Biological Properties And Breeding Of Meat And Wool Sheep

Аннотация

The article deals with the timing of reproduction, methods of reproduction, productivity, growth and development of offspring, biological, tribal features of meat and wool sheep in Uzbekistan. In order to increase the competitiveness of sheep breeding in Uzbekistan, using the best global gene pool, a new breed group of sheep with meat and wool productivity (Uzbek meat and wool sheep) has been bred. The introduction of meat and wool sheep into the practice of artificial insemination by frozen sheep seeds characteristic of the world sheep gene pool showed that the live weight of lambs taken from them, compared with the live weight of lambs obtained from natural insemination, was higher- 0.4 kg (9.3%), at 10-day-0.5 kg (6.8%) and 3-month-old age-0.4 kg (1.3%). KEYWORDS Artificial insemination, breeds, cultivation, lambs, live weight, meat and wool sheep, sheep, wool. INTRODUCTION of the external environment. Therefore, to fully realize the genetic potential of sheep, The biological properties of sheep are a set of feeding and care factors must be normal. One morphophysiological properties that of the main features of sheep is that they have determine the characteristics of productivity high flexibility and high ductility to various and the influence of the body on the reaction conditions. As a result of good flexibility and The US A Journals Volume 02 Issue 09-2020 71 The American Journal of Agriculture and Boimedical Engineering IMPACT FACTOR (ISSN – 2689-1018) 2020: 5. 34 Published: September 27, 2020 | Pages: 71-76 Doi: https://doi.org/10.37547/tajabe/Volume02Issue09-12 high plasticity of sheep, it became possible to pastures well but are also hardy to the create many species in various environmental qualities of pastures, of which different plants conditions in the desert, mountainous and are animals that produce a bitter, strong lowland areas. Sheep are animals that are very smell, spiny plants, many of which can freely well adapted to the conditions of pastures. Of eat alien plants.[2-5] These features of sheep the more than 800 plant species that animals have very great practical value, mainly due to feed on in the world, sheep consume 520, the use of areas unsuitable for crops or unable cattle-460, horses-416 plant species. The to feed other types of agricultural animals. current tasks are the preservation and The use of methods of keeping sheep in reproduction of the gene pool of these sheep pasture conditions further increases the by breeding fast-growing breeds of economic efficiency of the economy, if the competitive sheep that meet modern market conditions on pasture are sufficient, then even requirements, creating productive breeding in winter it will be possible to feed on pasture, studs of fast-growing meat and wool sheep which will save the feed. The fertility of sheep created in our country, creating breeding increases and health improves. Most meat and herds of highly productive sheep for meat wool sheep consume fat in their bodies in productivity, improving the selection extreme (unfavourable) conditions when characteristics for the productivity of the there are interruptions in nutrition and generations withdrawn from them. Work on watering. In conditions where nutrients are the creation of breeding groups of meat and good, they accumulate in the fat body. These wool sheep of Uzbekistan began in the valuable biological properties of sheep second half of the last century, that is, from contribute to the fact that they come out of 1953-1954, and was carried out by scientists of difficult conditions even during winter the Animal Husbandry Research Institute. One pastures when snow falls [7]. of the sheep breeds well adapted for breeding The use of artificial insemination in sheep and breeding in the mountainous and foothill farming significantly increases the chances of regions of the republic is meat and wool using high-value hereditary opportunities. sheep, which differs from other sheep breeds Artificial insemination of sheep compared to in that they are well adapted to environmental the natural method of insemination makes it conditions (rainy, snow and wet cold). Sheep possible to fertilize more than a hundred of this breed has high hereditary properties in sheep from the seed of hereditary sheep in terms of their productivity in conditions of one season of insemination. With artificial good pasture environment [1]. insemination, one hereditary ram accounts for The biological features of meat and wool a norm of 500-700 ram heads. Artificial sheep depend not only on their physiology but insemination is also possible in one season also on their anatomical features: they feed on with seeds of 5-6 thousand sheep, with seeds plants, dry stems, weeds, which are of famous sheep breeds, which have high characterized by the proportionality of the breed value. With natural fertilization, it will surface of the head, the hardness of the teeth be possible to fertilize 40-50 sheep heads with and the