No abstract

Scientific-economical experiment was carried out on evaluation of sow reproductive qualities of different families obtained and grown in LLC «Kigbayevsky bacon» of Sarapul district of Udmurt Republic and sows, bought in LLC «Otrada gen» of Lipetsk region. Analyzing reproduction of breeding stock of home selection, according to the first farrow it can be said that the most multiple lambing is observed in sows of Otrada family (new selection) – 15,72 heads. Out of home selection sows families Osobaya (13,33 heads), Reklama (12,3 heads) can be noticed. The worst multiple lambing was noticed at sow of Luchesa and Lily families. The largest nests were observed in sows of Beatrice family (96,5 kg), Luchesa – 88,75 kg. Productive analysis of the second farrow sows established that high multiple lambing was in sows of families Beatrice – 14,49 heads, Luchesa – 13,08 heads, Ovatsii – 13,58 heads. Sows’ multiple lambing of new selection was 17,48 heads. Comparative analysis of reproductive qualities of large white sows of home selection in LLC «Otrada gen» showed that sows of LLC «Otrada Gen» selection are characterized by higher multiple lambing and number of young pig weaning, 17,48 and 13,16 heads, respectively, but they cave on sows of LLC «Kigbayevsky bacon» in livability of young pigs weaning on 15,5 %, weight of one young pig to weaning for 2,48 kg.

No abstract

The purpose is to monitor the number and analyze the condition of the main breeds of cattle of meat productivity, bred on the territory of the Russian Federation. Currently, in Russia, mainly Aberdeen-Angus and Hereford breeds are being bred from meat-producing breeds, and from domestic breeds – Kalmyk and Kazakh white-headed, as a rule, in the southern territories and it is ineffective in terms of their meat qualities, although the genetic potential is quite high, but without updating the gene pool, attempts to improve the productivity of our breeds of cattle, will be in vain.Methods. The methodological basis of the study is the methods of systematization, logical and comparative statistical analysis. The information base of the research is the official materials of yearbooks in breeding work in beef cattle breeding (VNIIplem), periodicals.Results. The breeding zone of the Kazakh white–headed breed includes a continuous strip along the southern territories of our country - from the Volga to the Amur region, including bordering areas with the Republic of Kazakhstan, as well as foothill and mountain provinces of Central Asian countries. The distribution area of the Kalmyk breed is quite extensive and covers the southeastern territories of the country - from the North Caucasus regions to Eastern Siberia. It should be noted that the trend of reducing the number of domestic meat breeds as a result of the introduction of a foreign gene pool into our country, where the conditions of keeping and feeding for imported imported cattle, as a rule, do not correspond to the full realization of productive qualities, and therefore, the adaptation process proceeds strenuously and leads to the loss of the industry. It seems more rational to introduce the world's genetic resources to improve economically useful qualities and improve the inherent genetic potential of domestic livestock, including through industrial crossing. In this regard, the Kazakh white-headed breed is quite competitive in relation to many imported breeds, and given its adaptive qualities, it should occupy its niche among other specialized meat breeds in the market of beef producers.

Animal husbandry of Udmurtia is represented by several animal farms that have high rates of business output of young animals - 5.43-5.77 puppies per main female, which is higher than the average for animal husbandry farms in Russia. The aim of the research was to study the effectiveness of use of various preparartions in improving the reproductive qualities of minks and vital activity of their offspring. When conducting research, it was offered to use a complex of preparations. The first group of females received gonadotropin horiogonin and «Purevitin», and the second veterinary preparation «Lyutragon» and «Purevitin». The control group only hormone horiogonin. The results showed that the number of successfully foaled females of the first and second groups is greater than in the control by 10.5 and 21.0%, respectively. The fertility of minks of the second experimental group was 5.83 heads, which is 14% more than in the control analogues. Safety in the 1st and 2nd experimental groups was higher by 8.1 and 12.2 percentage points compared to the control analogues, respectively. The business output of young animals, taking into account the safety in the 2nd group, was 5.71 goals, 263 puppies were raised for slaughter, and in the first experimental group - 5.4 and 227 goals, respectively. The rate of business output of young animals in the control group was lower by 23 and 29% compared to the first and second experimental groups, respectively. Thus, when breeding mink to stimulate and improve the natural resistance of organism, the reproductive qualities of females during the rut, increasing the yield of young animals and its safety it is advisable to include a mixture of preparations hormone «Lutragon» and «Purevitin», promoting increase of profitability of up to 110 %.