SPECIAL FEATURES OF BULLS SKIN OF FAST- AND LONG-GROWING BEEF CATTLE BREEDS
S. Kozir
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Institute of Agriculture of Steppe zone of NAAS,
14 Volodymyra Vernadskoho str., Dnipro 49027, Ukraine
The leather industry of Ukraine feels a sharp shortage of skins of animals, especially cattle, which differ in massiveness, size, thickness and durability. The skins of the experimental bulls according to the accepted classification belong to the large leather raw material the “bull” category (over 25 kg) already at one-year age. From such hides, they get footwear for the bottom (from it are made soles and insoles and for top footwear, footwear and foam). With the age of animals consistently changing and qualitative indicators of skins. Compared with the 12-month-old age, the skin of the Aberdeen Angus and Charolais has increased by weight in the 18-month period by 1.5–1.7 times, and by 1.8–2.0 times in 30 months. Their area and thickness at standard points, elasticity and strength also increase significantly. Taking into account the fact that bulls habitus of Charolais is far superior to the size of the body of the Aberdeen Angus; the size of their hides is much larger. In well-fed cattle, the difference is considerably higher.
Given the peculiarities of the studied genotypes, their growth energy, and technological parameters of leather raw material the slaughter of Aberdeen-Angus breed bulls at the age of 18–20 months, and Charolais in 30 or more months would be optimal. This is consistent with the slaughter indices of these breeds in the conditions of their ecological and genetic origin (UK, France). Based on our studies it can be concluded that intensive fattening of as fast-growing Aberdeen-Angus bulls, and so long-time matured Charolais bulls in the steppe zone of Ukraine can to reduce the shortage of leather raw materials.
Keywords: BEEF CATTLE, ABERDEEN ANGUS, CHAROLAIS, skin, LEATHER
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