Resumen

RUAS, J.R.M. et al. Effect of calf presence during milking on reproductive performance of Holstein x Zebu crossbred cows. Arq. Bras. Med. Vet. Zootec. [online]. 2006, vol.58, n.4, pp. 530-536. ISSN 0102-0935.  http://dx.doi.org/10.1590/S0102-09352006000400013.

This study was carried out to evaluate the effect of calf presence in the milking parlour on the reproductive performance of seventy five crossbred (Holstein × Zebu) cows randomly allocated into three groups: group I - cows milked without the calf presence; group II - cows mantained with their calves during short period of time before milking to promote milk ejection and thereafter the calves were put out the milking room until the cows had finished milking; and group III - cows mantained with the calf during milking. The average body condition score at calving was 3.1. The service period, number of days to return to estrous and estrous and pregnant rates until 120 day postpartum were not influenced (P>0.05) by milking management of cows. The calf presence in the milking parlour did not influence the reproductive performance of Holandês-Zebu crossbred cows.

Palabras llave : cow; calf presence; service period; crossbred.