In the conditions of the Republic of Belarus there was realized a scientific and economic experiment on studying the influence of a multi-enzyme feed additive on productivity, viability, growth and development of calves. The multi-enzyme additive contained in its formula xilanaza; glucanase; cellulose; and dolomite (as a filling agent). It was determined that young growth of cattle which were fed with the multi-enzyme additive in dose 1 gram per 6 kilogram of milk by the end of the experiment had a live weight gain on 13,6% higher than in a control group. Calves which were fed with the additive were characterized by more stretched constitution, had well developed thorax and good development of skeleton in comparison with analogues from the control group.

Development of axial skeleton bones of meat type broiler chickens of Kobb-500 and Ross-308 crosses at the postnatal ontogenesis period was investigated in the conditions of the Republic of Belarus. In course of studies there were used broilers of 5 age groups (1 day old, 20 days old, 30 days old and 40 days old) which were selected in accordance with analogous principle with 10 heads per each group. Research results showed that live weight gain as well as axial skeleton weight gain of both crosses chickens increased wavily. The highest growth intensity of body weight and axial skeleton weight was stated at broiler chickens of Kobb-500 cross at the last age period. The opposite way, there was noted the increasing of axial skeleton growth for broiler chickens of Ross-308 cross at the age of 20 days. At the further age periods till the end of fattening-off there was stated the slowing of axial skeleton and body weight. In the period of 1 to 10 days there was stated an intensive growth of cervical spine of spinal column of broiler chickens of both crosses. High intensity of absolute weight growth of cervical spine of spinal column for Kobb-500 cross chickens was stated at the age period 30-40 days; for Ross-308 cross chickens - at the age 10-20 days

Study of the regeneration processes and raising the efficiency of rape (Brassica napus) organs and tissues cultivation in vitro methods, as well as the achievement of a stable yield of proper regenerants were realized in the conditions of the Republic of Belarus. The obtained data specified the possibility of generation of rape finished regenerants in vitro culture without additional passages and transfers by means of effectively selected concentrations of phytohormones and biologically active substances, which made it possible to realize principles of totipotency and polarity of crop vegetative organs. On the explant part which was submerged into culture medium there was formed a root, and on opposite one - the morphogen structures. The possibility of obtaining rape regenerants from hypocotyls segments by straight regeneration was studied. Application of the analyzed substances considerably simplified and reduced the price of process of full regenerants formation, and made it possible to receive a wide spectrum of various forms that was important for selection process due to the opportunity to select valuable (in protein content) samples for the further studies and their inclusion into production process

Research of a pancreas of geese in course of different age-specific periods was realized in the conditions of the Republic of Belarus. Ecological features of water fowl inhabitance, prevalence of phytogenous forages in a diet of led in first two life decades to rapid growth of body weight and pancreas which was capable to adapt an organism to new conditions of existence. The subsequent growth and differentiating processes in a pancreas of geese showed direct correlative dependence on the basic physiological states of their organism (plumage, a moult, puberty, egg production efficiency). By the beginning of egg production (6 months) the basic structural components of secretory parts of gland of geese reached a rather developed condition, but their full morphological and functional maturity occurred by 2-year-old age, possibly, because of a long reproductive period of life. | Проведено исследование поджелудочной железы у гусей в разные возрастные периоды. Экологические особенности среды обитания водоплавающих птиц, преобладание в рационе кормов растительного происхождения приводят в первые две декады жизни к бурному росту массы тела животных и поджелудочной железы, способной адаптировать организм к новым условиям существования. Последующие ростовые и дифференцировочные процессы в поджелудочной железе гусей проявляют прямую коррелятивную зависимость от основных физиологических состояний их организма (оперение, линька, половое созревание, яйценосная продуктивность). К началу яйценоскости (6 месяцев) основные структурные компоненты секреторных отделов железы гусей достигают достаточно развитого состояния, но их полная морфофункциональная зрелость наступает к 2-летнему возрасту животных, вероятно, из-за продолжительного репродуктивного периода жизни.

