POSTNATAL ONTOGENESIS OF THE RENAL TUBULES OF THE KIDNEY IN THE CHICK CROSS "SIBERIAN-2"
Currently industrial poultry has a high level of mechanization and intra-division of labor, in connection with which increases the intensity of the use of poultry. At the cellular content of the bird is being increased inactivity. This leads to changes in the structures of the body at different levels. Use in breast feed mixtures, different in its composition, is also a key point in the final product of better quality. Deep knowledge of physiological functions birds allow maximum use of its resources. Currently, the country's poultry farms use 2 or 3-phase feeding of broiler chickens. In the first case using diets for chickens up to 4 weeks and over 4 weeks of age, in the second case - for broiler chickens at the age of 1-3, 4-5 and 6-7 weeks. The composition of feed includes a variety of useful items such as wheat, peas, barley, corn, and many other micro and macro elements. Foodmixture positive effect on the formation of the skeleton of chickens, chicks muscles increases, and a positive effect on the gastrointestinal tract. Given the growth and development of poultry production can reduce costs and improve product quality, having considered the scheme of feeding. Visual changes in the structure of the study show the histological techniques such as hematoxylin and eosin; Van Gieson; Mallory and others. Studies on the morphological and histological structure of the kidneys of birds are few and concise in their content. We have studied the histological changes in postnatal ontogenesis in chickens cross «Siberian -2» from day to ninety-day-old, in the physiological norm, and industrial environments. The paper presents photomicrographs, made on the microscope Austria xs-910, confirms the changes in the structures of authority.