Features of Wool Qualities and Formation of Skin Cover of Young Sheep of the South Kazakh Merino Breed in Zhambyl Region Conditions

Abstract

Until 2030, 17 key areas were selected, the implementation of which could potentially lead the country to the sustainable development of all major spheres of life and the solution of global problems affecting every person in this world. The article reflects and presents scientific research data, objective characteristics of wool qualities and age-related changes signs of the structure of the skin of young South Kazakh merino sheep, as well as studies of the morphological parameters of the skin tissue in the age aspect (from birth to 18 months), and an analysis of their connection with the commercial properties and quality of the semi-finished product obtained from sheep of this breed is given. Productive qualities were studied in a flock of sheep of the South Kazakh Merino breed in “Batay-Shu” LLP. Sheep have a high live weight, shearing and yield of pure wool; rams have a fairly high live weight for the breed; component depending on age from 100-106 kg, and high wool productivity both in physical weight and in washed fiber - 10.3-6.6 kg, with an average output of washed wool of 64.5% thickness, with corresponding development epidermis (0.97-1.3% of the total skin thickness), a well-developed pilar layer (up to 67.7% of the total skin thickness) and relatively weak development of the reticular layer (about 33% of the total skin thickness). The density of hair follicles per 1 mm2 at 18 months of age is 52-60 units, and the secondary follicles/ primary follicles ratio is 12.17-12.77. After weaning and up to 7.5 months, buck lambs experience a noticeable increase in skin within 200 μm. During the same period, a slight increase in skin tissue occurs in ewe hoggs.