Data on studying of efficiency of application of immunobiological preparations on efficiency and other clinical and biochemical indicators for chickens-broilers are cited. It is established, that their application to chickens-broilers promotes increase of biological value of fowl as foodstuff and is economically expedient. Application of a preparation the Biococktail-NK in an optimum dose 0,1 - 0,2 ml/goal (10,0-20,0 million microbic bodies) has allowed to increase intensity of growth of chickens-broilers by 3,5%, to lower forage expenses for production of a gain of body weight of 1 kg on 4,95%, to raise safety of young growth of birds on 3,4 % and to lower a case of birds to 1,6% (technological norm of 5%). The carried out calculations have shown, that introduction of the Biococktail-NK in a ration of broilers is economically justified, as safety of young growth in 4th trial group has raised on 3,4%, in the third - on 2,5%, in the second - on 1,3%. On the basis of the spent research fowl of the delivered samples in which ration it was entered the probiotic Biococktail-NK from calculation 0,1 - 0,2 ml/goal (10,0-20,0 million microbic bodies) since daily age within the first 5 days into 4 cycles with an interval of 7 days till the end of the cultivation period is established, that on organoleptic, physical and chemical, bacteriological indicators, and also biological value and harmlessness does not concede to meat of control group and is good-quality. In the literature there are data about influence of biologically active substances on growth and development of bird. Despite it, about influence of probiotical and immunostimulatory preparations as separately, and in a complex with probiotics, on an organism of chickens-broilers it is not enough data that induces carrying out of scientific research in the given direction. Simultaneous use of probiotics on the basis of an intestinal stick in rations of chickens-broilers is the perspective directions. Proceeding from it, working out of new effective ways of increase of chickens-broilers efficiency with a view of reception of ecologically pure and safe products of poultry farming is actual for poultry-farming economy of Belarus.

Research of the influence of biologically active preparations of natural origin on zoological indices and quality of animal products was studied by the example of their application in broiler chicken diets in the conditions of the Republic of Belarus. On the basis of realized research it was established, that application of biologically active substances immunoamplifier Alveozan, probiotic Dialakt, probiotic Bifidoflorin liquid, prebiotic Biofon and prebiotic Biofon AIL (produced in the Republic of Belarus) did not render negative effect on quality of animal products (all studied meat samples had high quality). The received results testify to necessity of complex application of the above-stated preparations. Application of biologically active preparations made it possible to increase livability of growing birds on 100%, average live weight increase from 1,9 up to 5,1%, daily average weight gain - from 1,9 up to 5,1%, improvement of feed conversion ratio - from 18,3 up to 21%. All studied biologically active preparations made it possible to restore the physiological environment in poultry intestines, normal flora, to suppress the growth of pathogenic microorganisms. The above mentioned preparations could be applied both with preventive, and with the medical purposes

There was studied the influence of type Tf on indicators of iron transport fund of clinically healthy chickens-broilers of 46 day age; to establish a phenotype of chickens on transferrin type, the content of common iron in blood serum, common GILA, calculate indicators of the sated GILA and degrees of iron saturation. The received results lead to a conclusion: indicators of the content of common iron in serum at chickens with types Tf АВ, ВС and СD have doubtful distinctions, group of chickens with type Tf AC authentically (р0,05) is less on 1,36 mkmol/l or 8,05% in comparison with group of chickens containing type Tf AB. Values of the common GILA considerably differ at chickens-broilers between types Tf AB and Tf CD, AC and ВС. As common GILA is defined mainly by concentration of transferrin in blood serum, its values at chickens-broilers with different types can be regarded as different concentration transferrin in blood serum at these chickens. As transferrin possesses protective properties, it is possible to assume, that chickens with transferrin Tf CD type will possess the big immunity in comparison with chickens at which types Tf BC and Tf AB are established. At the same time slightly differing values of degree of iron saturation at chickens-broilers with different types of transferrin give the bases to consider, that different types of transferrin possess approximately identical GILA. | Целью работы явилось изучение влияния типа Tf на показатели транспортного фонда железа клинически здоровых цыплят - бройлеров 46 дневного возраста; установить фенотип цыплят по типу трансферрина, содержанию общего железа в сыворотке крови, общей железосвязывающей способности, рассчитать показатели насыщенной железосвязывающей способности и степени насыщения железа. Полученные результаты приводят к выводу: показатели содержания общего железа в сыворотке у цыплят с типами Tf АВ, ВС и СД имеют недостоверные различия, группа цыплят с типом Tf АС достоверно (р0,05) меньше на 1,36 мкмоль/л или 8,05% по сравнению с группой цыплят содержащих тип Tf АВ. Значения общей железосвязывающей способности значительно различаются у цыплят-бройлеров между типами Tf АВ и Tf CD, АС и ВС. Поскольку общая железосвязывающая способность определяется, главным образом, концентрацией трансферрина в сыворотке крови, то ее значения у цыплят-бройлеров с разными типами можно расценивать как разную концентрацию трансферрина в сыворотке крови у этих цыплят. Так как трансферрин обладает защитными свойствами, то можно предполагать, что цыплята с типом трансферрина Tf СД будут обладать большим иммунитетом по сравнению с цыплятами у которых установлены типы Tf ВС и Tf АВ. В то же время незначительно отличающиеся значения степени насыщения железа у цыплят-бройлеров с разными типами трансферрина дают основания считать, что разные типы трансферрина обладают примерно одинаковой железосвязывающей способностью.

