Results of determination of yielding capacity, chemical composition of initial weight and silage quality of forages prepared from the binary mixtures of Japanese millet (Panicum curs-galli var. frumentaceum), millet (Panicum) and saccharine sorghum (Sorghum saccharatum) realized in the conditions of the Republic of Belarus were presented. Research results showed that the binary mixture of saccharine sorghum with blue lupine (Lupinus angustifolius) in ratio of 70% + 30%, respectively made it possible to obtain the highest efficiency (62,4 t/ha of green material, 15,1 t/ha of dry matter, 13,1 t/ha of fodder units). Mixed sowing of millet, Japanese millet and saccharine sorghum with blue lupine surpassed in productivity the single-crop sowing on 15,5-32,6%. It was established, that the silage produced from the mixture of sorghum and Japanese millet with lupine had higher energy and protein nutritive value: 0,86 and 0,98 fodder unit, respectively; 9,77 and 9,92 mJ of exchange energy per 1 kg of dry matter, respectively; 103, 3 and 108,4 grams of digestible protein per 1 fodder unit. High nutritive value and the best palatability of trial silos promoted the increasing of milk yield on 4,4-5,4% in comparison with the control tests. Haylage which was produced from drought resistant crops had high energy nutritive value: per 1 kg of dry matter there was noted 9,40-9,48 mJ of available energy, 0,89-0,94 fodder units with fodder unit provision with 102-114 grams of digestible protein

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

Nowadays in connection with an interdiction for antibiotics use in animal feeding it is very actual to work out and apply new forms of probiotic preparations which should be as ecologically safe and harmless both to people and animal products. Probiotics make it possible to improve the digestibility of nutritive substances of forages, normalize metabolism, enrich with biologically active substances that promotes the increasing of their productivity. In the Republic of Belarus the probiotics are produced in the obviously insufficient quantity that creates problems of young stock livability. Influence of application of Akozil and Sublicin probiotics in diets of suckling calves on biochemical parameters of blood serum was analysed. It was stated that use of the analysed probiotics made it possible to decrease the level of urea and total cholesterol, to increase of the total protein content in blood serum of the experimental calves. There was noted the increasing of glucose level in blood serum of calves fed with Akozil. There was marked the tendency of more optimal level of calcium and phosphorus in calves having Sublicin in their diets. The obtained results testified the normalization of metabolic processes taking place in calves which were fed by the mentioned above probiotics

The level of yielding and biological capacity of grass mixtures of feeding crops (common ryegrass (Lolium perenne); spring vetch (Vicia); Austrian winter pea (Pisum arvense); blue lupine (Lupinus angustifolius); common barley (Hordeum vulgare)) in the conditions of the Northern part of the Republic of Belarus and their quality evaluation were studied. The optimum temperature of seed germination at the seeding depth and the sufficient amount of moisture in soil provided high germination rate. Nitric fertilizer application and crop sowing in the conditions of various coenosis did not affect seed germination. The quantity of shoots predetermined the optimum plant stand density and made it possible to generate high green mass productivity. Formation of a high green mass yield in single-crops sowings of annual ryegrass was obtained against the background of minimum 180 kg of primary nutrients of nitric fertilizers per 1 ha, taking into consideration that the amount of crop tops increases in 3 times in comparison with crops without nitric fertilizers. Inclusion bean component into the grass mixture (even without nitrogen application) made it possible to generate the level of top biomass by three hay crops from 40,2 up to 55,4 t/ha. However, application of mineral nitrogen for cultivation of leguminous and cereal crop mixtures with overgrassing of annual ryegrass made it possible to increase the green mass productivity. Inclusion of a bean component into a grass mixture rendered influence on the amount of digestible protein. The highest protein yield was provided by high yielding crops with content of spring vetch on the background of mineral nitrogen (0,9 t/ha). In coenosis with pea and lupine mixtures provided protein content of 0,8 t/ha

