Rosemary Lais Galati

Desempenho de cordeiros confinados, alimentados com dietas à base de torta de girassol

O objetivo deste trabalho foi avaliar os efeitos da inclusao da torta de girassol na dieta de cordeiros em confinamento sobre o desempenho produtivo dos animais. Utilizaram-se 40 cordeiros sem raca definida, nao castrados, com peso medio inicial de 20,17±2,66 kg, alimentados com 0, 7, 14, 21 e 28% de torta de girassol na dieta (base seca). O experimento foi conduzido em delineamento de blocos ao acaso. A inclusao de torta de girassol na dieta nao alterou o consumo medio de materia seca (883,58 g por dia), a conversao alimentar (4,40) e o consumo medio de agua (2,59 L por dia). O aumento dos niveis de torta de girassol diminuiu linearmente o peso final, o ganho de peso total, o ganho de peso diario e a area de olho de lombo. O nivel de inclusao de ate 28% nao afeta o consumo medio de materia seca e de agua, mas reduz o desempenho e a area de olho de lombo. Para obter o menor custo com a dieta, o nivel de inclusao da torta de girassol pode atingir ate 28% da materia seca, quando o seu preco representar ate 40% do preco da mistura entre milho e farelo de soja.

Degradabilidade ruminal da matéria seca de grãos de milho e de sorgo com alto ou baixo conteúdo de tanino processados

This work evaluated the effects of high moisture silage, extrusion and corn and sorghum drying with and without tannin, on the chemical composition and ruminal digestion of dry matter. The experimental design was completely randomized in 3x3 factorial scheme (kinds of grains: processing), for the chemical composition and degradability and three blocks (animals) through in situ method. It was verified significant difference between kinds of grains and processing in relation to the chemical composition, except for crude protein and mineral matter. The contents of etherextract in the three types of grains, were reduced significantly with the high moisture silage, extrusion and drying in relation to the humid material. For the contents of phenols, total and condensed tannin there was effect of hybrid, processing and interaction, and the most elevated contents were found in sorghum with tannin. Although grain composition has been similar, the interaction in ruminal ambient associated to the tannin, promoted differences in the dry matter degradability. It was concluded that sorghum without tannin may be ensiled or extruded, while the sorghum with tannin, must be extruded to improve the degradability and availability of nutrients.

Girassol (Helianthus annuus L.) e seus coprodutos na alimentação animal

The use of co-products of agro-industries in animal feed has already been done for many years. With the encouragement of domestic production of Biodiesel generation of these products had increased significantly, allowing its use in animal feed, by increasing the supply of meals or pies from the extraction of oil from oilseeds. Soybean meal is the main source of protein fed to ruminants and monogastric animals, but with increasing global demand for food high in protein, not competitive with human food, boosts the use of these co-products in animal feed, mainly for ruminants, due to its unique ability to transform non-digestible fibers by the human body, products of high biological value such as meat and milk. Among the crops used to produce Biodiesel, sunflower had a significant increase in production and productivity in recent years, thanks to its adaptability to various soil and climatic conditions. The co-products of sunflower have favorable nutritional characteristics of feed animals of zootechnical interest, minimizing production costs and maximizing production of meat and milk.

Níveis de Caroço de algodão na dieta de cordeiros confinados

The objective was to indicate appropriate inclusion levels of of whole cottonseed in feedlot lambs diets. Two experiments were conducted: in the first were used five rumen fitted sheep distributed in a 5x5 Latin square design, in which were evaluated diets absent and with 7; 14, 21 and 28% inclusion of whole cottonseed. In the second experiment, 24 lambs were used with 27.3kg of initial body weight, to assess the performance, in order to evaluate diets absent and with 10; 20 and 30% inclusion of whole cottonseed. Diets containing a forage:concentrate ratio of 50:50, were used the corn silage utilized as roughage. There were no effects of the inclusion levels of whole cottonseed on intake of dry matter and organic matter. The intake of NDF and EE were increased, and ruminal pH was increased linearly with the addition of whole cottonseed on the diet. In contrast, the concentration of rumen ammonia nitrogen was reduced linearly with the addition of whole cottonseed on the diet. The increase of the percentage of whole cottonseed to the diet linearly reduced lambs weight gain. The whole cottonseed can be used to feedlot sheep up to 10% of inclusion levels in diets.