V. KH. TEMIRAEV, Y. A. YULDASHBAEV, O. K. GOGAEV*, V. G. DVALISHVILI, R. S. GODZHIEV, G. S. THUKVATULIN AND A. R. DEMUROVA
Gorsky State Agrarian University, 362040, Russian Federation, Vladikavkaz, 37 Kirov Street
*(e-mail : texmen2@mail.ru; Mobile : +7 918 828 9760)
(Received : May 8, 2019; Accepted : July 12, 2019)
ABSTRACT
The aim of this work was to determine the feasibility of the selection of newborn lambs of Grozny breed on the type of skin folding. In this regard, the task of this research was to study the relationship of the type of skin folding with subsequent meat productivity. Studies were conducted in the period from 2014 to 2017 in the Limited Liability Company “Breeding Factory” Chervlennye Buruny” in Nogai district of Dagestan. Three groups were formed to study the meat productivity of the Grozny breed castrated sheep, each group included 10 heads, depending on the folding of their skin : the first group included sheep of the “C -” type (animals without folds), that is, animals with an insufficient supply of skin, characterized by the absence of folds on the neck, on the trunk and at the root of the tail. Poorly developed “Burda” – longitudinal fold at the bottom of the neck was allowed; to the second group – animals of type “C” – (normally folded) with a satisfactory supply of skin, which was characterized by the presence of two or three large full or incomplete transverse folds on the neck, up to 7-8 small folds on the barrel and a medium-sized “rosette” at the root of their tail. Folds on the sacrum and thighs were allowed only in the form of wrinkles, the third group – type “C+” (multi-fold animals) was characterized by an increased supply of skin, forming large densely located folds on the neck, barrel, sacrum, and thigh and at the root of the tail. The total number of folds on the body was on average 15-16, and on the neck 7-8. Meat qualities of animals were studied by slaughtering animals at 9 and 18 months of age by five heads from each experimental group. The slaughtering of animals was carried out on a slaughtering ground. The slaughtering preparation and the slaughtering itself were carried out according to the method of agricultural sciences. It was established that the main indicator of meat productivity, slaughtering yield, exceeded that of peers in castrated sheep of the nonfolded type. So, the slaughtering yield in 9-month-old rolls type “C” at 2.37 and type “+” – 5.37% was lower than coevals without folds. At the age of 18 months, this indicator was lower in individuals of types “C” and “C+” than in “C-” by 1.58 and 2.75%, respectively.
Key words : Skin folding, meat productivity, slaughter, weight, morphological, carcasses, pulp