Efeito da suplementação de sal proteinado a reprodutores da raça Nelore sobre diversos parâmetros reprodutivos

• Ano de defesa: 2003
• Autor(a) principal: Santos, Aline Quadros
• Orientador(a): Guimarães, José Domingos
• Banca de defesa: Costa, Eduardo Paulino da , Torres, Ciro Alexandre Alves , Carvalho, Giovanni Ribeiro de , Ruas, José Reinaldo Mendes
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Medicina Veterinária
• Departamento: Biotecnologia, diagnóstico e controle de doenças; Epidemiologia e controle de qualidade de prod. de
• País: BR
• Palavras-chave em Português: Touro; Sêmen; Nutrição; Reprodução
• Palavras-chave em Inglês: Nelore bulls; Semen; Nutrition; Reproduction
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::REPRODUCAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/5202

The objective of this study was to verify the effect of supplementation with proteinated salt to Nelore bulls, under grazing condition, on several reproductive parameters. Fifty-six bulls were used, from 3 to 14 years and they were divided in two treatments of 28 animals each, one received common mineral salt (C = controls 100g/animal/day) and the other treatments received a mixture of proteinated salt (S = supplemented 500g/animal/day). The following measures were taken: body weigh, testicular measurement; the length and the width of the testicles and scrotal perimeter. The semen was collected four times during the year, in the months of March, July, September and October/02, using the method of eletroejaculation. There was no difference (P> 0,05) for scrotal perimeter and body weight among the treatments and among the four collections. However there was difference (P <0,05) for the left testicle length (CTE) among the collections and between the two treatments (controls and supplemented). The values for CTE were larger starting from the second collection and they were larger for the supplemented group. For the right testicles length (CTD) there was just differences among the collections of the control treatment, and the values of the second and fourth collection were similar to each other and the values of the first and the third collections were different to each other and different among the others collections. The values of testicular width, showed a difference (P <0,05) between the first collection and the others, for both treatments (controls and supplemented), being the larger values starting from the second collection. There was no difference between the two treatments. The physical aspects of semen did not differ (P> 0,05) between the control and supplemented treatments and between the collections. Separating the animals of each treatment for age, classifying them as young those born among 1996 to 1999 and old those animals born among 1988 and 1995, it was verified that the variation in body weight were larger for the oldest animals. For the young animals the variation in body weight for the control treatment was - 24,25 Kg and for the supplemented treatment was - 5,16 Kg. For old animals the variation in body weight was - 45,33 Kg for the control treatment and 29,0 Kg for the animals of the supplemented treatment. In relation to the morphologic aspect of the semen, there was only difference (P < 0,05) among the collections of the control treatment for the larger defects, and the supplemented treatments animals showed differences among the collections (P> 0,05), the other morphologic characteristics did not differ between treatments nor collections (P> 0,05).