Feeding replacement heifers of 6-12 months of age with mixed feed that contains 20-25% of rape and lupine grain within winter and summer diets instead of sunflower cake allows to obtain the average daily weight gain of 893-927 g at forage spends of 6,0-6,3 с of forage units. The cost of these mixed feeds is decreased at 14% and prime cost of 1 c of weigh gain-at 6-15%

There are the results of the scientific and economic experiment by the study of multifermentable supplement eniciencyin calves nutrition, it has been established that young animals with the supplementary ration by the and of the experiment have maintained the live weight on 11.4% higher compared with the control group of animals. The rate of natural phylactic power of an organism in young animals with the supplementary ration was considerably higher

Increase of protein and energy nutrition norm of dry cows in winter and summer periods at 10 and 15% by protein and vitamin mineral additive based on peas and rape promotes increase of average daily weigh gain at 5,4-12,2%, calves live weight at birth – at 3,6-8,1%, average daily weigh gain – at 3,9 and 12,1%. Optimization of energy and protein content in diets allows to increase milk yield at 5,1-9,9% and decrease forage spends per 1 unit of product at 4,6-9,1%

In article influence of the complex vitamin-mineral additive on natural resistance, energy of growth of newborn calves, and also definition of its optimum dose is considered. Results of dynamic changes of alive mass, hematological and biochemical indicators are resulted. As a result of the spent researches use of the complex vitamin-mineral additive in a dose 10 g on a head is offered

Research results on usage of DNA-markers (RYRI, FABP, ESRF18/FUTI) and other factors for industrial pork production were presented. It was determined that DNA-technologies let conduct interbreed crossing on industrial scale and get diverse (fat or meat, with different fat content) products, as well as increase pork production in general. The best variants of crossing combinations were pigs of the Belarus large white breed with Belarus meat and Dyurok, and also the Belarus large white breed with Landras and Dyurok. Research results showed, for in course of the whole period of breeding the daily average weight gain of hybrids of the large white with the Belarus meat and breeds Landras was higher than with the Estonian bacon on 25 and 18 g, respectively. Fattening of stores was finished at the period of achievement of body weight by 100-102,5 kg. The slaughter yield of meat products by groups (without intestinal fat) did not essentially differ and varied within 69,9 - 71,1%. There were noted no considerable distinctions in weight of internals (heart, lungs, kidneys, spleen, liver). Thickness of the salted pork fat at hybrids with animals of the Belarus meat breed was 1-2 mm lower than in other. The average meat yield of diverting weir was 61,9%, fat weight - 27,9%, bone weight - 10,2%. The organoleptic evaluation of beef-infusion broth quality showed that indicators of habit, aroma and taste and nourishing were at high level and compose 4,67; 4,59; 4,55 and 4,71 points, respectively. Tenderness, juiciness and taste of boiled meat also were at level 4,69; 4,76 and 4,87 points, respectively; fried meat - 4,57; 4,68 and 4,66 points

In the conditions of market relations formation the lowering of production prime cost at the JSC Sennitsa Plant SOM gained the special importance. The reserve supplies for increasing of economic efficiency of milk processing and dairy products production in the conditions of the Republic of Belarus were analyzed. A subject of activity of the enterprise is milk processing, development of dairy production and its realization. Economic benefit of realization of the offered actions is shown. Transfer to the local sources of fuel (woodfuel) made it possible to reduce considerably the cost price of production at the analysed plant. By means of lowering the current consumption of electric energy the economy of the cost price due to decrease expenses for the electric power will make 0,27%. The general economic benefit will consist in decrease in the cost price of a commodity output on on 2,71%, increase of production profitability on 3,55 items. Thus, the realization of the offered actions will considerably improve the financial indicators of JSC Sennitsa Plant SOM

Research and production experiment on studying the efficiency of calve growing depending on the methods of their husbandry at the prophylactic and lactic periods was realized in the conditions of the Republic of Belarus. It was established, that calves which were kept in course of the analyzed periods in group cages of a calf-house at the age of 180 days had live weight on 9 kg (or on 5,4%) higher than cattle kept in course of the prophylactic period in individual cages of a prophylactorium calf house, and at the same time their live weight was on 3 kg higher (or on 1,7%) rearers kept in the same period in group cages on the open air conditions. The average daily live weight gain of cattle was also higher on 7,2 and 1,6%, respectively. However, in the conditions of the group husbandry of growing stock in the calf houses there was stated that the analyzed animals were more often ill, so it could be concluded that the presented animal husbandry method could be used only in favorable epizootic conditions in animal husbandry farms. In the conditions of an open air husbandry the ways of infection diseases incidence was substantially lower, and calves showed high development indices in case of complete feed diets application

Research of the selection efficiency of boars of Belarusian meaty and Large White breeds for reproduction and productivity indices was realized in the selection and breeding centre Zadneprovski in the Republic of Belarus. The influence of 25-percentage level of boar selection for sperm production with the dominancy of relative average values of an initial population on statistically significant difference within the limits P less than 0,05-0,001 was proved. Application of an evaluation criterion of animal breeding abilities by the degree of frequency of departures from a population level with a value which reflects the intensity of selection in shares of an average quadratic deviation made it possible to raise the breeding value of boar of both genotypes in accordance with the productive qualities of descendants in comparison with average sizes of populations of two breeds on statistically authentic difference at P less than 0,05-0,001. Decreasing in the studied indicators of efficiency of offsprings concerning initial fatherly forms could be explained by a stronger influence of environment conditions rather than genetic predisposition of genotypes to the given traits

Studying of peculiar features of external conformation of replacement gilts used for the further closing stage of commercial cross breeding as well as for the further productivity of first litter gilts was realized in the conditions of a swine breeding stock-rearing farm of the Republic of Belarus. In the modern zootechnic classification it is reasonable to divide pigs into 3 constitutional types of their external appearance: leptosome, transitional, and oerisome. In the conditions of industrial engineering the replacement pigs and sows of transitive type in comparison with individuals oerisome and leptosome types were characterized by higher productivity: early terms of insemination (on 3,2 and 3,3 days, respectively); livability of stores at weaning stage (on 5,8 and 5%, respectively), higher litter size at weaning stage (on 7,1 and 6,3 kg), higher input share into the basic pig stock (on 4 and 6%), and a yield of a gross of body weight gain of litter at fattening with a view to farrow (on 8 and 10%). Piglets of the transitive type sows were characterized by the steadier parameters of metabolism in comparison with stores of leptosome type sows (there were less frequently encountered the disturbances of infringements of trace mineral and calcium and phosphoric metabolism). On the basis of the realized research there were developed the technical specifications of the Republic of Belarus 600039106.001-2004 Replacement gilts; Manual on appraisal of quality of pigs for repair of herd of a pig-breeding complex; the Technological instruction on herd repair of a pig-breeding complex; production schedules Normalization of reproductive function of replacement pigs in the conditions of a complex

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