Reproductive efficiency of Nelore heifers born from two different breeding seasons

Authors

  • Laércio José Pacola Instituto de Zootecnia, Estação Experimental de Zootecnia de Sertãozinho, SP
  • Celso Boin Instituto de Zootecnia, Divisão de Zootecnia de Bovinos de Corte, Nova Odessa, SP

Abstract

The work was carried out at the Estação Experimental de Zootecnia, Sertãozinho São Paulo State, Brazil. The main objective was to estimate the influence of two breeding seasons, April to August (treatment A) and October to February (treatment B), on: 1 - calving frequency along the year; 2 - reproductive efficiency up to the 3rd calving; 3 - liveweight changes of the cow during the lactating period; and 4 - liveweight of calves at 1, 120 and 210 days of age. The months of highest calving rates wee March (48.3%) and August (37.9%) for breeding seasons A and B, respectively. Calving percentages were the same for both breeding season at the first and third calving, but higher for treatment B than for treatment A (72.9 and 45.8%, respectively) at the second calving. Cows on treatment A lost and on treatment B gained weight during the nursing period. Calves from treatment B were heavier than the ones from treatment A at weaning.

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Published

2014-01-29

Issue

Section

ANIMAL REPRODUCTION

How to Cite

Reproductive efficiency of Nelore heifers born from two different breeding seasons. (2014). Bulletin of Animal Husbandry, 42(1), 79-83. http://bia.iz.sp.gov.br/index.php/bia/article/view/636

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