Retorno à atividade luteal cíclica no pós-parto em vacas de corte primíparas suplementadas em pasto por diferentes períodos

• Ano de defesa: 2010
• Autor(a) principal: Borges, Morgana Cardoso Brasileiro
• Orientador(a): Guimarães, José Domingos
• Banca de defesa: Ribeiro Filho, José Dantas , Ruas, José Reinaldo Mendes
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Doutorado em Medicina Veterinária
• Departamento: Biotecnologia, diagnóstico e controle de doenças; Epidemiologia e controle de qualidade de prod. de
• País: BR
• Palavras-chave em Português: Vacas primíparas; Perfil hormonal; Perfil metabólico
• Palavras-chave em Inglês: Primiparous cows; Hormonal profile; Metabolic profile
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::REPRODUCAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/1440

This study evaluated the supplementation (30%PB) influence on ovarian activity reestablishment and on metabolic and hormonal profile of 135 primiparous Nelore cows. They were allocated randomly into four treatments: T1 (only mineral salt on pre and post-partum period), T2 (supplemented during 30 to 65 days pre-partum), T3 (supplemented during more 65 days pre-partum) and T4 (supplemented during 30 to 65 days pre-partum + 15days post-partum), at the end of the treatments the animals were allocated in two reproductive management artificial insemination (AI) with natural estrus and fixed-time artificial insemination (FTAI). The blood samples for total protein, albumin, urea, glucose, insulin, total cholesterol and progesterone were collected during four weeks in pre and post-partum periods. Pregnancy rates were 29 and 40,2 % respectively for animals with <4 and &#8805; 4 body score condition (BSC) at parturition (p<0.05). The general pregnancy rate was 37% (50/135). In the group of FTAI the pregnancy rate was 61,2% (41/67) vs 13,2% (9/68) for IA. No significant interactions among supplementation, body weight, BSC, returning to estrus rate, pregnancy rate, metabolic and hormonal profile were observed in the cows studied. All blood components evaluated were into reference ranges for bovine except for the parameters of urea and progesterone that demonstrate atypical behavior.