The influence of various light regimes on productive indices of broiler chickens cultivation of СОВВ cross taking into consideration the course of some exchange processes was studied in the conditions of the Republic of Belarus. There were formed 4 groups of one-day-old chickens with the approximately identical body weight. For the chickens of a control group there was used the standard for Belarusian poultry farms light regime, i.e. 23 hours of light and 1 hour of darkness (23L:1D), in three experimental groups there were used the following light regimes: first - (3L:1D) х 6, second - (2L:1D) х 8, third - (1L:1D) х 12. The predetermined conditions were set by means of filament lamps with 15 W capacity. Throughout the whole experiment there was realized the identical feeding level for all groups: during the first growing period (1-30 days) chickens were fed with mixed fodder PK 5B containing 22% of crude protein and 296,6 kcal of exchange energy, during second period (31-42 days) - PC 6B containing 20% of crude protein and 332,2 kcal. In the applied mixed fodders there was used enzyme Rovabio. Research results showed that metabolic processes occurring in chicken body in the majority opf cases depended on application of various light regimes. Interchange of light and darkness periods (3 hours of light and 1 hour of darkness) х 6 at light exposure in 15 lk rendered the positive effect on the activity of endocrine systems of chickens of СОВВ crosses. In mentioned above group of chickens the hormones directed their metabolic processes towards increasing the productive indices, namely: daily average gain of chickens of the first group was authentically higher than the same index in the second and the third groups on 13,6% and 17,9%, respectively

Development of diarrheal diseases of newborn animals has a miltifactorial character and it is very difficult to optimize the structure of microbial population in alimentary tract and to carry out the correction of the microbe status only by means medical preparations. Therefore, for regulation of standard structure of intestine microflora in a complex of medical and preventive measures for diarrhea diseases of young poultry an important role is played by application of probiotics, prebiotics, and immunoamplifiers. In course of study there were used biologically active preparations produced on the basis of ecologically pure products of a natural origin: immunostimulant Alveozan, probiotics Bifidoflorin liquid and Dialakt, and prebiotics Biofon АIL and Biofon. Research was realized on one-day-old broiler chickens of Kobb-500 cross. The obtained data on the positive influence of the studied preparations on microbiocenosis of an alimentary tract of broilers chickens correlated with the indexes of natural resistance (autarcesis).The analyzed preparations made it possible to increase the local protection, stimulation of hematopoiesis (increasing of hematoglobulin, erythrocytes and leukocytes); to increase the blood content of whole protein, albumens and globulins, bactericidal activity of blood serum. Complex introduction of the analysed preparations stimulated the natural disease resistance factors, normalized the metabolic function of poultry, promoted the increasing of chicken livability and productivity

