Don state agrarian University
Author list of organization
List of articles written by the authors of the organization
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06.00.00 Agricultural sciences
DescriptionThe features of milk production of Holstein Friesian imported heifers to Krasnodar region from Germany with a view of linear supplies and their ancestors on the main indicators of productivity and breeding value are shown. A comparative analysis of the productive qualities of the German Holstein-Friesian with Black Pied cattle domestic breeding is made. The ways of the effective use of the Holstein Friesian German-breeding to create a highly productive dairy cattle herds in the North Caucasus are outlined
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06.00.00 Agricultural sciences
DescriptionIn the article, the estimation results of reproductive, fattening and meat qualities of pigs of various types of nervous activity and state of cardiovascular system are given. The degree of influence of nervous activity on productive pig qualities has been shown
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PRODUCTIVE QUALITIES OF CATTLE OF KALMYK BREED OF DIFFERENT LINES
06.00.00 Agricultural sciences
DescriptionThe analysis of productive qualities of descendants of bulls of various linear kind has been presented in this article
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06.00.00 Agricultural sciences
DescriptionThe article presents the research focuses on determining the parameters of physiological and morphological and functional features of the digestive and reproductive systems of young and laying hens under the influence of the mineral component of the diet of local origin (ekobentokorm) in combination with biologically active substances developed and prepared by compounding (vitamin-mineral adsorption feed additive - VMAKD)
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05.20.00 Processes and machines of agroengineering systems
DescriptionThe aim of the work is to establish rational parameters on the basis of analytical and experimental research, in terms of obtaining the maximum performance of the unit based on a class 5 tractor, an automatic gear shift system. We have proposed a device for automatic gear shifting, in which the pressure of the working fluid in the pneumatic-hydraulic accumulator installed in the power transmission of the tractor of the elastic-damping mechanism, equivalent to the engine torque, was used as an input signal. The task of optimizing the tracking device and the actuator of the automatic shift system is the definition based on the theory of automatic regulation of the rational flow cross section of the damper throttle and the time delay of the system response to ensure the input signal with the necessary filtering in frequency and phase. The study presents the results of the tests carried out under laboratory conditions, which showed that the automatic gear shift system provides gear shifting at an external load frequency in the range from 0 to 0.24 s-1, direct assessments of the quality of the automatic gear shift system: oscillation (0), overshoot (0%) and time of the transition process (2...4 s), meet the requirements for their work. The analysis of the results obtained in experimental studies showed that the productivity of the machine-tractor plowing unit with a class 5 tractor-model equipped with the developed system of automatic gear change is higher by 10.6%, and the specific fuel consumption is 8.1% lower compared to the serial version
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THE REGULATOR OF VACUUM LEVEL FOR A TEAT CUP WITH ELECTROMAGNETIC DRIVE
DescriptionThis article describes the vacuum regulator of teat cup for automated control of adaptive control system milking cows with electromagnetic drive. There were listed differential equals describing working condition of vacuum regulator and its concept and functional schemes and results of experimental researches
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Description
The article contains the results of machine-tractor unit’s researches on the basis of a class 1,4 tractor having a variable rotary mass of the engine. It is concluded that the use of additional rotary mass being linked at corresponding regimes of motion to the engine’s shaft or primary transmission shaft at the tractor furthers the improvement of operation indexes of a machine-tractor unit
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RELIEF, FERTILITY OF ORDINARY BLACK SOIL AND EFFICIENCY OF SUMMER BARLEY
06.00.00 Agricultural sciences
DescriptionVariability of soil effective fertility and efficiency of summer barley in agro landscape with a complex relief is discussed in this article. Differentiated system of barley fertilizing is offered
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Description
In the context of implementing programs on reducing budget expenditures for the social sphere utilities, it is urgent to intrude renewable energy sources into the practice of their energy supply. However, despite all their diversity, not all constructions based on renewable energy sources can be used under conditions of urban development. Besides, the mutable nature of the solar radiation coming on the Earth's surface requires specific forecasts and calculations of its intensity. Accurate estimation of the area solar energy potential of the generating plant proposed location allows not only to justify its parameters at the design stage, but also to predict its operating mode and to evaluate its technical and economic efficiency. The purpose of the article is to estimate the level of solar radiation for Volzhsky, Volgograd Region, at the initial stage of designing and justifying the implementation of power plants transforming renewable solar energy in urban areas. In the article, it is proposed to apply method for estimating the solar energy potential of at a specific geographic point, based on a combination of the calculation method for determining the solar radiation characteristics and actinometric measurements. Volzhsky of the Volgograd Region, like most settlements in the Lower Volga region, has a high solar energy potential: 1228.8 kWh / m² for the horizontal surface of the southern orientation of the receiving surface of power plants, which can be increased by 16.2% at its optimal orientation relative to the horizon and the sides of the world. However, the expansion of the utilization of the solar energy potential of the district may be limited to the location of the existing buildings and structures at which power plants may be located in urban development conditions
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THE GROWTH AND PRODUCTION ABILITY OF SHOOTS AT DIFFERENT VARIANTS OF CUTTING FRUITBEARING VINES
06.00.00 Agricultural sciences
DescriptionThe article presents the results of studying the impact of different options for cutting fruit vines on the growth and productivity of shoots of the grapes. The obtained experimental data indicate the excessive overload of vines with eyes and shoots when performing contour trimming bushes without normalizing the choice of shoots, in comparison with other variants of experience. A significant increase of eyes on the vines when performing contour cutting was because during this method of cutting, the cutoff is at a certain level all the shoots are horizontal on the arm vines. A big load of vines shoots when performing contour cutting has reduced the length of shoots at 48 – 51%, and leaf area developed on the shoots of 53 – 54%. While the lowest productivity was different shoots developed on the vines in 3 variant, because here the contour cutting vines was not accompanied by a subsequent breaking of superfluous shoots, which have overloaded the bushes shoots. At the same time, contour cutting vines with subsequent breaking of the normalizing excess shoots were allowed to grow for fruiting the bushes a sufficient amount of normally developed shoots with high productivity and good quality bunches