFV, called UFV1, UFV2 and UFV3. The chicks were fed an unique diet during the initial phase period and isocaloric diet containing 16.5, 18.0, 19.5, and 21.0% of crude protein (CP) at the finishing phase. Two hundred and forty chicks of each genetic group, totaling 720 chicks, were allotted to 48 floor pens up to 42 days of age. At43rd day, two males and two females of each pen were weighed and slaughtered for the determination of the carcass yield. A completely randomized experimental design was used in a 3x4x2 factorial arrangement (genetic group, protein level and sex) with four replications, totaling 192 chicks. The values of two chickens data per sex were used in the mean calculation. There were differences among genetic groups for yields of carcass, breast and thigh, and UFV1 group showed the best results. Males had higher yields of thigh and drumstick, however, higher breast and abdominal fat yields were observed for females. As dietary CP levels increased, carcass yield and abdominal fat reduced and thigh yield increased (linear effect). No significant effect was observed for single interaction involving genetic group, protein levels and sex