Don state agrarian University
Author list of organization
List of articles written by the authors of the organization
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GENETIC DETERMINATION OF BACKFAT OF PIGS
06.00.00 Agricultural sciences
DescriptionThe article presents an analysis of the influence of genes MС4R and POU1F1 on backfat of pigs. Shows the frequency of alleles and genotypes for genes MС4R and POU1F1 and their relationship with the parameters of backfat
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06.00.00 Agricultural sciences
DescriptionStudies were conducted on pure-bred pigs CT and DM-1. An analysis of variance of economically useful signs and interior indicators pigs using dietary supplements "Vita selenium" and "Jerusalem artichoke"
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REGULARITIES OF DEFLECTION IN THE DIAGONAL AND RADIAL TIRES OF THE GRAIN COMBINE PROPULSIONS
DescriptionThe aim of the study is to investigate the regularities of deflection in the diagonal and radial tires for the grain combine propulsions of high productivity. The research method is experimental. The "tire tester" and specially designed devices for revealing the deflections of the inner and outer tube relative to the rim in the circumferential and radial directions have been used. The outcome indices of the pneumatic-tired wheel are determined with the tire capability to deflect so, that at low - hysteresis losses in the rubber-cord casing and its acceptable tensions, based on a resource, the largest area of contact with supporting base would be created. This circumstance acquires the particular significance developing tires for grain combines of high performance, the deflection regularities of which are poorly studied at present. The analysis of experimental studies showed the feasibility of using the grain combine propulsions instead of the diagonal radial tires of the same size. The resistance to rolling of radial tires 30.5 R-32 is lower than in diagonal tires 30.5 L-32, and the developed contact area due to the increase of length is higher, which reduces sealing effect on the soil
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WINTER HARDINESS AND EFFICIENCY OF THE WINTER RAPE DEPENDING ON TERMS AND NORMS OF CROPS
06.00.00 Agricultural sciences
DescriptionIn this article, the results of researches of the influ-ence of terms and norms of crops of a winter rape on growth and development of plants, winter hardi-ness and productivity of cultures in the changed environmental conditions of Rostov region are re-sulted
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Description
Today, the Russian agriculture is facing food market saturation task by domestic quality products in sufficient quantities for the needs of the population. At the same time healthy nutriment is provided, according to doctors and scientists, by vegetables, which must be present in the diet of a healthy person. In this regard, a big role is assigned to the covered ground crop production, normal functioning of which allows to supply shops and markets with vegetables throughout the year. For the formation of the necessary environment inside the greenhouse promoting normal plants growth, the main role is played by the solar radiation penetrating into the greenhouse through the transparent enclosure and creating necessary light and temperature and humidity regime. Comparison and analysis of the main cover and light-transmitting materials (film, glass, polycarbonate) characteristics revealed polycarbonate to be the basic material today, light transmitting characteristics study of which this article deals with. As a research method, molecular optical spectroscopy was applied. In order to study there has been selected waveband with their length value from the 610 to 700 nm, which spans exactly the shortwave part of the solar radiation spectrum, which is necessary for the proper implementation of the plants photosynthesis in artificial rearing conditions. After analyzing the measurements results it can be said that studied "KARBOGLASS AGRO" polycarbonate samples, despite the substantially greater thickness in comparison with for example plastic film that is widely used in the old fashioned way, are characterized by higher value of light-transmitting ability for light wavelength values passing through the material - respectively of 79-80,4% and 75,4-77%. Light transmission of "KARBOGLASS AGRO" cellular polycarbonate is at 5 ± 1% higher than of other traditional materials. Among the studied coating materials for covered ground facilities and due to the research results of their light-transmitting capacity, today cellular polycarbonate is of undoubted advantage
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INTERIOR FEATURES OF SPECIALIZED PIG BREEDS
06.00.00 Agricultural sciences
