DURABILITY AND EFFICIENCY OF LIFETIME USE OF RED-AND-WHITE DAIRY CATTLE
| Autor: | Yu. P. Polupan, О. D. Biriukova, M. M. Peredriy, Yu. F. Melnik |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
040301 veterinary sciences
Day of life 0402 animal and dairy science food and beverages 04 agricultural and veterinary sciences General Medicine Biology 040201 dairy & animal science Breed 0403 veterinary science Animal science medicine.anatomical_structure Lactation Milk fat Life expectancy medicine Herd Dairy cattle |
| Zdroj: | Animal Breeding and Genetics. 59:78-91 |
| ISSN: | 2312-0223 |
| DOI: | 10.31073/abg.59.09 |
| Popis: | The study was conducted on 325 cows of Ukrainian Red-and-White Dairy and Holstein breeds of the herd of the farm “Khristinovske”. These cows were descended from 28 bulls of 12 lines and related groups. A sufficiently high level of indicators of the duration and effectiveness of lifetime use of cows was established. The average life expectancy of the cows under control was 2750, economic use was 1711, and lactation was 1459 days. An average of 26221 kg of milk, 1097 kg of milk fat and 889 kg of protein were obtained from cows in lifetime (3.63 lactations). On average, 8.7 kg was milked per day of life from cows, on day of economic use – 14.6 kg, on day of lactation –17.2 kg. Received 657, 1030 and 122 g of milk fat and protein, respectively. On average, the coefficient of economic use rate was 58.5%, the lactation rate was 85.6%, and productive use was 49.9%. For most of the studied features of the duration and effectiveness of lifetime use, multidirectional and low interspecific differentiation were established. Holstein cows had the same cows of Ukrainian Red-and-White Dairy breeds as expectancy of life, economic use, and lactation. Cows of the Holstein breed were dominated by cows of Ukrainian Red-and-White Dairy for milk fat and protein yield for one day of life, economic use, lactation and lactation rate. In animals of Ukrainian Red-and-White Dairy breed with increasing conditional bloodiness by Holstein, duration and effectiveness of lifetime use varied curvilinearly. For the most part, the cows group with 87.5% conditional bloodiness by Holstein had the advantage. A certain level of intergroup differentiation is established by the genetic factors of cows' lineage or related group and father parentage. For the most signes of duration and effectiveness of lifetime use are characterized by the better indicators animals of the P. F. A. Chief 1427381 related group and the genealogical line of R. Citation 267150, and by the worse indicators – P. Astronaut 1458744 line. In some cases, the intergroup difference reaches a significant level (up to P |
| Databáze: | OpenAIRE |
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