Felipe Santos Dalólio

Enzimas exógenas em dietas para frangos de corte

The aimed of the study was to evaluate the effect of the inclusion of different levels of an enzyme complex consisting of phytase, protease, xylanase, β-glucanase, cellulase, amylase, and pectinase on the parameters of performance, carcass yield and meat quality of broilers. Six hundred broiler chicks were used, and the animals were females with one day of age, from the Cobb 500 strain, and distributed in a completely randomized design, with five levels of inclusion of the enzyme complex (0, 100, 200, 300 and 400g/ton), and six repetitions, with twenty animals each. The weight gain, feed conversion ratio, feed intake and production viability were assessed in stages between 1 to 21, 1 to 35 and 1 to 42 days of age. The carcass yield and meat quality were evaluated at 35 and 42 days of age. We evaluated the characteristics of weight loss by cooking, shear force, water holding capacity, pH, lightness and color. The parameters of performance, carcass yield and carcass parts, and meat quality were not affected by the enzyme supplementation of diets fed to broiler chickens (P>0.05), except for the performance characteristics of the breast and the wings at 42 days of age (P<0.05).

Metabolizable energy and digestible amino acids of full-fat soybean without or with protease supplementation in diets for broilers

Two experiments were carried out to determine the energy values ​​and the true ileal digestibility of amino acids of nine toasted full-fat soybeans (FFSB), without or with the addition of monocomponent protease. In the first experiment, to determine the energy values, the method of excreta collection was used with 1120 broiler chicks at 14 days old, distributed in randomized blocks in a 10x2 factorial arrangement with nine full-fat soybeans (30% included) plus a control diet (70%) without or with the addition of protease, totaling 20 treatments with 8 replicates and 7 birds per cage. In the second experiment, 1120 broiler chickens from 24 to 28 days of age were distributed in randomized blocks in a 10x2 factor arrangement, with nine full-fat soybeans (40% included) + a protein free diet (60%), without or with the addition of protease, totaling 20 treatments with 8 replicates and 7 birds per cage. Ileal digesta collection was used to determine the true digestibility coefficients and the digestible amino acid content of full-fat soybean. The average values ​​of nitrogen-corrected apparent metabolizable energy (AMEn) and their respective metabolization coefficients (CAMEn) were 3207 kcal/kg and 62.57%, respectively. The average values ​​of digestibility coefficients of crude protein and essential and nonessential amino acids were 86.79, 87.90 and 84.34%, respectively. The inclusion of protease improved (P<0.05) all evaluated parameters. Therefore, its use is recommended in diets containing full-fat soybeans for broiler chickens.

NOTA TÉCNICA: CAMA DE FRANGO E RESÍDUO MOVELEIRO: ALTERNATIVA ENERGÉTICA PARA A ZONA DA MATA MINEIRA

The production of broiler chickens and industrial furniture manufacturing, are two very significant economic activities for Mesoregion the Zone of Mata Mineira. Both activities generate large amounts of waste in their production processes. It is estimated that the volume of poultry litter is generated around 78,624 tons/year. But the Polo furniture of Uba produces an average of 480 tons/year. In almost all of the time these wastes are disposed in the environment at random, being characterized as environmental liabilities. Given the composition of characteristics of poultry litter the furniture waste and the need to produce in a sustainable way can adopt these biomasses as a local alternative energy for decentralized power generation. This can occur through the production of briquettes and pellets mixed and its various utilization processes (combustion, gasification, cogeneration) in some productive sectors of the region. The objective was to discuss the possibilities of using poultry litter and furniture residue Polo Uba, associated or not, and propose sustainable energy alternatives for the region of Zone of Mata Mineira.

ANÁLISE DE VIABILIDADE ECONÔMICA DE SISTEMAS DE AQUECIMENTO DE INSTALAÇÕES AGROPECUÁRIAS PARA CRIAÇÃO DE FRANGOS DE CORTE

The correct setting is an extremely important parameter for better yields in the creation of broilers. In this sense, there was a review of concepts needed to assess the problem and understand the chickens heating needs, and from then develop a simplified energy balance of poultry houses facilities. Later it was possible to determine the need for heating during the creation of broilers. The results were obtained from simulation data already published in the literature. Climatic data were considered as the city of Vicosa - MG where nearby there are several producers of broiler chickens. Finally, it analyzed the cost of heating with natural gas, liquefied petroleum gas, biogas, wood chips and electricity. It was found that the wood chips is the energy source that provides the best financial results.