MORPHOMETRIC PARAMETERS OF YAK SKIN ALTAI POPULATION

Abstract

The results of studies of morphometric parameters of the yak skin of the Altai population are presented. It was found that the yield of paired skins is on average from 5,5 % in yak bulls of 18 months to 6.3 and 8,3 % in yak bulls and yak cows, respectively. The measurements of the length and width of the skin are almost the same or the length is slightly inferior to the width, which is due to the fact that the body of the yak is shorter than that of the local cattle. When examining the raw leather, all the skins were without any defects in life. The weight of the skins of yak-bulls of the Altai population was 34,3±1,2 kg and they are classified as heavy, the skins of yak-bulls at the age of 18 months correspond to the category “half-skin” (from 10 to 13 kg), and the weight of the skins of yak cows of the Altai population-”yalovka” is suitable for the average weight category - from 17 to 25 kg. The thickness of the skins of Yak bulls on the last edge was 7.1 mm, which is higher than the requirements of GOST by 2.3 mm, in bull calves the excess was 3.1 mm, in yak cows-1.1 mm. According to their morphometric characteristics, the skins of Altai yaks meet the requirements of GOST 28425-90. The raw materials are leather and refer to the raw leather intended for the production of leather for the bottom of shoes and shoe leather. They can also be widely used by the local population as raw materials for the production of saddlery and technical leather.