Utilização do farelo de algodão e do farelo integral de mandioca em dietas de frangos caipiras

Abstract

This study aimed to evaluate the nutritional composition and energy of cottonseed meal and cassava meal and its inclusion in broiler hillbillies diets, to evaluate the performance and costs of feeding. The nutritional composition and apparent metabolizable energy (AME) were determined by laboratory analysis (dry matter, ash, crude fiber, ether extract, crude protein, neutral detergent fiber, acid detergent fiber, calcium, phosphorus and crude energy). The digestibility trial was conducted from 10 to 18 days old birds, each ingredient has its values of nutrient digestibility determined from five repetitions. The metabolizable energy values used for calculations of the diets were 1965 and 2951 kcal/kg of AME for cottonseed meal and cassava meal, respectively. Two experiments were conducted to evaluate the performance effect of replacing soybean meal protein by protein from cottonseed meal and the inclusion of cassava meal in broiler hillbillies diets. The experiments consisted of five treatments with five and six replicates in a randomized design. At the end of each phase were evaluated as survival rate, weight gain, feed intake, feed conversion. After the slaughter were performed to evaluate carcass traits and their parts (wings, back, chest, thigh, drumstick and abdominal fat), moreover of edible offal (heart, liver and gizzard). Was performed an economic evaluation to assess the viability of the use of ingredients tested on diets. The results were analyzed by analysis of variance and regression using the SAS (2001). Cottonseed meal and cassava meal can be used until the levels of 10.67 and 100% inclusion, respectively, for feeding broiler hillbillies lineage Label Rouge, without prejudice to the animal performance including yield carcass percentage of birds and economic gain.