In the conditions of application of enzyme preparations there is the possibility of inclusion into mixed fodders structure of such cheap fodder grains as rye. Determination of the optimal dose of introduction of the liquid enzymatic fodder additive (xylanase – 8800 units; phytase – 600 units; cellulose – 880 units; r-gluco – 4000 units; a- amylase – 200 units) and its influence on stores productivity during the completion of growing and fattening periods was realized in the conditions of the Republic of Belarus. Research results showed the following: inclusion into mixed fodders of the increased amount of rye grain (without the enzyme additive) for stores feeding during the completion of growing (20%) and fattening (30%) periods did not render negative influence on experimental animals; the optimal dose of the trial enzyme for stores during the completion of growing period - (SK-21 including rye grain - 20%) was 200 ml per 1 t of mixed fodders; the optimal dose of the trial enzyme for stores during the fattening period (KDS-26 including rye -30%) was 150 ml per 1 t of mixed fodders. Application of the experimental fodder additive promoted the increasing live weight gain. There was noted the tendency of the positive influence of the analyzed enzyme on dry and organic matter, fat, dietary fibre and nitrogen-free extractive substances digestibility

The purpose of research is to study influence of fodder additive Water Trit liquid on dynamics of live weight, natural resistance and determination of an optimal dose for pigs on growing. Thanks to рН decrease of intestines contents and presence of organic acids the additive is applied for disease prevention. Presence of organic acids stimulates the development of useful Lactobacillus micro flora in intestines gleam. From the received data positive influence of the fodder additive on a gain of body weight is visible. In the beginning of experiment the difference in body weight of a control and a trial groups was insignificant and made from 9,2 kg to 9,4 kg in the experimental group, and 9,3 kg - in the control group. In the end of experiment the difference in body weight was essential: 28,6 kg, 30,5 kg, 29,5 kg in the trial groups and 28,05 kg in the control. After application of the fodder additive Water Trit liquid in the trial groups there were noted the raised daily average weight gains: on 2,6% in the second, on 13,4% (P less than 0,05) - in the third and on 8,5% - in the fourth group in relation to control group. For studying of the influence of the fodder additive on animal organism there was carried out the blood testing: phagocytosis, bactericidal activity of blood serum, lysozyme activity of blood serum. Indexes on phagocytal index at animal of the control and trial groups were in the beginning of experiment approximately at one level. At 45-day age the indexes in the second and fourth trial groups were above the control ones on 5,2% and 8,9%, respectively. By the end of the experiment the phagocytal index in all four groups changed insignificantly. At studying of lysozyme activity of blood serum at pigs the given research have shown, that at 30-day age the indexes in the third and fourth trial groups were above the control, and indexes in the first group were above the standard of the control. At 70-day age the highest lysozyme activity of blood serum was in the second trial group and has made +16,0% to the control. It is necessary to notice, that on the 70th day this indicator was above the control in all three trial groups

Research on preserving ability of the biological preserving agent Bioplant for grass and maize silage making was realized in the conditions of the Republic of Belarus. Application of Bioplant in course of grasess and maize encilaging promoted the faster accumulation of the significant amount of milk acid and decreasing of рН up to 4,1-4,2. Silage which was prepared with preserving agent Bioplant corresponded to the top grade of quality. Application of Bioplant for preparation of siloed forages promoted the reduction of losses at their storage. For example, in grass-legume and cereal silage there was a reduction of dry matter losses in comparison with control silage - on 4,7 and 4,2%, crude protein - on 5,6 and 5,0%, respectively. In maize silage the addition of the preserving agent there was stated the decreasing of nutrient losses in comparison with the control: dry matter - on 5,2%, crude protein - on 6,2%. Feeding of wedder hogs with the silage preserved by the preserving agent Bioplant provided higher digestibility of crude protein in comparison with the control group: on 3,2% in the conditions of grass-legume silage use, on 2,4% - in the conditions of feeding with cereals, and on 2,9% - in the conditions of feeding with maize silage

