Desempenho de frangos alimentados com feno de mani oba no semiárido paraibano Performance of broilers fed Mani oba hay in the semiarid region of Paraíba

Objetivou-se analisar o efeito da substitui o parcial da ra o convencional pelo feno de mani oba (Manihot glaziovii Muell. Arg.) sobre o desempenho e qualidade de carca a de frangos de corte tipo caipira. Utilizaramse 192 animais de quatro linhagens diferentes: Máster Griss Plumê, Plymouth Rock Barrada, pesco o pelado Label Rouge e a New Hampshire, com idade inicial de 38 dias. As aves foram distribuídas em delineamento inteiramente casualizado, com três tratamentos (substitui o de 0,0; 7,5 e 15,0% da ra o basal pelo feno de mani oba) e quatro repeti es, constituídas por 16 aves (dois casais de cada linhagem). Houve diminui o no consumo de proteínas e aumento no consumo de fibras com o aumento de feno na dieta e as aves que consumiram 15,0% de feno tiveram menor ganho de peso (1476,56 g ave-1), maior convers o alimentar (2344,19 g), menor rendimento de carca a (70,74%) e peso absoluto do peito (417,03 g). O uso de até 7,5% de substitui o da ra o convencional pelo feno de mani oba n o influi no desempenho e na qualidade da carca a. The objective of this work was to evaluate the effect of the partial replacement of the conventional diet with mani oba (Manihot glaziovii Muell. Arg.) hay on the performance and carcass quality of free-range broiler chickens. 192 animals, from four different strains were used: Master Griss Plum, Barred Plymouth Rock, Naked Neck Label Rouge and New Hampshire, with initial age of 38 days. The birds were distributed in a completely randomized design with three treatments (replacement of 0.0, 7.5 and 15.0% of the basal diet with mani oba hay) and four replications consisting of 16 birds (two pairs of each strain). There was a decrease in protein intake and an increase in fiber intake with the increase of hay in the diet, and the birds fed with 15.0% of hay had lower weight gain (1476.56 g bird-1), higher food conversion (2344.19 g), lower carcass percentage (70.74%) and absolute breast weight (417.03 g). It was observed that the use of up to 7.5% of ration replacement with mani oba hay is a viable alternative.