Don state agrarian University
Author list of organization
List of articles written by the authors of the organization
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MATHEMATICAL MODELING OF MTU TENSILE LOAD
DescriptionThe article is devoted to mathematical modeling of random process that occurred in tensile load of serial and experienced MTU. The efficiency of EDM application in transmission is discussed
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MATHEMATICAL MODELING OF MTU TENSILE LOAD
DescriptionThe article is devoted to mathematical modeling of random process that occurred in tensile load of serial and experienced MTU. The efficiency of EDM application in transmission is discussed
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ACTIVITIES FOR FORMATION OF THE DEVELOPMENT STRATEGY OF A BANK IN THE SPHERE OF INDIVIDUAL CAR LOANS
DescriptionThe article discusses the prospects of development of crediting in the Russian federation; the author analyzes the important reasons for the increased costs of cars, as inflation and refinancing rate in Russia and the United States. This article also studied the dynamics of sales of cars on credit in recent years, the terms of the car loan program called “Buy back”. In addition, the calculation of economic efficiency in the changing conditions of early repayment of a classic car loan, implementation of Buy back program, and the efficiency of implementation of project proposals
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MINERAL AND VITAMIN SUPPLEMENT IN FEEDING OF REARING FLOCKS
06.00.00 Agricultural sciences
DescriptionThe studies have determined the effect of bentonite clay, vitamin complex "microvan Blend" and BAKD of local raw materials for the viability, the growth and the development of the young rearing flocks of the “Hisex brown" egg cross. To improve the quality of the grown rearing flocks and pullets increased yield, egg poultry farms were proposed to use the bioactive feed additive (BFA) made from local cheap raw materials (bentonite clay, sunflower oil, drug-soluble vitamins A, D3, E and antioxidants)
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MODELING OF WIND LOADS ACTING ON THE WIND POWER STATION CONSTRUCTION OF THE COMBINED TYPE
DescriptionThe article presents the solution of questions about the intensity of wind loads acting on the wind power station of the combined type in relation to the conditions of the Rostov region on the basis of the structural dynamic simulation
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MODELING REGIONAL SYSTEMS OF BREEDING PIGS
06.00.00 Agricultural sciences
DescriptionThe article contains the experience of the development of the methodology and the computer program for calculation of regional and local systems of pigs hybridization at the example of the Rostov region (Russia). Crossing the GP lines for F1 should be organized in multiplier farm, which may be separate farms and to be part of large commercial farms. For the production of F1 in a multiplier farm, we must breed a purebred specialized paternal and a maternal line, selected on the effect of combining ability. For the successful functioning of the system of hybridization, it is necessary to build a genetic pyramid, including breeding and genetic centers (nucleus farm), multiplier farm, reproducing the baseline. The article gives a detailed calculation of sow population of levels of P, GP, GGP for maternal and paternal breeds of pigs. The program uses user-defined parameters of pigs productivity, of the simulated population, and the parameters characterizing the intensity of selection of young animals. To ensure annual production of 1,822 million pigs in the Rostov region it is necessary to provide the availability of brood stock in the amount of 89 thousand heads, 6 800 heads in the structure of grandparent flocks (GP), 730 heads in the structure of the Grand-Grand-parent stock (GGP), excluding sows second maternal and paternal breeds
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MORPHOLOGICAL AND CHEMICAL PARAMETERS OF OSTRICH EGGS
DescriptionThe article carries out an analysis of morpho-chemical parameters of ostrich eggs when l-carnitine is included in the diet. Studies were conducted on two groups of ostriches: I-received a standard diet, II-to the standard diet received L-carnitine at a rate of 300 mg per 1 kg of feed. From April to August we were studying the ostrich egg production, morphological composition of eggs, chemical composition of albumen and yolk, the amino acid composition of egg yolk, the level of cholesterol, fatty acids including saturated, unsaturated and polyunsaturated. It has been determined, that L-carnitine increases the egg production of ostriches by 24%. The weight of protein in the groups was 56.9-56.2%; yolk-27.6-26.7%; shell-16.4 -16.2%. The amount of cholesterol in the egg yolk of the 1st group ostriches was 12.2 mg, in the 2nd one it decreased by 7.4% (P>0.95) and amounted to 11.3 mg per gram of yolk. The level of amino acids in the egg yolk of the 1st and 2nd groups was approximately equal. The number of fatty acids in the 1st and 2nd groups was: saturated 39.5 and 39.7%, monounsaturated 49.99 and 49.80%, polyunsaturated 10.37 and 10.47% respectively. The sum of unsaturated and polyunsaturated fatty acids in ostrich eggs was 60.36 - 60.27%. The sum of ω3 and ω6 fatty acids is 10.18 and 10.25%. Ratio ω3: ω6-1: 3,3. The ratio of polyunsaturated to saturated acids was approximately 1:3, and polyunsaturated + monounsaturated to saturated-1.52 units (approximately 1.5 : 1).
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MEAT PRODUCTIVITY OF BULL CALVES UNDER INTENSIVE REARING
DescriptionThe article presents a comparative assessment of the meat productivity of young cattle of the two most common intensive meat breeds in the Russian Federation (Aberdeen Angus and Hereford) in comparison with the most numerous native in the South of the country domestic breed, which is Kalmyk. Intensive rearing from 9 to 18 months of age was carried out in the conditions of industrial fattening complex on rations not containing juicy forages. In the process of 273-day intensive rearing, in bulls of the tested breeds average daily live weight gains from 1455 to 1526 grams were achieved. During this period, an absolute increase was obtained in Aberdeen-Angus bulls-416.6 kg, in peers of Hereford and Kalmyk breeds-413.6 and 397.2 kg. The highest pre-slaughter live weight and slaughter rates were noted in Aberdeen-Angus bulls, having a yield of a pair carcass of 59.4 % and a slaughter yield of 62.8 %. The meat of Aberdeen-Angus bulls has the highest content of fat and dry matter, but they have less protein, lower pH and moisture binding capacity and a higher loss of meat juice during cooking, compared with the bulls of the Kalmyk breed. It was confirmed that the coefficients of transformation of protein and energy into products are closely related to the intensity of growth and weight of the carcass. The most effective of these indicators were in bulls of Aberdeen-Angus, then Hereford and Kalmyk breeds. A similar pattern between the breeds was manifested in terms of profitability and cost recovery
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MEAT PRODUCTIVITY AND MEAT VALUE OF THOROUGHBRED AND MIXED PIGS
06.00.00 Agricultural sciences
DescriptionIn the article, the influence of "Tykvoglilakt" biologically active additive on productivity of pigs and food meat value got from thoroughbred and mixed animals is presented
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MEAT PRODUCTIVITY OF CROSSBRED SHEEP CALVES
06.00.00 Agricultural sciences
DescriptionThe article presents the results of the control slaughter of purebred and crossbred lambs. It was found that the index of compactness and the main killer performance superiority had two or three breed lambs obtained from crosses involving sheep southern meat breed. The experimental animals were taken measurements of carcasses, which give a fairly complete and objective view of the differences in the length of the torso, hips, mascara and hip girth. There are specific differences in the yield of the most valuable cuts of the first grade the rams depending on the origin. The superiority of crossbred calves over the control for this indicator amounted to 16.4 and 33.4%. The chemical composition of the meat fine-wool lambs contained more moisture and less fat and less calories than meat crossbred animals. Increasing the hybrids values of the protein quality index indicates an increase in meat share of muscle proteins and the reduction of connective tissue, and consequently, improving the quality of the raw meat. Animals obtained by crossing, have wide and deep body, well-developed muscles of the thighs, the best quality characteristics of meat productivity