Luciana Cardoso Cancherini

Utilização de nutrientes de dietas contendo mananoligossacarídeo e/ou complexo enzimático para frangos de corte

The ileal digestibility and retention of some nutrients and the energy content were evaluated in diets for broilers containing mannan oligosaccharides (MOS) and/or enzymatic complex (EC). Two hundred and seventy-five birds were used in a randomized complete block design, with factorial arrangement (2 x 2 + 1) of the treatments, with two MOS levels (0 and 0.1%), two EC levels (0 and 0.05%) and a positive control diet with antibiotics. Chromic oxide (0.5%) was added to the diets to estimate the indigestibility factor. The experiment started when the birds reached 13 days of age, the excreta collection was performed from the 20th to the 22nd day and the digesta collection at the 23rd day of age of the birds. The interaction MOS x EC was significant for CP and P retention and for apparent metabolizable energy (AME), whose values were higher in diets with MOS and EC. EC inclusion improved DM retention and there was an improvement on ileal digestibility coefficient of DM, CP, Ca and P, Ca retention, and digestible energy values due to MOS inclusion. Ileal digestibility coefficients of DM, and DM, CP, Ca and P retention, as well as AME values were higher in diets containing MOS and/or EC compared with the diets containing antibiotics.

Utilização de subprodutos de origem animal em dietas formuladas com base em proteína bruta e proteína ideal para frangos de corte de 22 a 42 dias de idade

Foi conduzido um experimento para avaliar a utilizacao de subprodutos de origem animal em dietas para frangos de corte, formuladas com base na proteina bruta ou proteina ideal. O delineamento foi inteiramente casualizado em esquema fatorial 2x2+1, com duas fontes de proteina de origem animal (farinha de visceras de aves e farinha de sangue bovino), dois conceitos de formulacao (proteina bruta e proteina ideal) e uma dieta testemunha a base de milho e farelo de soja, com quatro repeticoes. As caracteristicas avaliadas foram ganho de peso, consumo de racao e conversao alimentar. Houve efeito significativo das interacoes entre fontes de proteina de origem animal e conceitos de formulacao para consumo de racao e ganho de peso. Quanto a conversao alimentar, nao houve diferenca significativa na interacao e os melhores valores de conversao alimentar foram encontrados quando se incorporou a farinha de visceras as dietas. Os melhores ganhos de peso foram obtidos com as dietas com farinha de sangue formuladas com base na proteina bruta e com farinha de visceras de aves com base na proteina ideal.

Desempenho e rendimento de carcaça de frangos de corte alimentados com dietas contendo subprodutos do arroz formuladas com base nos conceitos de proteína bruta e ideal

One experiment was conducted to evaluate the utilization of rice by-products in diets based on crude and ideal protein concepts for broilers from 1 to 42 days of age. Seven hundred and twenty male chicks, one day old, Hybro strain, were distributed in a completely randomized design in a 3 × 2 factorial arrangment, three diets (without by-product, whole rice meal and broken rice) and two ration formulation concepts (crude and ideal protein), totalizing six treatments and four replications of 30 birds. Weight gain, feed intake and feed:gain ratio were evaluated at 21 and 42 days, and carcass characteristics at 42 days of age. In conclusion, birds fed diets formulated by the traditional concept (based on crude protein) showed better feed:gain ratio and lower deposition rate of abdominal fat.

Composição química, valores de energia metabolizável e aminoácidos digestíveis de subprodutos do arroz para frangos de corte

Two experiments were conducted to determine the chemical composition, energy and the digestibility coefficients of the amino acids of the whole rice meal (WRM) and broken rice (BR). In the first trial, one hundred forty four broilers, 21 days of age, male, of Cobb strain had their excreta totally collected in order to determine the apparent metabolizable energy (AME) and corrected apparent metabolizable energy (AMEn). The experimental design was completely randomized, with three treatments and six replicates with eight birds each one. In the second trial, it was used the forced feeding method with cecectomized cockerels to determine the digestibility coefficients of the amino acids. The design was entirely randomized, with two feeds and one fasting and six replicates with one bird each one. The values of DM, CP, EE, CF, AME and AMEn were, respectively, to WRM: 88.6%; 11.8%; 15.3%; 10.2%; 2968kcal kg-1 and 2804kcal kg-1 and to BR: 93.5%; 9.1%; 0.73%; 0.45%; 3338kcal kg-1 and 3239kcal kg-1. The average values of digestibility coefficients of essential and non-essential amino acids were, respectively, 75.9% and 73.9% to WRM and 77.9% and 76.5% to BR. The WRM and the BR can be used in the diets of broilers in substitution to the corn, however showed lower metabolizable energy levels, had higher levels of crude protein and digestible amino acid.

Uso de Fosfato Bicálcico Granulado Sobre o Desempenho e Mineralização Óssea de Frangos de Corte

The objective of the experiment was to evaluate the effects of particle size of dicalcium phosphate (fine or granulated) and of the levels of total phosphorus on the performance of broilers and levels of calcium, phosphorus and magnesium of the bones. Three hundred one-day chicks, males, Cobb strain, were used in an experimental design involving six treatments in a factorial arrangement 2x3 (2 particles size of dicalcium phosphate and 3 phosphorus levels of 0,5%, 0,6% e 0,7%). It was concluded that the addition of granulated dicalcium phosphate resulted in a better performance. The level of 0,5% total phosphorus depressed body weight gain, feed intake and feed conversion and level 0,6% showed better performance. Total bone ash and bone calcium were not affected by treatments, however, better bone phosphorus was found when the broilers received the diet with 0,7% total phosphorus. Particle size did not influence the content of ash, calcium, phosphorus and magnesium levels of the bone.

Use of animal by-products in diets formulated based on crude and ideal protein fed to broilers from 22 to 42 days of age

An experiment was conducted to evaluate the use of animal by-products in broiler diets, formulated based on crude and ideal protein. The experimental design was a completely randomized in a factorial arrangement 2x2+1, with two animal protein sources (poultry viscera meal and bovine blood meal), two formulation concepts (based on crude and ideal protein) and a control diet based on corn and soybean meal, with four replications. The evaluated characteristics were weight gain, feed intake and feed: gain ratio. There was a significant effect of the interaction animal protein source x formulation concepts on feed intake and weight gain. There was not significant effect of the interaction on feed: gain ratio and the best values were found when the poultry viscera meal was added to the diets. The best weight gains were obtained with the diet formulated with bovine blood meal using the crude protein concept and, using the ideal protein concept the best result was obtained when the poultry viscera meal was added to the diets.

Redução do amido dietético, utilizando óleo de soja, em dietas para coelhos em crescimento

Este experimento foi conduzido para avaliar os efeitos da reducao do amido dietetico, utilizando oleo de soja, em dietas para coelhos Nova Zelândia Branco em crescimento sobre o desempenho e rendimento de carcaca dos animais. Os coelhos foram desmamados aos 30 dias e abatidos aos 60 dias de idade. O delineamento experimental foi em blocos ao acaso com quatro tratamentos (2,2, 3,3, 4,4 e 5,5% de adicao de oleo de soja as dietas) e cinco repeticoes com 15 animais por tratamento. Foram avaliados os ganhos de peso diario, a ingestao de alimentos diaria, a conversao alimentar, a mortalidade e o rendimento de carcaca. Nao houve efeito (P>0,05) dos tratamentos sobre os parâmetros avaliados. Concluiu-se que, nas condicoes realizadas neste trabalho, a adicao de oleo de soja em dietas para coelhos em crescimento ate o nivel de 5,5% nao afetou o desempenho produtivo.