Suplementação mineral e desempenho reprodutivo no período pós-parto de vacas primíparas de corte / Mineral supplementation and reproductive performance in the postpartum of primiparous beef cows

AUTOR(ES)

Paulo Gustavo Macedo de Almeida Martins

DATA DE PUBLICAÇÃO

2007

RESUMO

The objective of this work was evaluate the reproductive performance of primiparous beef cows, in real system of production, in the postpartum period, supplemented in a group with common mineral supplement and in another one, specific mineral supplement for reproduction. Also was evaluated the response of these females submitted to the Ovsynch protocol of synchronization after the breeding season (BS). Seventy and two Nellore primiparous beef cows, proceeding from the herd of a property located in Curvelo, had been used, randomly separate in two groups, with common mineral supplement and another one with specific mineral supplement for reproduction. The cows had been observed daily during the BS for heat detention, and the identified ones, submitting the artificial insemination. During the BS, four cows of the 36 of the group with the specific mineral supplement for reproduction showed heat and they had been inseminated, whereas three of the 36 of the group that received common mineral supplement showed heat but only two had been inseminated. In the gestation diagnosis positive gestation for the inseminated cows was evidenced. After BS, the cows that had not showed heat had been submitted to the Ovsynch protocol of synchronization. Randomly they had been chosen in three groups, being 20 in the group with specific mineral supplement for reproduction and synchronized, 20 with common mineral supplement and synchronized and 20 not synchronized. After the gestation diagnosis, evidenced positive gestation in two cows that had received mineral supplement common and had been synchronized. The use of specific mineral supplement for reproduction in primiparous beef cows, presenting poor body condition and calf suckling, kept in low quality pastures, does not provide improvement in the reproductive indices during the BS and nor when they had been submitted to the Ovsynch protocol of synchronization.

ASSUNTO(S)

cromo producao animal estação de monta chromium anestro sincronização breeding season heat in animals synchronization

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