Ways to increase the productivity of sheep of the Tsygay breed in the conditions of southern Ukraine

Abstract

The article presents the results of the research on feeding zoster, sea grass-urea (MTM) and urea in feeding Tsygay breed rams, as well as the effectiveness of using East Friesian rams on Tsygay breed ewes. The experimental part of the work was carried out in the agricultural formations of the Odesa region. In the main diet, a certain amount of digestible protein and mineral substances was replaced by an appropriate amount of zoster, nitrogen-containing feed product MTM and urea. The diet of the I experimental group contained 25 g of zoster, the II experimental group – 50 g of MTM, the III experimental group – 10 g of urea, the control group did not contain any impurities. 50 g of MTM contained 25 g of zoster and 10 g of urea. Research on meat and wool productivity (live weight, absolute live weight gain; wool shear in physical weight and washed fiber, wool length) was carried out according to generally accepted methods. In order to determine the effectiveness of the use of East Friesian rams on Tsigai ewes, an experiment was conducted to study the milk yield of crossbred ewes and the intensity of growth of newborn lambs. In cross-breed lambs obtained from rams of the East Friesian breed and ewes of the Tsigai breed, the intensity of growth of live weight in the age aspect, slaughter qualities and amino acid composition of the meat were studied. The milk yield of crossbred dams was studied by the amount of milk obtained during the suckling period, during the period after the lambs were weaned, and during the entire lactation period. Meat and dairy productivity were studied according to generally accepted methods. The digital material was processed by the method of variational statistics according to V. P. Kovalenko et al. (2010). It was established that balancing the diet in terms of protein, minerals and vitamins due to feeding zoster, MTM and urea ensures an increase in live weight of 10-month-old goats by 2.9–7.2%, wool shearing in physical weight by 52.8–55.5 %, in washed fiber by 51.1–53.5 %. The use of rams of the East Friesian breed on ewes of the Tsigai breed contributes to the production of cross-breed animals with well-developed economic and useful traits. In cross-breed rams, compared to Tsigai rams, the pulp yield per 1 kg of pre-slaughter mass is 5.2 % higher, and the slaughter yield is 5.11 %. The high milk yield of cross-bred mothers contributed to better growth and development of lambs. During the period of growth from birth to yearling, the local young outnumbered the purebred Tsygayskii in terms of live weight: lambs by 16.9 %, yaks by 22.7 %, and by average daily growth by 18.1 % and 24.6 %, respectively.