The modern sheep breeding industry is predominantly based on the efficient meat and milk production. At the same time, the woolen productivity is one of the strategic components of a country's raw material security in the production of various products from it, where the Romanivska breed occupies an appropriate place. Results of research of indicators of woollen productivity of sheeps of Romanivska breed of different sex-age groups (adult ewes of 2-3 lambing times, ewe lambs and cowslip at birth, at 2-, 4-and 6 months of age) are given as a result of interaction of hereditary information and paratypical factors. The formation of physical and technical properties of sheep wool, age variability of its growth and development were studied depending on the season and technological use. Wool productivity has been evaluated by individual accounting for the wool shear of the entire test livestock up to 0.1 kg. During the shearing, the wool shear of the unwashed wool and the output of the washed fibre were determined. The natural length of the wool set with precision to 0.5 cm using a millimeter ruler; true length-on the device FM-0.4; the fineness of wool fibres-using the microscope «MP-3». A pronounced differentiation of the wool fibres by the fineness was established. The morphological composition of fleece wool can be a breeding trait closely related to the type of constitution of sheep, and directly affect the technological properties of wool raw materials. Thoroughbreed belonging of sheeps, age, sex, feeding and keeping of animals, selection and choice by level of woolliness have a significant influence on the formation of wool. The most intensive growth of wool in length occurs during the first two months of postnatal development of animals.

One of the most difficult problems to be solved by the agro-industrial complex in Ukraine is the increase in meat production, in particular beef, pork, chicken, lamb, not forgetting about improving its quality and reducing its cost. At the same time, one of the important indicators of the welfare of the population is the level of consumption of products of animal origin, especially meat. Today, in many countries of the world, including Ukraine, there is a sharp deficiency of animal

Sheepskin is a component of two important elements -leather fabric and wool. At all stages -from skinning to the production of semi-finished products, the main task is to preserve the sheepskin's natural qualities and the bond strength of wool with leather fabric. The aim of the research was to study the qualitative indicators of Romanov sheep's and crossbreed's sheepskin obtained by crossing Romanov sheep ewes with rams of Gissar breed. The effectiveness of crossbreeding in terms of sheepskin performance and its physical and technical properties was established. By the mass of sheepskin raw materials, crossbreed lambs were dominated over Romanov purebred peers by 10.9%. These differences were associated with different live weights of experimental young sheep. By the area of sheepskins, crossbreed young growth exceeded purebred peers by 9.8%. These sheepskins have a coarser coat and were characterized by the powerful development of the dermis pilar and reticular layers, which is associated with the breed characteristics of these structures. The dermis thickness in experimental sheep was in the range of 1.1-1.3 mm. Sheepskin of the Romanov breed sheep, due to its preserving and further processing, were reduced by 21.3%, which was 2.9% more compared to the experimental group. This feature is associated with the histological structure of dermal structures in experimental young animals. An indicator that characterizes the relative lightweight of the produced sheepskin is the mass of the semi-finished product (dm 2 ). According to these data, crossbreed young sheep were dominated over purebred peers by 25.6%, and it indicated their compliance with standards, according to current requirements in the fur industry. And according to the physical and technical properties, crossbreed sheepskin was dominated over pure-bred young sheep's in terms of raw materials and semi-finished products, and in terms of wool yield-to-launch ratio, by 2.6%. However, studies indicated that the sheepskin of experimental genotypes met the requirements for raw materials of existing processing industry standards.

Meat quality and slaughter indices of sheep depend primarily on breed peculiarities and are connected with age, fatness, sex, feeding and keeping conditions. According to the pre-slaughter mass, slaughter mass and mass of paired carcass, crossbred animals exceed their pure-bred counterparts. Experimental work was сonducted at Terra Rich LLC in the Pologivskyi district of Zaporizhia region. Tupping rams (Rom) and Hisar (H) were used on ewes of the Romanivska breed. Two groups of cowslip were formed: a control from purebred animals of the Romanivska breed (Rm × Rm) and experimental crossbreed with Hisar (Rm × H). Control slaughter of young rams was performed in accordance with the method of estimating the slaughtering performance (meet productivity) of sheep at 8 months of age. The morphological composition of the carcasses was determined by the results of the deboned half-carcass after 24-hour cooling to determine the dressing percentage of pulp, bones and fat. The chemical composition was determined in the average meat sample, in the longest muscle of the back (mus. longissimus dorsi) the amount of intramuscular fat was determined with the subsequent caloricity count of the meat. Crossbreed animals had higher indices of productivity than the pure-bred born in the same year of the Romanivska breed. The pre-slaughter live weight of crossbreed animals was greater by 29.2 %; slaughter weight – by39.7 %. Dressing percentage of the crossbreed animals was 47.4 %, and in pure-breds – 43.8 %. The crossbreed animals had absolute preference of varietal cuts: meat of the first сlass – 94.57 %, of the second – 5.43 %, in purebreds – 91.60 and 8.40 %, respectively. The preference for purebred Romanivska sheep on the caloricity of the muscle tissue was 8.7 %. In carcasses of crossbreed young animals, the relative mass of muscle tissue was 78.8 %, bones – 21.2%, versus 73.3% and 26.7 %, respectively, in purebred counterparts. The pulpiness ratio for crossbreed young rams was 3.7 and for purebred young rams was only 2.7. The positive effect of crossbreeding on the meat productivity of young animals has been established. Crossing the ewes of the Romanivska breed with the tupping rams of the Hisar breed can be successfully used in commercial sheep raisings.

Організація збалансованої годівлі, що задовольняє потреби плідників в поживних речовинах і вітамінах, за певного фізіологічного стану і рівня продуктивності - один з головних чинників процесу забезпечення повноцінного сперматогенезу та якісних показників сперми. У зв'язку з тим, що з багатьох причин спостерігається дефіцит білку в кормових раціонах (ціноутворення, якість кормових засобів, конкуренція), то забезпечення достатньої кількості протеїну в ньому є однією з головних умов отримання якісної спермопродукції. Наведено результати досліджень впливу кормової добавки «Бефіто» органічного походження на відтворювальну здатність і якість спермопродукції баранів-плідників породи овець - придніпровська м’ясна. Встановлено, що використання кормової добавки «Бефіто» в раціонах забезпечує покращення процесу сперматогенезу та впливає на підвищення кількісних і поліпшення якісних показників спермопродукції. Рівень часу на отримання одного еякуляту у плідників 9,1-10,8 с, що вказує на їх високу статеву активність та потенцію. Об’єм отриманого еякуляту баранів дослідної групи на 11,7 %, активність сперміїв на 3,7 %, концентрація сперміїв в еякуляті на 13,9 % більше в порівнянні з однолітками контрольної. Перевага плідників дослідної групи спостерігається за загальною кількістю сперміїв в еякулятіі становить + 27,3 %. При цьому не спостерігається тератогенності статевих клітин. Рівень патологічних спермальних форм в еякулятах в межах фізіологічної норми (< 14 %). Враховуючи середній об’єм еякуляту від баранів-плідників дослідної групи, було отримано15,8 спермодоз в розрахунку на 1 голову проти 14,2 в контролі, що на 11,3 % більше. Отримані результати дозволяють вважати доцільним застосування кормової добавки «Бефіто» для поліпшення процесу сперматогенезу та якості сперми і рекомендувати як найбільш ефективної