Don state agrarian University
Author list of organization
List of articles written by the authors of the organization
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GROWTH, FATTENING AND MEAT QUALITY OF MARKETABLE PIG HYBRIDS WITH EARLY WEANING
06.00.00 Agricultural sciences
DescriptionThe results of studying of growth, fattening and meat qualities of marketable grosses from large white, Landras and Dyurok breed crossing have been cited in the article. Optimum pig weight when early weaning was established
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06.00.00 Agricultural sciences
DescriptionWe have selected a group of test animals and formed a set of techniques for the research. The article gives an evaluation of fattening qualities (precocity, average daily gain, feed consumption per 1 kg of gain) of purebred and crossbred pigs. We present the dynamics of body weight and body length for the experimental pigs, productive qualities, the thickness of back fat of experimental animals to achieve the 100 and 130 kg of live weight
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THE ROTARY METHOD AND THE APPARATUS FOR INTRA-SOIL HOEING
06.00.00 Agricultural sciences
DescriptionThe essential new approach to soil processing taking into account its origin as a geologically disperse body is offered. The soil should be processed not only using its natural dispersion, but also optimizing this geological deposit taking into account decrease in its dispersion in process of a geological and biological sedimentation in the field of weight of Earth. The new technical solution is proposed for rotational intra soil cultivation. The problem is solved to transfer a torque to the tool being inside the processed geological body
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BREEDING OF PIGS FOR MEAT QUALITY
06.00.00 Agricultural sciences
DescriptionThe article presents the analysis of the influence of meat output and the percentage of lean meat aimed at breeding of pigs for meat qualities on the amount of muscle tissue in the carcasses of slaughtered gilts. Selection models, which allow to determine the average daily growth and the cost of feed for education of lean meat are given
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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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IMPROVEMENT OF STEPPE RED CATTLE WITH A CAPACITY OF AYRSHIRE AND HOLSTEIN BREEDS
06.00.00 Agricultural sciences
DescriptionThe article presents the results of the studies of the effect on heifers of Red Steppe breed and hybrids, inclueding their growth, form of the udder, milk production. The cows breed was improved by Ayrshire bulls and red -and-white Holsteins in the South zone of the Rostov region
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IMPROVING THE CHEMICAL METHOD OF CONTROLLING WEEDS ON SUNFLOWER
06.01.01 General agriculture, crop production (agricultural sciences)
DescriptionCurrently, there is no effective chemical protection of sunflower crops against dicotyledonous weeds during the growing season of the crop, except for systems that provide for the use of herbicides called Evro-Laiting, Zonator or Express. The disadvantage of these systems is the limited composition of cultivated sunflower hybrids and high costs. The article presents a research on the development of an effective system of chemical protection of sunflower crops against dicotyledonous and monocotyledonous weeds during the growing season of the crop. The greatest effect in the suppression of weeds in sunflower crops was observed by application of the herbicides Goal 2E and Senator on the germination of crop. In these versions of the experiment, the highest seed yield and oil harvest are also noted. However, the use of the Zonator is limited only to drug-resistant sunflower hybrids. The use of the herbicide Goal 2E is possible on any varieties and hybrids of sunflower. Despite the damage to the first two real sunflower leaves when using the herbicide Goal 2E for vegetation, the plants are fully restored, which does not significantly affect the productivity of the crop. The proposed schemes for using herbicides can improve the technological and economic efficiency of controlling monocotyledonous and dicotyledonous weeds in sunflower crops
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MODERN STATE AND TENDENCIES OF DEVELOPMENT OF MEAT CATTLE BREEDING OF RUSSIA
DescriptionThe article reflects modern condition of production of meat of cattle in Russia. We have analyzed the population dynamics of the cattle population and beef production and thee main problems that accompany the functioning of the beef cattle industry. We have given the measures of state support of the industry, to solve problems for which the Ministry of agriculture has developed a program to support the development of beef cattle. Considering prospects and possible risks of development of domestic the beef cattle industry, we have specified a need of such development of the branch; it has to be based, first of all, on implementation of large-scale projects on the basis of the competitive meat breeds of world level. On the basis of the findings we have identified the forecasts for the domestic producers, based on the current market dynamics. Solving the problem of providing the population with beef is possible at the expense of specialized meat cattle breeding. In order to improve economic efficiency of meat production of cattle we must not only find internal reserves and improve industrial relations economic relations, but the establishment of integration structures in the form of unions of agricultural enterprises, processing enterprises and marketing organizations, as well as large-scale economic and legislative support from the state
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MODERN METHODS AND FACILITIES OF DECLINE OF TOXIC LEVEL OF WORKING GASES OF DIESEL ENGINES
DescriptionThe problem of environmental protection from toxic contamination, i.e. toxic products contained in exhaust gases, is one of the most pressing in the modern world. Currently, internal combustion engines and vehicles of transport and technological machines rank first in power supply in the global energy balance. The total amount of pollutants released into the atmosphere by tank-automotive equipment exceeds more than three times the emissions released by industrial companies. Besides the vast majority of tracked and wheeled vehicles are equipped with diesel engines, which excel gasoline engines in harmful substances released together with exhaust gases. Therefore the problem of emission control becomes more and more urgent. The aim of this study is the analysis of modern means and methods of reducing the toxicity of exhaust gases released by diesel engines. The existing methods of emission control can be divided into four groups: improving the design of the internal combustion engine; the accounting of operational factors affecting the toxicity of exhaust gases; the use of unconventional fuels; the exhaust gases cleaning in the exhaust pipe. Each method has several major ways to reduce the emission of toxic substances, which are often mutually complementary. We have cited the research date of influencing each of the methods on the emissions of toxic substances in exhaust gases. We have found that reducing the emission of toxic substances in compliance with Euro-6 requirements can only be obtained by the simultaneous use of several methods of reducing emissions. We have proved the effectiveness and economic feasibility of using combined neutralizers to clean exhaust gases
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CREATING NEW LAMB MEAT PRODUCTS
06.00.00 Agricultural sciences
DescriptionThe article researches a question of effective using of meat of sheep and chicken meat for increasing of product list