Influência etária e nutricional na hematologia de bezerros da raça Holandesa

• Ano de defesa: 2013
• Autor(a) principal: Leandro Mendes Caxito
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Medula óssea; Hematologia; Bezerro; Gado Holandes; Nutrição; Holandes (Bovino) Alimentação e rações
• Link de acesso: http://hdl.handle.net/1843/BUOS-9AHKEU

The biggest challenges in livestock is the management and calf rearing. Furthermore, the adaptability of calf to the external environment and food intake even greater challenges. The food represents 50 to 60% of production costs, being underlying to the development of animals.There are few studies addressing the influence of nutritional factor in blood composition of young cattle and the bone marrow evaluation with the development of age. This research project was divided into two experiments and aimed evaluate the bone marrow citology in the first three months of life (Experiment I) and study the influence of age and nutritional factors into hematologic profile in calves (Experiment II). The experimental design was completely randomized. The technique collects of bone marrow performed the experiment allowed the evaluation of cell and megakaryocytes concentrations. There was a increasing in megakaryocytes and erythroid precursor cells concentrations in the bone marrow accompanied by rise in platelet count and concentration of red blood cells in the peripheral blood, respectively. The erythrogram and leukogram more varied with the age factor with alterations in erythrocyte index, white blood cells and total lymphocytes counts. We conclude with this work that there are significant changes in cell counts of bone marrow and peripheral blood. The type of management and challenges face for the calves did not allow a precise conclusion of the influence of nutritional factor on the blood.