Research on studying of probiotics and prebiotics influence on natural resistance, hemogenesis, metabolism, growth, development and safety are spent on chickens of 1-37-day age in the conditions of clinic of the department of internal noncontagious diseases and the central resarch laboratory of research institute of applied veterinary medicine and biotechnology Vitebsk State Academy of Veterinary Medicine. It was established that the combined use of probiotics and prebiotics increases the defense, raises safety rate and stimulates body weight gain in broiler chickens. Hence, probiotics and prebiotics at joint application render expressed growth-promoting effect, promote high safety of young growth, disease decrease, increase in a weight gain, raise indicators of the general and local protection, stimulate hemogenesis and exchange processes during the most intense periods of bird cultivation. At separate application of probiotics and prebiotics these indicators were a little lower, but authentically above, than at chickens of control group | Исследования по изучению влияния пробиотиков и пребиотиков на естественную резистентность, гемопоэз, обмен веществ, рост, развитие и сохранность, проведены на цыплятах 1-37-дневного возраста в условиях клиники кафедры внутренних незаразных болезней и центральной научно-исследовательской лаборатории Научно-исследовательского института прикладной ветеринарной медицины и биотехнологии УО ВГАВМ. Совместное применение пробиотика и пребиотика усиливает защиту, повышает сохранность и стимулирует прирост массы тела цыплят-бройлеров. Следовательно, про пробиотики и пребиотики при совместном применении оказывают выраженное ростостимулирующее действие, способствуют высокой сохранности молодняка, снижению заболеваемости, увеличению прироста массы, повышают показатели общей и местной защиты, стимулируют гемопоэз и обменные процессы в наиболее напряженные периоды выращивания птицы. При раздельном применении пробиотиков и пребиотиков эти показатели были несколько ниже, но достоверно выше, чем у цыплят контрольной группы

There was developed a method of increasing the efficiency of used feeds and poultry productivity by means of stimulations of natural resistance of an organism by biologically active substances (Vigozin preparation, containing carnitine). Application of preparation Vigozin with potable water twice in a dose of 1 ml on 1 l of water within first 3 days and for 13th day of cultivation allows to raise safety of chickens-broilers on 2,3% at the expense of normalization of metabolism at young growth and preservation of a functional condition of a liver. Results of the general clinical and the immunological analysis of blood at chickens-broilers of control and trial groups (M+/-m, n=10), biochemical indicators of blood at chickens-broilers of control and trial groups in age dynamics (M+/-m, n=10) are presented. | Целью работы являлось научное обоснование и разработка способа повышения эффективности использования кормов и продуктивности птицы путем стимуляции естественной резистентности организма биологически активными веществами (препарат Вигозин, содержащий карнитин). Применение препарата Вигозин с питьевой водой двукратно в дозе 1 мл на 1 л воды в течение первых 3-х суток и на 13-й день выращивания позволяет повысить сохранность цыплят-бройлеров на 2,3% за счет нормализации обмена веществ у молодняка и сохранения функционального состояния печени. Представлены результаты общего клинического и иммунологического анализа крови у цыплят-бройлеров контрольной и опытной групп (M+/-m, n=10), биохимические показатели крови у цыплят-бройлеров контрольной и опытной групп в возрастной динамике (M +/- m, n=10).

There was studied the prebiotic (Biofon AIL) and probiotic (Bifidoflorin liquid) preparations on a condition of bacterial flora of chickens-broiler intestines in age dynamics and also to estimate efficiency of joint application of prebiotics and probiotics. Biofon AIL represents mannan-oligosaccharides which are capable to block colonisation of intestines by pathogenic microflora and possess stimulating action on growth of bifidus bacteria in culture. Bifidoflorin liquid represents liquid microbic mass of bifidus bacteria. As a result of the spent research it is revealed, that inclusion of prebiotics Biofon AIL and probiotics Bifidoflorin liquid to a ration of chickens-broilers allows to spend correction of bacterial cenosis intestines towards prevalence of bifidus bacteria and lacto bacteria. Thus the best indicators are noted at sharing of these preparations. In the tabular form the data on dynamics bacterial cenosis intestines at chickens-broilers are presented at use of prebiotics and probiotics. | Целью работы явилось изучение пребиотического (Биофон АИЛ) и пробиотического (Бифидофлорин жидкий) препаратов на состояние бактериальной флоры кишечника цыплят-бройлеров в возрастной динамике, а также оценить эффективность совместного применения пребиотика и пробиотика. Биофон АИЛ представляет собой маннанолигосахариды, которые способны блокировать колонизацию кишечника патогенной микрофлорой и обладают стимулирующим действием на рост бифидобактерии в культуре. Бифидофлорин жидкий представляет собой жидкую микробную массу бифидобактерии. В результате проведенных исследований выявлено, что включение в рацион цыплят-бройлеров пребиотика Биофон АИЛ и пробиотика Бифидофлорин жидкий позволяет провести коррекцию бактериоценоза кишечника в сторону преобладания бифидобактерий и лактобактерии. При этом лучшие показатели отмечены при совместном использовании этих препаратов. В табличной форме представлены данные по динамике бактериоценоза кишечника у цыплят-бройлеров при использовании пребиотиков и пробиотиков.