There was studied the features of intra-bodies vessels of turkey thymus of white breed during postnatal ontogenesis. Results of the anatomic and histologic research which allowed to study law of transformations of intra-bodies vessels of turkey thymus are reflected. It is established, that age reorganisation of intra-bodies vessels of turkey thymus is interfaced to development of the basic structural body components. The microvascular thymus channel at the expense of presence hemato-thymus barrier accepts active participation in separation of blood and blood-groove regulation in parenchyma. The maximum factor of thymus blood supply of turkeys is noted in 70 days. Before puberty there is a growth of intra-bodies vessels at the expense of increase in their diameter and a thickness of a wall (mainly media), and after 220 days the haemodynamic potential of body decreases owing to increase of the involutional processes characterized by reduction of vesseldiameter and a thickening of their wall for the account of adventition. In the tabular form the sizes of intracapsular thymic vessels, the sizes of interlobular thymic vessels are presented. | Цель исследования - изучить особенности интраорганных сосудов тимуса индеек белой широкогрудой породы в постнатальном онтогенезе. Отражены результаты анатомических и гистологических исследований, позволивших изучить закономерности преобразований интраорганных артерий тимуса индеек белой породы в период постнатапьного онтогенеза. Установлено, что возрастная перестройка интраорганных артерий тимуса индеек сопряжена с развитием основных структурных компонентов органа. Микрососудистое русло тимуса за счет присутствия гематотимусного барьера принимает активное участие в сепарации крови и регуляции кровотока в паренхиме. Максимальный коэффициент кровоснабжения тимуса индеек отмечен в 70 суток. До полового созревания происходит рост интраоганных артерий за счет увеличения их диаметра и толщины стенки (преимущественно медии), а после 220 суток гемодинамический потенциал органа снижается вследствие нарастания инволюционных процессов, характеризующихся уменьшением диаметра артерий и утолщением их стенки за счет адвентиции. В табличной форме представлены размеры интракапсулярных артерий тимуса, размеры междольковых артерий тимуса.

There were studied the architectonics features of extra-bodies turkey thymic vessels during postnatal ontogenesis. Results of anatomic research of sources of blood supply turkey thymus during the period of postnatal ontogenesis are reflected. Thus, blood supply of turkey thymus is carried out from pair spinal trunk and its branches. The scheme of topographical architectonics of vessels remains on an extent of postnatal developments. Blood supply of the segments laying in a phrenic cavity, is carried out by the branches departing directly from spinal trunk, and the segments located in the field of a neck, from corresponding ascending to a cervical artery. For the vessels departing from a trunk in the phrenic cavity, and also for large vessels of a neck area, the greatest intensity of growth of diameter in the first month of a life is characteristic. With the years there is an increase in diameter of spinal trunk and an ascending cervical artery on 88,14% and 88,89% accordingly. Diameter of the branches going to the first segment, increases till 70 days (by 86,86%), the second and the third - till 110 days (on 82,00%), to large segments - till 220 days (on the average on 72,50%). Reduction of diameter of arteries, blood supplying of thymus segments, located in the field of a neck, after 110 days (on the average on 45,72%) is revealed. It specifies in decreasing of level of their thymus blood supply owing to increase of age involution processes. | Цель исследования - изучить особенности архитектоники экстраорганных артерий тимуса индеек белой широкогрудой породы в постнатальном онтогенезе. Отражены результаты анатомических исследований источников кровоснабжения тимуса индеек в период постнатального онтогенеза. Таким образом, кровоснабжение тимуса индеек осуществляется от парного соннопозвоночного ствола и его ветвей. Схема топографической архитектоники сосудов сохраняется на протяжении постнатального развития. Кровоснабжение долек, лежащих в грудобрюшной полости, осуществляется ветвями, отходящими непосредственно от соннопозвоночного ствола, а долек, расположенных в области шеи, от соответствующей восходящий шейной артерии. Для сосудов, отходящих от ствола в грудобрюшной полости, а также для крупных сосудов области шеи, характерна наибольшая интенсивность роста диаметра в первый месяц жизни. С возрастом происходит увеличение диаметра соннопозвоночного ствола и восходящей шейной артерии на 88,14% и 88,89% соответственно. Диаметр же ветвей, идущих к первой дольке, увеличивается до 70 суток (на 86,86%), второй и третьей - до 110 суток (на 82,00%), к крупным долькам - до 220 суток (в среднем на 72,50%). Выявлено уменьшение диаметра артерий, кровоснабжающих дольки тимуса, расположенные в области шеи, после 110 суток (в среднем на 45,72%). Это указывает на уменьшение уровня их кровоснабжения тимуса вследствие нарастания процессов возрастной инволюции.