Doutorado em Ciência Animal (EVZ)
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Navegando Doutorado em Ciência Animal (EVZ) por Por Orientador "CAFÉ, Marcos Barcellos"
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Item GLICOMANANO ESTERIFICADO EM RAÇÕES PARA FRANGOS CONTENDO MILHO OU SORGO EXPERIMENTALMENTE CONTAMINADAS POR FUNGOS OU COM AFLATOXINA B1(Universidade Federal de Goiás, 2009-04-13) ROCHA, Fernanda Rodrigues Taveira; ANDRADE, Maria Auxiliadora; http://lattes.cnpq.br/9441751521255467; CAFÉ, Marcos Barcellos; http://lattes.cnpq.br/9860968235125158Two experiments were conducted with 960 Cobb 500 chicks raised in battery heated to 21 days. In the first experiment, birds were fed diets with corn and sorghum non-musty and moldy, or not treated with the mycotoxin adsorbent based glicomanano ester (GME) at concentrations of 0 and 0.1% of the diet. The experiment was conducted in a completely randomized in a 2 x 2 x 2 (x grain quality x adsorbent) and five replicates of 12 birds each. For the second experiment, we used four doses of aflatoxin B1 (0, 0.5, 1.0, 2.5 ppm of AFB1) and the same concentrations of GME in a completely randomized in a 4 x 2 (doses of AFB1 x concentrations GME). Diets isonutrient from corn or sorghum and soybean meal meeting the nutritional requirements proposed by the Brazilian tables. We evaluated the weight gain, feed intake, feed conversion and digestibility of dry matter (DM), ether extract (EE) and protein (N) in two metabolic tests conducted 4 to 7 and 17 to 21 days of age, for the first experiment and a test for the second aged between four and seven days. We also assessed the biometry of lymphoid organs and digestive systems, the production of antibodies against the vaccine virus disease Newcatle and histological evaluation of the bursa of Fabricius and liver. Statistical analysis was performed by GLM procedure of SAS and Tukey (5%) to compare the means in the case of variable performance and metabolism and other variables the data were described. Chickens fed moldy grains not perform better, regardless of the inclusion of mycotoxin adsorbent for. For grains contaminated with fungi, the additive improved the digestibility and retention of nutrients, especially fat, the main substrate for the development of this organism. Moldy grains decreased the development of the organs of the digestive system and did not affect the organs of the lymphoid system and vaccine response, but it altered the histological structure of the organs evaluated. The histological damage was reduced by GME in the bursa and liver. The AFB1 affected the performance of chickens and GME did not reverse the deterioration in performance, but the effects on digestibility were minimized, especially for fats. The presence of AFB1 interfered with the development of lymphoid organs and digestive systems, depressed the response of poultry vaccination and the onset and increased severity of lesions in the liver and bursa of Fabricius, but with the use of GME, the intensity of effect in body of the birds was lowerItem Avaliação nutricional da torta de babaçu e sua utilização em dietas para frangos de corte Label Rouge(Universidade Federal de Goiás, 2009-12-17) SILVA, Rubens Fausto da; RODRIGUES, Kênia Ferreira; http://lattes.cnpq.br/5180233397332953; LEANDRO, Nadja Susana Mogyca; http://lattes.cnpq.br/3136809931691012; CAFÉ, Marcos Barcellos; http://lattes.cnpq.br/9860968235125158Three research works were conducted in order to determine the chemical composition, nutrient and energy digestibility, apparent metabolizable energy (EMA) and apparent metabolizable energy corrected by nitrogen retention (EMAn) of babaçu cake, as well as to evaluate the results of its use on performance and carcass traits of Label Rouge chicks. The first experiment consisted a biological assay carried where the traditional total feces collection method was used to characterize babaçu cake bromatologically, as well as to determine its energy levels and metabolizability coefficients. Seventy two Label Rouge day-old-chicks where placed in metallic batteries and at the 14th day they where assigned to a randomized block design with two treatments and six replicates of 6 birds each. The results found where: Crude energy = 5,056 kcal/kg, Crude protein = 18.8%, Crude fiber = 29.50%, Ether extract = 8.8%, Calcium = 0.19%, Phosphorus = 0.67%, EMA= 2,650 kcal/kg and EMAn=2,580 kcal/kg. The dry matters, Crude energy s and ether extract s apparent coefficient of metabolizability were 31.72%; 46.78%; 92.35%, respectively. The nitrogen balance of reference diet and test diet where respectively 15.90% and 6.54%. The second research work was conducted aiming to evaluate the effect of different levels of inclusion of babaçu cake in diets based on corn and soybean meal on the performance of free range chickens from 1 to 7, 1 to 14, 1 to 21 and 1 to 28 days old. Three hundred day-old (male and female) Label Rouge chickens, were assigned to a completely randomized design with five treatments (0, 8, 16, 24 and 32% of inclusion of babaçu cake) and four replicates of 15 birds each. Inclusion levels of babaçu cake influenced feed intake at ages 1 to 7 days (P=0.0031) and did not influence other ages. Live weight and weight gain were influenced at age 1 to 7 days when it was used the SNK test for mean comparison. Live weight was affected at ages 1 to 14 (P=0.0003), 1 to 21 (P=0.0028) and 1 to 28 (P=0.0168) days old, as well as weight gain at ages 1 to 14 (P=0.0004), 1 to 21 (P=0.0037) and 1 to 28 (P=0.0196) days old. Feed convertion was affected at ages 1 to 7 (P≤0.0001) and 1 to 28 (P=0.0027).The third research work was aimed to evaluate the effect of different levels of inclusion of babaçu cake on performance, carcass yield and carcass protein and fat deposition of Label Rouge broiler chicks that received the experimental diets from 36 to 84 days old. Three hundred and sixty birds (male and female) were assigned to a completely randomized design with five treatments (0, 8, 16, 24 and 32% of inclusion of babaçu cake) and four replicates of 18 birds each. Weight at 84 days old and weight gain were not influenced by the different levels of babaçu cake, however feed intake increased (P= 0.002) and feed convertion was negatively affected (P=0.052) by crescent levels of babaçu cake in the diets. Carcass yield, carcass fat and protein deposition and abdominal fat deposition weren´t influenced as the inclusion levels of babaçu cake increased. It is possible the use of up to 32% of inclusion of babaçu cake in the diet of Label Rouge broiler chicks from 36 to 84 days old