The research directed on perfection of a cattle protein food system, taking into account its fractional structure, and also establishment of objective indicators of an estimation of forage protein nutrient density, have great value. It is established, that for young growth of cattle of 4-6 months of age the optimum parity of decomposable and un-decomposable protein in rations corresponds to size 68:32, allowed to raise digestibility of nutrients on 3-4%, nitrogen adjournment in an organism of animals on 10% and daily average a gain on 4% in comparison with parity 80:20. The optimum parity of fractional structure of protein makes positive impact on oxidation-reduction processes in organism to what testifies morphological-biochemical structure of blood. Thus concentration of crude protein raises on 1,7%, urea quantity decreases on 23%. The least cost price of a gain has appeared in group with a parity of decomposable and un-decomposable protein in rations 68:32, or it is better on 4,4% than an indicator of group with a parity 80:20%

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

Investigation of the efficiency of ethylene glycol and sucrose application in the capacity of cryoprotectors for cryopreservation of cattle embryos and their thawing in the conditions of application of saline solutions (as their dissolution medium) and nutritive media with a various structure was realized in the conditions of the Republic of Belarus. Research results showed that application of ethylene glycol in concentration 1,5 M and sucrose in concentration 1,0M proved to be the most effective. Regardless of the applied media the average safety of embryos was 93,8-96%, and acceptability - 59,3-62,5%. Peculiar feature of ethylene glycol use as cryoprotector for preservation of cattle embryos was that it could be quickly absorbed by a cell and quickly deduced from it. It made it possible to realize embryo transfer immediately after thawing. Application of ethylene glycol and sucrose as cryoprotectors could considerably simplify the procedure of transplantation of the frozen-thawed embryos, practically reducing it to a procedure of artificial insemination

In the pig enterprises of Belarus the most widespread sources of heat for pigs heating proved to be the infrared radiation lamps. In recent years there was stated the wide application of electric heated rugs of various designs or the electric heated floors. The special brooders, equipped with various sources of heat, passed the experimental check possibility of use for heating of pig houses. Their advantage was in decreasing of heat losses in the sleeping areas of pigs that demanded lower expenses of energy for heating of stores. However, till the present the effective brooder design, which could be convenient in use, cheap, easily sanitized and providing an optimum microclimate for piglets, was not offered for the production yet. Agricultural enterprise Kadehks has developed a design and the pre-production model of a warmed den for pigs under the name Logovo Dlya Porosyat UKhL-4 (Logovo). Application of brooder Logovo in combination with the warming plate made it possible to design more favorable mode for sleeping areas of pigs, to reduce preheating time of plates up to 10 days, to save (in comparison with incandescent lamps) up to 155 kw/h of electric power used for heating of pig sleeping area without decreasing their growth rate and safety. Application of the presented device in combination with heating plates made it possible to reduce the expenses for pig production and for the equipment of heating plates temperature regulators. Application of the differentiated heating mode with the possibility to deactivate the heating plates from the electric power sources after 10 days of the suckling period made it possible to lower the expenses for production of female socket of pigs

Beef production in the Republic of Belarus could be competitive only in case of development of the specialized beef cattle breeding. Therefore, for the increasing of beef production and improvement of its quality in Belarus there was noted the necessity to use cattle beef breeds both in case of straightbred breeding, and in crossing with low income-earning Black-and-White cow stock. Research results showed that hybrid Gereford x Black-and-White breeds of the first and second filial generations showed higher reproductive abilities which were manifested in 105-120 days age reduction at the stage of the first insemination, 18-44 days reduction of service period, 0,07-0,1 times increasing of breeding efficiency index, 9,8-14,4% increasing of calf crop per 100 dams, and 14,4-16,4% increasing of young stock livability in comparison with the Black-and-White breeds calves. Research results showed that the non-heating season of the mongrel Gereford x Black-and-White heifer breeds of the first and second filial generations was 396-400 days, breeding efficiency index (rate of fertilization) - 1,29-1,32, breeding performance index - 85,4-90,0%, while for the at Black-and-White heifer breeds the same indices were 425 days, 1,29 and 75,6%, respectively

