Bìol. Tvarin, 2016, volume 18, issue 4, pp. 47–52                                                   http://dx.doi.org/10.15407/animbiol18.04.047

DURATION AND EFFECTIVENESS OF LIFETIME USE OF UKRAINIAN BLACK AND WHITE DAIRY COWS

M. I. Kuziv

logir@ukr.net

Institute of Animal Biology NAAS,
38 V. Stusa str., Lviv 79034, Ukraine

Duration of economic use and lifetime productivity of cows determines the overall efficiency of dairy cattle. The main aim was to investigate the efficacy and duration of lifetime use of Ukrainian black and white dairy cows in western Ukraine.

Life duration, duration of economic use, age of lactation and lifetime productivity were studied using zootechnical materials accounting.

Animals of Ukrainian black and white dairy cattle from the leading farms in the Western Ukraine are characterized by low economic duration of use (3.24.3 lactation). Duration of economic use and lifetime productivity of cows is caused by genotype, including their linear identity. The highest lifetime, economic duration of use, number of lactations and productivity were highest in animals of lines Bell 1667366.74, K. Frans 9069, S. T. Rokita 252 803 and M. Chifteyna 95 679.

The duration and efficiency of cows use depends on the size of yield in the first lactation. The highest life expectancy, economic use and number of lactations were in cows that had 4000 kg of milk at the first lactation. The highest lifetime productivity was in the cows with 60006999kg of milk at the first lactation.

Life milk yield correlated with lifetime, economic duration of use, number of lactations during whole life and yields for each day of life. Positive reliable connection is established between life yields and yields on individual cows lactation.

Most animals were culled by reproductive dysfunction (37.545.0%) and low productivity (15.821.5%).

Keywords: BREED, COWS, DURATION OF USE, LIFETIME PRODUCTIVITY, CORRELATION COEFFICIENT

1. Cassell B. G. Evaluating sire selection practices using lifetime net income functions. J. Dairy Sci., 2002, vol. 85, pp. 3492–3502. https://doi.org/10.3168/jds.S0022-0302(02)74438-X
2. Heinrichs A. J., Heinrichs B. S. Prospective study of calf factors affecting first-lactation and lifetime milk production and age of cows when removed from the herd. J. Dairy Sci., 2011, vol. 94, pp. 336–341. https://doi.org/10.3168/jds.2010-3170
3. Lakin G. F. Biometrics: Textbook. Moscow, High school, 1990, 352 p. (in Russian)
4. Polupan Yu. P. Efficiency of lifetime use of cows of different countries of selection. Bulletin of Sumy National Agrarian University, 2014, vol. 2/2, pp. 14–20. (in Ukrainian)
5. Polupan Yu. P. Efficiency of lifetime use of red dairy cattle. Animal Breeding and Genetics, 2000, vol. 33, pp. 97–105. (in Ukrainian)
6. Polupan Yu. P., Koval T. P. Early selection of cows on the effectiveness of life-long use. Animal science, 2011, vol. 6, pp. 4–5. (in Russian)
7. Polupan Yu. P. Subjective accents on some issues Genetic basis of breeding. Animal Breeding and Genetics, 2007, vol. 41, pp. 194–208. (in Ukrainian)
8. Terawaki Y., Katsumi T., Ducrocq V. Development of a survival model with piecewise weibull baselines-for the analysis of length of productive life of Holstein cows in Japan. J. Dairy Sci., 2006, vol. 89, pp. 4058–4065. https://doi.org/10.3168/jds.S0022-0302(06)72449-3
9. Yashchuk T. S. The influence of genetic factors on lifespan cows Ukrainian black and white dairy cattle. Animal Breeding and Genetics, 2011, vol. 45, pp. 331–340. (in Ukrainian)

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