ESTUDO RETROSPECTIVO DA OCORRÊNCIA DE FALHAS REPRODUTIVAS EM VACAS LEITEIRAS

Abstract

The determination of a more profitable production with the intensive use of the area for the production of forage, a control of the reproductive efficiency and lower age at the first calving is of fundamental importance for the adequacy of the milk activity. Studying and quantifying the occurrence of abortions and stillbirths in dairy cows is essential. The monitoring of reproductive failures was done daily for six years, from 2008 to 2013. The technician responsible for the sector recorded the occurrences in specific forms at the farms. In 2014, data were retrieved from the farms' files and published in a digital spreadsheet, later submitted to statistical analysis. The variables of abortion and stillbirth rates (%) were submitted to analysis of variance, at a significance level of 5%. The year was the cause of variation. The abortion (3.93%) and stillbirth (2.89%) rates observed in the period were low and there was and no significant difference between the years followed (p> 0.05) in both. Stillbirth and abortion are not considered problems in high-yield farms due to good control and management practices.