Chemical and amino acid composition and true digestibility coefficients of amino acids of feather and blood meals for birds from different suppliers were determined. Thirty cecectomized cocks were distributed in a completely randomized design, with 4 different feather and blood meals (meals 1, 2, 3 and 4) and one treatment in which the birds remained fasting, with six replications as the experimental unit composed of one rooster. The variations in the chemical composition of the feather and blood meals can […]

It was aimed to determine energetic and amino acidic composition, coefficients of metabolizity of energy and digestibility of viscera meal for poultry. The method of forced feeding with cecectomized adult cockerel was used. A completely randomized design was used, with 4 different viscera meals (3 of poultry, one from swine, and one in fast), six replications and one cecectomized cockerel per experimental unit. The apparent metabolizable energy values were the following: 2,878; 3,179; 3,005 and 2,145; the values of aparent […]

Three assays were carried out to evaluate the nutritive value of the barnyardgrass seeds (Echnochloa spp.) for poultry. In the first assay, twelve adult cockerels were used to determine the true metabolizable energy value corrected by nitrogen retained (TMEn), using the forced fed method. In this assay six cockerels were forced fed 30 g of the feed and six cockerels were fastened to determinate metabolic and endogenous losses. In the second assay, twelve cecectomized cockerels were used to determine the […]

The digestibility coefficients and the true digestible amino acids content of soybean and soybean by-products were determined using cecectomized adult cockerels. Each one of the 8 feedstuffs evaluated was fed to six cockerels, consuming 15 g at 8:00 A.M. and 15 g at 16:00h P.M., after 24 hours fasting. Simultaneously, six cockerels were fasted to determine metabolic and endogenous losses. After determination of the digestibility coefficients and calculation of the digestible amino acids, prediction equations were simulated to predict the […]

The digestibility coefficients and thetrue digestible amino acids contents of corn and corn byproducts were determined by using cecectomized adult cockerels. Each one of the 11 feedstuffs evaluated was fed to six cockerels, consuming 15 g at 8a.m. and 15 g at 4p.m. after fastening by 24 hours. Simultaneously, six cockerels were fasted to determine metabolic and endogenous losses. After determination of the digestibility coefficients and calculation of the digestible amino acids, prediction equations were simulated to predict the corn […]