Results of realized in the conditions of the Republic of Belarus energy estimation of veterinary and hygienic methods of microclimate organization in livestock buildings were presented. As a result of the conducted veterinary and hygienic estimation of conditions of cattle maintenance in premises at cattle breeding farm in Vitebsk region (Belarus) it was found out, that one of the reasons of decreasing in productivity and livability of calves was the unsatisfactory microclimate at livestock buildings. In particular, air temperature in calf houses was marked below standard on 25-29%. Indices of the relative moisture exceeded the standard requirements on the average on 7% and concentration of ammonia - on 19-24%. Natural and artificial light exposure at premises did not correspond to veterinary and hygienic requirements. Research results analysis showed that a principal reason of unsatisfactory microclimate condition was the unsatisfactory system of ventilation, application of artificial prompting of air that involved the exceeding expenses for the electric power. The veterinary and hygienic measures with regard for power economy were characterized. It was stated that the proper use of ventilation, manure removing, feed-supplying and lighting systems made it possible to save up to 30% of power energy

The necessity of creation of the optimal conditions for production of high-quality dairy products was conditional upon the fact that milk is very unstable by its chemical and physical indicators biological liquid. There is no point in improving milk quality after the realized production. Results of the realized in the conditions of the Republic of Belarus evaluation of milk according to the sanitary and hygienic indices for the further improvement of its quality were presented. According to the data on milk purchasing it noted that in Belarus there was stated a noticeable reduction of milk quality in accordance with its grade of quality. Throughout the last years the relative density of realization of the premium quality milk was less than 50% (46,5% - in 2005, 48% - in 2006), and at the same time, the volume of sales of the second second-rate quality milk reduced on 7,6%, and volume of off-grade milk - on 0,7%. Milk quality at the studied in course of investigation dairy farms in the majority of cases was conditional upon such indicators as base-titratable acidity, bacterial number and quantity of somatic cells in milk. Titrate acidity indices in over than 36% of milk does not correspond in to standards of the Republic of Belarus. Evaluation of bacterial number in the produced milk showed that its main production volume (65,2%) corresponded to the first and second grades and 6,7% were off-grade quality. Somatic cells content in the studied milk samples in 27% corresponded to the extra fine grade, and only about 2% of the analysed milk samples corresponded to off-grade milk

The growth and development of replacement gilts of different precocity and age depending on the terms of transition from herd-producer to the market area of a complex was studied in the conditions of the Republic of Belarus. Animal transfer into new housing conditions affected the early maturing and super early maturing breed pigs of experimental groups. It was determined that moving of replacement pigs into the market area of the complex at the age of 115 days made it possible to obtain higher indices of swine productivity. Fertilization rate of sows of the first experimental group after the first insemination made up 77,6%, that was higher on 6,2% and 9,5% in comparison with the control and the second experimental groups, respectively. The advantage of the first and second experimental groups over the control one was stated in a higher multiple fetation on 0,4 heads and heightened heavy litter indices on 0,1 kg; the quantity of weanling was higher on 0,6 and 0,5 heads, on litter weight at weaning was higher on 7,1 and 3,8 kg, respectively

Results of estimation of the real possibilities of milk production of extra fine grade in the conditions of the Republican unitary enterprise Educational Farm of Belarus State Academy of Agriculture in Mogilev region (Republic of Belarus) were presented. It was established, that carrying out of some organizational and technological actions for decreasing the level of somatic cells in milk made it possible to lower the level of somatic cells in finished products from 494,72 thousand per cube cm up to 289,15 thousand per cube cm. The obtained data corresponded to requirements of the Standard of the Republic of Belarus (STB 1598 - 2006 Cow milk. Requirements at purchases to the grade milk Extra). The realized experiment was developed on the basis of analytical model of cow commercial herd, constructed on the basis of the analysis of results of evaluation of quality of individual tests. Sales level of extra fine grade milk at the dairy commodity complex Parsino (Republic of Belarus) was 90,6%