THE INFLUENCE OF THE LEVEL OF FEEDING OF THE TUSHINSKY BREED SUYAGNY QUEENS ON THE MORPHOLOGICAL PARAMETERS OF THE SKIN OF THE OFFSPRING AT BIRTH

Abstract

Feeding during the suyagny period is crucial in obtaining strong and healthy offspring. In 2018-2020, in the peasant farm "Dzhigkaev Valery Sergeevich" of the Ardon district of the Republic of North Ossetia-Alania, the influence of the feeding level of suyag queens on the morphological indicators of offspring was studied. For the experiment, after the end of the breeding company, 120 queens of the Tushinsky breed were selected, going to the third lambing, which were divided into 4 groups of 30 heads each. The sheep of the control group received a household ration compiled in accordance with the norms of the VIZ. The diet of sheep of the second, third and fourth groups was increased in total nutrition by 10, 15 and 20%, respectively, compared with the diet of the control group. During lambing, five heads of sheep and young sheep were selected, in which morphological parameters of the skin were studied, according to preparations made from lambs ' skin samples taken from 5 heads from each group. It was found that as a result of the increased level of feeding of queens during the dry period, there was an increase in the thickness of the skin and its layers, the depth of the hair follicles, the diameter of the bundles of collagen fibers. The different level of feeding of the queens during the suyag period did not affect the number of hair follicles laid in the skin of newborn lambs. At the same time, the number of formed wool fibers of newborn lambs depends on the level of feeding of their mothers during the fruiting period. The greatest number of rudimentary follicles in the hair or on the unit area of skin (43,1 – 44,2%) had lambs received from Queens, who was in the business environment of feeding level, the lowest – in lambs whose mothers received by 15 and 20% more nutrients in the diet that is high feeding level (28,9 – 34,2%).