DescriptionThe article gives an assessment of physical and chemical properties of muscle and fatty tissue, biochemical-indices of the blood of the purebred pigs of large white crossing (KB), crossing local mAcurrent, obtained by crossing KB sows with boars of steppe type (ST) CM-1 and three-pedigree animals, obtained by crossing crossbred ewes KB x ST with imported boars of specialized meat breeds such as Landrace (L) Duroc (D) and pietrain (P). We have studied indicators such as : number of protein, fat content, pH acid, moisture content and color intensity of PSE and DFD defects, the intensity of coloration of muscle tissue, the content of tryptophan, held tasting meat and broth, defined by nutritional value and studied the technological properties of subcutaneous fat, the melting point of the fat and iodine number
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ABOUT USING NANOSTRUCTURED OCCLUDING ADDITIVES IN DIETS OF BIRDS
06.00.00 Agricultural sciences
DescriptionThe article investigates feed additives on the basis of natural minerals in combination with biologically active agents (vitamins, organic acids) capable to neutralize mycotoxins, to enrich forages with minerals and vitamins C high biological availability, to improve digestibility of nutrients, to reduce toxicological load of an organism, to increase safety and efficiency, to improve structure and ecological purity of production. The effect from use as a part of compound feed for laying hens of new occluding additives: Ecobentokorm and the vitamin-mineral adsorptive feed additive (VMAFA) promoted increase of indicators: egg efficiency, safety of a livestock, conversion of a forage, morphometric and biochemical parameters of eggs
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THE USE OF FEED COMPLEX PALUTENA P-2 IN THE DIET OF THE AFRICAN BLACK OSTRICH
DescriptionThe article presents a research on the influence of Felucene P-2 on the growth of black African ostriches, as well as on the hematological parameters of the blood of ostriches. For the experiment, two groups of ostriches, aged 2 months, were formed: the first one received a standard diet, the second - the Felucene p-2 feed complex was added to the standard diet. As a result of the conducted research, it was found that Felucene P-2 is an effective feed complex of domestic production, allowing under equal conditions of feeding and maintenance to increase the growth and development of young ostriches. From the age of 120 days, an increase in the average daily increase in the live weight of black African ostriches was recorded, and high growth energy of the bird was observed up to the age of 240 days
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USE SORBING ADDITIVES BASED ON MONTMORILLONITE BIRDSEED
06.00.00 Agricultural sciences
DescriptionIn the article we have developed and studied feed additives in broiler diets based on natural montmorillonite varieties. Biological effect of Ekobentokorm additives due to their mineral composition and adsorption properties because of the big nano-pores and vitamin-mineral adsorption feed additive (WMACD), additionally, the effect has been included in its composition of biologically active substances. Effect of use of Ekobentokorm sorbent additives in feed for broilers and vitamin-mineral adsorption feed additives (WMACD) contributed to the increase of meat productivity, preservation of poultry, eating and feed conversion, the improving the carcasses
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Description
The aim of the article is theoretical and experi¬mental confirmation of the possibility to improve the acceleration performance of tractor units by in¬stalling a tow hitch with variable stiffness. Application of speed tractors in agricultural pro¬duction meets a number of difficulties associated with the unsteady processes, especially while accel¬erating of machine and tractor units. The resulting large inertial loads during acceleration lead to loss of engine power, due to which the machine and tractor unit operates with less performance and economy. Our analysis of published studies shows that the acceleration performance of tractor units is greatly influenced by the rigidity of external links in the form of coupling devices installed between the trac¬tor and the agricultural machine. The design of the tow hitch with variable nonlinear stiffness for class 1.4 tractors is offered. The results of theoretical and experimental studies on the effect of the proposed tow hitch with variable nonlinear stiffness on the acceleration capabilities of machine and tractor units based on class 1.4 tractor are shown. Based on the analysis of characteristics obtained by the analytical and experimental ways, it was proved that the use of the hitch with a variable non-linear stiffness on class 1.4 tractor helps to improve the acceleration performance of the machine and tractor unit