Published in Scientific Papers. Series D. Animal Science, Vol. LVIII
Written by Mădălin GAVRILĂ, Gheorghe Emil MĂRGINEAN, Alexandra KELEMEN
Through this research we intend to analyze the Holstein herds in farms of various sizes from Teleorman County to highlight the productive performance of the breed and to emphasize the similarities, respective the differences that were found in the studied farms and furthermore, another goal of the study was to show that the breed is very valuable.The Holstein cows studied for this paper are from various origins (Germain, France, Netherlands). The material studied is represented by the dairy cows that were send to slaughterhouse from 5 farms, representing 1200 heads.The lifetime of the animal is defined by two aspects, namely, the biological longevity and the productive longevity.We can observed, from the data processed and interpreted by us, that the greatest biological longevity was registered in farm 1 (6.27 years), where the productive longevity was 3 years old.The highest frequency of reproductive disturbances was registered in the farm No.4 (58.33%) and farm No. 3 (55%).The data held by us from the 5 farms that were analyzed shows higher rates of reproductive disorders comparative to that established by Curelariu of 43.66% et al (1980) and Vidu of 28,52%(2002).The herds analyzed are characterized by a mean of 5.71 years for the biological longevity with a variability between 5.10 years and 7.24 years, which is consistent with the literature.
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biological longevity
