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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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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TO THE PROOF OF THE NONDEMOUNTABLE METHOD OF REPAIR OF THE HIGH PRESSURE FUEL PUMP
DescriptionThis article discusses the application of the method of selective transfer to restore the plunger pairs of high pressure fuel pumps of diesel engines. To restore plunger pairs the authors of the article propose to use an anti-friction repair-and-renewal composition on the basis of the mineral serpentinite
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LANDSCAPING RECREATIONAL AREAS FOR WALKING IN A MOUNTAIN FOREST
06.00.00 Agricultural sciences
DescriptionThe aim of this study is the substantiation of recreational zones in the mountain forests for walking tourists. The article contains a functional zoning, design and spatial solution of landscapes of these zones. The aesthetic and recreational value of forests recreational areas increases the implementation of thinning. Implementation of thinning in the territory of the forest zone allocates places for relaxing and walking. This is the basis of functional separation of recreational areas. Coordinates of the objects of recreational areas (inputs and outputs, the center of the composition, toilets, natural monuments, gazebos, crossing trails and wooden sculptures) are determined using GPS satnav. We can determine the spatial composition of landscapes with forest vegetation, relief and water space. This allows you to allocate places for sight-seeing platforms. Small architectural forms must be in harmony with the surrounding landscape. Walking paths form the basis recreation areas. Turns and bends of routes for walking must comply with the elements of the landscape. Areas for recreation are usually located along the trail in of water bodies and in places of disclosure prospects. The recreation area is limited to with an enclosure which fits into the forest landscapes. In this case, the fence should not interfere with of migration of small animals (herpetofauna, insectivores, and others). The harmony of landscape elements serves as a criterion of completion of design. In the recreation area fire prevention measures have to be carried out by tenants. Permissible load of tourists to recreation areas is determined by a special technique. Conclusions: there was proposed a new kind of recreation facilities in the mountain forests - the zone for walking tourists. When carrying out forestry works, there will be a minimum of expenses on arrangement of the zone. Negative consequences to the forest environment would also be minimized
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COMPATIBILITY OF VARIOUS DOSES OF ECOVENTURA AND LIMESTONE IN FEEDING OF REPLACEMENT YOUNG DUCKS
06.00.00 Agricultural sciences
DescriptionThe research is aimed at studying the compatibility of different doses of ecoventura (TU 9283-199- 10514645-13) and limestone in the diets of rearing of ducks of "Blagovarsky" cross and the impact on productive performance. As a result of scientific and economic experience obtained data on the dynamics of live weight in groups of rearing ducks indicate that ecomentors in combination with limestone have a growth promoting effect and a positive effect on the growth of ducklings. Best growth depending on dose administration of ecoventura and limestone in feed composition had a rearing ducks III (ecomentors (1,0%) + limestone (3,0%) by weight of the feed) and IV experimental groups (ecomentors (1,0%) + limestone (3,5%) by weight of the feed). The results of the study measurements (body length, keel length, breast width, chest girth, chest depth) and indices stature (massiveness, the meat content, arizonia), which were higher in males and females when fed with mixed fodder with the introduction of ecoventura and limestone in an amount of 1.0 and 3.5% respectively. Introduction to feed composition of ecoventura and limestone in an amount of 1.0 and 3.5%, respectively had a positive impact on exterior indicators of rearing ducks
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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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OPTIMIZATION TECHNIQUES FOR PCRRFLP FOR GENOTYPING SHEEP
06.00.00 Agricultural sciences
DescriptionDiagnosis by PCR-RFLP (polymerase chain reaction – polymorphism of the lengths of restriction fragments) is the standard analysis of point mutations for the diagnosis of allelic polymorphism of candidate genes related with productive qualities of farm animals. Along the length of the fragments (RFLP) make a conclusion about the absence or presence of the point mutation, and homozygosity or heterozygosity of the individual. The aim of our work was the optimization of protocols for conducting PCR-RFLP analysis for genotyping sheep for genes of the growth hormone gene differential growth factor and gene of calpastatin
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Description
The article discusses different types of drive axles of all-wheel drive machine. It is shown that if blocked drive of driving axle easy, it is able to provide the best traction drive qualities of the all-wheel car, if compensation of kinematic mismatch in movement of front and rear wheels. The article provides analysis of the causes of kinematic mismatch and its consequences. The analysis was given for the existing methods to reduce negative influence of kinematic discrepancy on the work of the four-wheel drive wheeled machine in locked mode. The method of reduction of kinematic mismatch by regulations of the air pressure in the tires of the wheels with one-time control of the leading moments on the axes was suggested. We show the relationship between the difference of kinematic radii of the wheels of different axles and the difference of the moments leading to them. The algorithm and description for the system of automatic control of air pressure in the tire, which realizes the proposed method, were presented. We have described experimental methods of determining the energy losses evaluation from kinematic mismatch when moving all-wheel drive machine. The article presents the results of the this assessment in relation to the agricultural wheel tractor of class 5 moving at different substructures
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PRODUCTIVITY INDICES OF MEAT PIGS USING THE "VITA SELENIUM" AND "TOPINAMBUR" AT CULTIVATION
06.00.00 Agricultural sciences
DescriptionStudies were conducted on pure-bred pigs CT and DM-1. Determine the productivity of meat quality, thickness and quality of the bacon, the physicochemical quality of meat, histostructure longissimus dorsi experienced pigs fattened using dietary supplements
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ORGANIZATIONAL-ECONOMIC ASPECTS OF INCREASED ACTIVITY OF SMALL AGRIBUSINESSES
DescriptionThe development of the agricultural sector involves the increasing entrepreneurial activity of small agribusiness in the conditions of the market. This requires the formation of the organizationaleconomic mechanism. It acts as a system of relations arising between the state and the entities. One of the basic conditions in the solution of this problem is state support of small agribusiness at various levels. In addition, it is necessary to create a better organizational-economic mechanism of development of this type of business in the agricultural sector, which is aimed at creating and strengthening the competitive environment of agricultural producers. This article discusses the main directions of formation of the elements of the organizational-economic mechanism of development of small agribusiness in the proletarian district of Rostov region. In the area gets the development of competitive selection of farmers for the development of the agribusiness in animal husbandry. It helps to increase the livestock of farm animals in peasant (farm) area. The creation of a wholesaledistribution center on the basis of the agricultural consumer co-operative will contribute to the development of marketing infrastructure, primary processing, storage and transportation of agricultural products produced by small businesses in the area. The organizers of the marketing and logistics chain, which are wholesale distribution centres not only provides the most efficient distribution of the produced agricultural products, but also allows in General to increase the activity of the small agribusiness