In the conditions of the Republic of Belarus there was studied the possibility of increasing of meat yield productivity of ducklings of Temp cross in the conditions application of parental lines of Peking ducks of German breeding Stolle Seddin Vital (SVV) cross. In course of the study there was realized a comparative evaluation of linear and crossbred ducklings in accordance with meat qualities and blood indexes. There were presented the results of morphological composition of liner and crossbred duck carcasses; dynamics of changes of lipid exchange (total lipids; cholesterine; triglyceride) of ducklings; morphological composition of carcasses of father and mother combinations; blood indexes of ducklings; blood indexes of crossbred ducklings of final combinations. Research results showed that crossbred ducklings had high meat properties which exceeded the purebred ones. In ducklings with lower indexes of fattiness of carcasses there was noted the lowering of concentration of total lipids, cholesterine and triglyceride in blood.

Realization of veterinary and sanitary examination of meat and slaughter products of calves treated with hyperimmune serum against cattle colibacillosis was conducted in the conditions of the Republic of Belarus. There were formed two groups calves of 3-5 days old. Calves of the first group were treated with serum biological preparation of trial series produced at Vitebsk Biofabrika (Belarus). Calves of the second group were intact animals. Calves of each group were killed in 14 days after preparation application for realization of veterinary-sanitary examination. Slaughter meat was studied in accordance with the following indexes: pH; peroxidase activity; presence of products of primary protein breakdown; moisture content; relative biological value of meat; bacterial examination. The research results of organoleptic indicators showed that meat of both groups corresponded to the standards. Hyperimmune serum against colibacillosis of live-stock animals did not render negative influence on organoleptic, physical and chemical indexes of meat. Indexes of the relative biological value in meat of calves treated with the examined serum were higher than the similar indexes of intact animals. Meat of all examined animals did not have any germs of toxico-infections and toxicoses

Analysis of influence of boar genotype by MUC4 gene on viability of progeny was realized in the conditions in the Republic of Belarus, as well as the evaluation of possibilities of association of polymorphic variants of gene with fattening and meaty qualities of obtained from the boars progeny were conducted. In course of studies there was analyzed the polymorphism of MUC4 gene at producer boars of studied breeds. There was revealed high occurring frequency of desirable allele MUC4**c and MUC4**cc genotype in all studied populations. Boars of Belarusian Meaty breed with genotypes MUC4**cc by MUC4 gene authentically (P less than 0,01) exceeded boars with genotype MUC4**cg according to piglet viability indexes at weaning period on 5,6%. For the further evaluation of the potential role of MUC4gene in marker selection there was realized determination of relations between genotypes of studied marker and other economic traits of swine (fattening and meaty traits of boar progeny). There was stated the authentic increasing of fattening and meaty traits of stores obtained from boars with homozygous genotype MUC4**cc in comparison with progeny fathers of which in their genotype had mutant allel MUC4**g. For the forecasting and modeling of genotypes resistant to colibacillosis there was presented a scheme of selection boars and sows of different genotypes by MUC4 gene for the increasing of progeny viability. According to the scheme the preferred selection was MUC4**cc x MUC4**cc. This selection was recommended for the self-replacement and creation of nuclear stock

The comparative analysis of parameters of an estimation of own efficiency of animal Landrace and Yorkshire breeds of the Canadian selection and their descendants has shown, that young pigs of the first generation surpassed the parents in a daily average gain, and in too time conceded on body length and fat thickness

The present research deals with slaughter and morphological characteristics as well as physical and chemical properties of meat of young hogs taken off fattening estimated bearing relationship to back fat thickness of sow. The above data have been obtained in the commercial swine production farm specialized in three-way rotational crossbreeding in its breeding programme

For the well-timed prevention and treatment of sick animals there was analyzed the therapeutic efficiency of a produced survivor serum against acute respiratory diseases of sheep and lambs, as well as Catosal in combination with Nitox 200 against the mixed flow of parainfluenza-3, adenovirus, respiratory syncytial, chiamydial and pasteurellosis infection. Comparative efficiency of all mentioned preparations was presented. Research results showed the correct and timely application of drug preparations as well as their qualitative selection made it possible to lower the death cases. Application of the presented survivor serum in combination with Nitox 200 and Catosal made it possible to lower the loss of cattle in 4-5 times and increase the viability rate of animals

In the conditions of the Republic of Belarus there were presented the results of a veterinary and sanitary assessment and bacteriological investigation of sheep slaughter products, which showed meat serviceability for consumption after application of Triclafen suspension. Application Triclafen suspension did not render negative influence on an organism of animals. It was proved by organoleptic and laboratory research of meat of slaughter animals of experimental and control groups. The meat obtained from healthy sheep which were administrated the suspension in accordance with microbiological indicators proved to be of good quality and corresponded to the established norms (Sanitary regulations and standards 11 - 63 Republic of Belarus 98): it had the general bacterial content within admissible limits and did not contain agents of anthropozoonosts, alimentary toxicosis and toxinfections and it can be sold without any restrictions.

Evaluation of amino-acid, mineral, and vitamin content, as well as indexes of meat safety obtained from young stock of cattle of different genotypes in accordance with possibility of its application as raw material for baby food production was realized in the conditions of the Republic of Belarus. In course of study there were used bull calves of white-and-black breed, Limousin breed and their crossbreeds. Research results showed that young stock of Limousin breed, Limousin x white-and-black crossbreds, and white-and-black breed (control group) gave high quality meat. In meat of animals of experimental groups there was stated high quality of almost all nonessential amino acids and nonreplaceable amino acids, in meat of crossbreeds there was noted considerable increasing of polyunsaturated fatty acids. In it there was 12,31% of linoleic acid against 4,75 in Limousin breed and 2,77% in white-and-black breed; and eicosatetraenoic acid – 2,4% against 1,24% and 0,7%, respectively. Also in meat of experimental bull calves there was stated higher content of vitamins, calcium and phosphorus, while the content of cuprum and zinc decreased

It is determined on the basis of conducted researches on perfection of energy-protein nutrition norm of young cattle of 6-12 months of age that 11,5 MJ of exchange energy at 6-7 months of age and decease to 10 MJ for 12 month of age is needed in 1 kg of dry matter to get 1000 g of average daily weight gain. 8-9 g of digestible, 5 g of non-digestible protein should come for 1 MJ of exchange energy of a diet. 1 kg of DM (Dry Matter) should contain 133-150 g of crude and 46-54 g of non-digestible protein