Published in Scientific Papers. Series D. Animal Science, Vol. LXVIII, Issue 2
Written by Nikolay MARKOV, Miroslav HRISTOV, Tsvetan MARKOV, Tsvetelina DIMITROVA
Data are presented on the dynamics and distribution of cattle's skin-fiber cover of two groups of Galloway and Aberdeen Angus heifers, free-ranging beef breeds in the region of Troyan, Central Balkan Mountains. The measurements of the skin thickness in the neck region, at the top of the elbow joint and at the middle of the last rib were recorded during two seasons of the year in (mm), and the weight, structure and percentage of different categories of fur fiber cover - aspen, transitional and down in (g) were also determined. Skin thickness measurements were made using a caliper (caliper) during the summer and winter seasons. The weight of the fur per 1 cm² of fur fibercover was analyzed using an analytical balance and the length of the fur fiber with a ruler in (cm). We determined the structure of the cattle's skin-fiber cover by % ratio fur fiber cover. During the winter period, the studied cattle significantly increased the thickness of the skin, the length and thickness of the fur fiber coat and the amount of down fluffy fiber coat. The animals have adapted well to the technology of rearing in the temperate - continental, mountainous climate of the region of the town of Troyan.
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