Three assays were carried out to determine methionine + cystine requirement and the digestible methionine + cystine: digestible lysine ratio of males broilers, Avian Farms, from 1 to 20, 24 to 38 and 44 to 56 days of age. Each experiment was a completely randomized design with five levels of methionine + cystine, six replications and 20 birds per pen from 1 to 20 and 24 to 38 and 16 birds per pen from 44 to 56 day of age, […]

Three assays were carried out to determine the threonine requirement and the digestible threonine:lysine ratio of broiler males, Avian Farm, from 1 to 20, 24 to 38 and 44 to 56 days of age. A completely randomized design with five levels of threonine, six replicates and 20 birds per pen from 1 to 20 and 24 to 38, and 16 birds per pens from 44 to 56 were used in each experiment. The concentrations of digestible threonine were 0.684 to […]

A serie of experiments was carried out with the objective to determine the nutritive value of nine poultry by-product meal and six feather meal for chickens. Four different methodologies were used to determine the values of N corrected apparent (AMEn) and true corrected (TMEn) metabolizable energy, where the traditional method was used with chicks and cocks and the Sibbald method was used with roosters and cecectomized cocks. The estimated AMEn and TMEn values of viscera meal ranged from 3,051 to […]