Features of sheepskin productivity of different origin sheep

Abstract

Sheepskin is a component of two important elements -leather fabric and wool. At all stages -from skinning to the production of semi-finished products, the main task is to preserve the sheepskin's natural qualities and the bond strength of wool with leather fabric. The aim of the research was to study the qualitative indicators of Romanov sheep's and crossbreed's sheepskin obtained by crossing Romanov sheep ewes with rams of Gissar breed. The effectiveness of crossbreeding in terms of sheepskin performance and its physical and technical properties was established. By the mass of sheepskin raw materials, crossbreed lambs were dominated over Romanov purebred peers by 10.9%. These differences were associated with different live weights of experimental young sheep. By the area of sheepskins, crossbreed young growth exceeded purebred peers by 9.8%. These sheepskins have a coarser coat and were characterized by the powerful development of the dermis pilar and reticular layers, which is associated with the breed characteristics of these structures. The dermis thickness in experimental sheep was in the range of 1.1-1.3 mm. Sheepskin of the Romanov breed sheep, due to its preserving and further processing, were reduced by 21.3%, which was 2.9% more compared to the experimental group. This feature is associated with the histological structure of dermal structures in experimental young animals. An indicator that characterizes the relative lightweight of the produced sheepskin is the mass of the semi-finished product (dm 2 ). According to these data, crossbreed young sheep were dominated over purebred peers by 25.6%, and it indicated their compliance with standards, according to current requirements in the fur industry. And according to the physical and technical properties, crossbreed sheepskin was dominated over pure-bred young sheep's in terms of raw materials and semi-finished products, and in terms of wool yield-to-launch ratio, by 2.6%. However, studies indicated that the sheepskin of experimental genotypes met the requirements for raw materials of existing processing industry standards.