Studying of influence of various levels of selenium on growth, protein structure of blood serum, natural resistance, and reproductive performance of pedigree bull-calves was realized in the conditions of the Republic of Belarus. It was established, that feeding with an optimum dose of selenium (0,4 mg per 1 kg of dry matter) in rations of replacement bull-calves during the raising period promoted the increasing of daily average weight gain on 6,8%, indexes of natural resistance - on 0,5-13,9%, and sperm production quality - on 4,5-27,3%. In the conditions of optimization of selenium level of in diets the protein structure of blood serum of replacement bull-calves exceeded the similar index at control animals by the crude protein index - on 8,3 (Р less than 0,05), by albumine and alpha globulin -on 2,2% and 1,6%, respectively. Application of selenium in dose of 0,4 mg per 1 kg of dry matter made it possible to increase the indexes of natural resistance on 0,5-13,9%. Increase of selenium dose up to 0,4 mg per 1 kg of dry matter in made it possible to increase the quantity and quality of sperm of bull-calves, that was proved by the increasing of ejaculate volume on 4,5%, concentration of male germ cells in ejaculate – on 15,7% (Р less than 0,05) and male germ cells activity - on 7,3% (Р less than 0,001)

Among bacterial infections of fur animals in beast breeding farm in Belarus pasteurellosis takes a leading place - 42,06%. Pasteurellosis of fur animals is characterized by the expressed seasonal prevalence. The greatest percent of Pasteurella allocation is registered during the autumn and spring periods. The maximum allocation is noted in October and March accordingly 18,55% and 13,21%. Infection rate with pasteurellosis depends on age of fur animals. The most susceptible is the young growth at the age from 2 till 5 months. Pasteurellosis of fur animals is most often clinically shown by symptoms of defeat of respiratory organs and has subacute and chronic current. Pathoanatomical changes at fur animals at pasteurellosis have expressed tropism to respiratory system with formation of characteristic changes without dependence from a disease current; at acute process the picture of hemorrhagic diathesis is added, at a chronic current are observed necrotic changes in a number of tissues. | Среди бактериальных инфекций пушных зверей в звероводческих хозяйствах Республики Беларусь пастереллез занимает ведущее место - 42,06%. Пастереллез пушных зверей характеризуется выраженной сезонностью. Наибольший процент выделения пастерелл регистрируется в осенний и весенний периоды. Максимальное выделение отмечено в октябре и марте соответственно 18,55% и 13,21%. Уровень заболеваемости пастереллезом зависит от возраста пушных зверей. Наиболее восприимчивым является молодняк в возрасте от 2 до 5 месяцев. У пушных зверей пастереллез наиболее часто клинически проявляется симптомами поражения органов дыхания и имеет подострое и хроническое течение. Патологоанатомические изменения у пушных зверей при пастереллезе имеют выраженный тропизм к дыхательной системе с формированием характерных изменений вне зависимости от течения заболевания; при остром процессе добавляется картина гемораггического диатеза, при хроническом течении наблюдаются некротические изменения в ряде тканей.

For increase of efficiency and natural resistance, decrease in the cost price and increase of poultry efficiency the big attention is given to questions of bird mineral food. Now for balancing of bird rations on mineral substances, especially on calcium, the poultry-farming enterprises apply an expensive cockleshell which is delivered from Azov. During too time in our country there are enough of local sources of the mineral raw materials which use in bird feeding can be effective enough. Dolomite in the form of flour which stocks are great enough can serve one of sources of bird mineral food. As a result of the spent research it is established, that use of the local mineral additive dolomite in feeding of hens-layers probably as a substitute of an expensive import cockleshell. For an optimum dose it is possible to accept 3% of dolomite from forage mass. At use of the given dose the best results of egg efficiency, livestock safety and the expense of forages have been received. | Для повышения продуктивности и естественной резистентности, снижения себестоимости и повышения эффективности отрасли в целом большое внимание уделяется вопросам минерального питания птицы. В настоящее время для балансирования рационов птицы по минеральным веществам, особенно по кальцию, птицеводческие предприятия применяют дорогостоящую ракушку, завозимую с Азовского моря. В тоже время в нашей стране имеются достаточные количества местных источников минерального сырья, использование которых в кормлении птицы может быть достаточно эффективным. Одним из источников минерального питания птицы может служить доломит в виде муки, запасы которого достаточно велики. В результате проведенных исследований установлено, что использование местной минеральной добавки доломита в кормлении кур-несушек возможно в качестве заменителя дорогостоящей импортной ракушки. За оптимальную дозу можно принять 3% доломита от массы корма. При использовании данной дозы были получены лучшие результаты яичной продуктивности, сохранности поголовья и расхода кормов.