Name
Koshchayev Andrey Georgiyevich
Scholastic degree
•
Academic rank
professor
Honorary rank
—
Organization, job position
Kuban State Agrarian University
Web site url
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Articles count: 41
The article covers the study of the influence of sodium hypochlorite different concentrations on the quail organism in various schemes of its application
The article provides an overview of materials of conferences on problems and prospects of the industry of cattle breeding
A method of obtaining insertion mutants for the hoc
gene, which encodes for the main phage antigen, was
developed on the model of bacteriophage T4. This gene
was cloned in the plasmid pBSL0+ and was disrupted
by insertion of foreign DNA. The phage mutants were
obtained by in vivo phage-plasmid recombination. The
construction of insertion bacteriophage mutants was
carried out in two stages. The resulting mutants on this
procedure could be grown on wild-type E. coli strains,
which is convenient for the production and use of these
phages in therapy. The mutants obtained had reduced
antigenicity. At the same time, the yield of the mutant
strains was high when they were grown on the
non-suppressor E. coli laboratory strains. A number of
stages of purification of the bacteriophage mutants
obtained were performed. Preparations have been
studied by transmission electron microscopy and mass
spectrometry. By several periodic cultivations of the
mutant bacteriophages, it was shown that mutations of
this type are stably maintained during more than 50
generations. T4 related bacteriophages of the family
Myoviridae, for example, T-even, have the significant
homology amongst their genomes, which makes
possible to produce similar mutants. Thus, our method
was developed to obtain mutants with reduced
antigenicity which can be used for both the treatment of
systemic infections, and diarrhea in the case, when,
bacteriophages penetrate into the bloodstream. Such
phages can be used in medicine and veterinary. The
reported study was partially supported by RFBR,
research projects No. 13-04-00991, 16-44-230855
This review contains the information about the role of annelids in maintaining soil fertility. Recommendations based on authors’ experience and scientific literature are given for vermicultivation,
biomass use of Californian worms in animal husbandry and vermicompost use in crop production. Furthermore, detailed description of the methods of cultivation of worms is given
The article is concerned with the use of functional feed additives from pumpkin fruits and alfalfa juice for the poultry industry. In the study of laying hen it has been found that the use of a feed additive in-creased pumpkin paste content in serum and egg yolk carotenoids is more than two times, and the concentration of vitamin A in these tissues increased slightly, not exceeding 20%. Livability and productivity of poultry increased and average expendable fodder per head per day decreased. Economic calculation showed that the use of pumpkin paste reduces the cost of production of eggs. The use of alfalfa juice coagulates in diets for broiler chickens resulted in an increase in the concentration of carotene in the liver by 22,7-46,8% relative to control. The juice addition also increased the content of vitamin A in the liver by 27.9%, increase the safety and efficiency of the bird. The authors draw certain conclusions from experiment results that the use of functional additives in poultry from the fruit of pumpkin and alfalfa juice is an alternative to synthetic vitamin preparations and produce a more environmentally friendly products
The article provides an overview of the results of experimental works of the authors on the use of different methods of fractionation of Lucerne juice to obtain feed additives
The 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
During the research, we have developed a low-temperature zonal heating panels with an infrared emitter to create a local microclimate for piglets in the suckling period. This heater is lightweight and durable frame in the form of an inverted box size 400 mm x 1800 mm, attached to the wall of the building swivel. Top frame mounted thermostat is connected to a temperature sensor mounted directly on a metal plate with a thickness of 1 mm, painted in black color. In the upper part of the inner carcass layer is a light insulating material, which is located directly under the low-temperature heat source is electric. Study of the optimal size of the heating panel revealed that in view of the limitations associated with the area of the machine and biological characteristics of the optimum size of the sow for 11 piglets are: width – 400 mm; length – 1500 mm (at ventral position) and 1800 mm (lateral position). Comparison of different heating sources for piglets revealed that the use of infrared lamps enables newborn piglets seating area by 55.6%, while in 28 days – by 88.9%. Infrared lamps can not completely meet the recommended specifications as to ensure a more intense heat lamp to be lowered towards the floor surface, which leads to a reduction in the useful area heated. Using as a source of local heating mats and low-temperature panels satisfies pigs in the area of the den in the early suckling period at 138.9 and 200.0%, to weaning, respectively – by 48.5 and 65.5%. Thus, we have developed a low-temperature heating panels contributed to a more uniform distribution of heat in a recreation area of suckling piglets and to provide a comfortable environment at temperatures of 2-3 C lower in comparison with other methods of heating
During the study of different methods of fractiona-tion of alfalfa juice it was established that the most effective preservative of Lucerne juice is a composi-tion containing 2% of stock culture of lactic acid bacteria, 2% of molasses and 0.3% of benzoic acid, which preserves the functional properties of protein-vitamin feed additive
Carotenoid preparations are quite widely used in a health care, but in the veterinary and animal husbandry, their use is limited. In terms of livestock farms of the Krasnodar region and the Rostov region at the biochemical monitoring studies of the cattle blood the lack of carotene in the serum is revealed from 45 to 100 % of the samples. To study the biological function of carotenoid we used preparations, which are the oily solutions for injections: β-carotene (manufactured by FS 42-3867, which is produced from the biomass culture of the fungus Blakeslea trispora) and lycopene, emitted from plants. The cows in the test groups during the dry period and within two weeks after birth got carotenoid preparation subcutaneously at a dose of 10 ml per animal with an interval of 7 days. As a result, it was found out that the application of carotenoids has the most favorable conditions for the flow of labor and the postnatal period, which are manifested in the decrease in obstetric and gynecological diseases in cows and reduce the period of infertility. In the experimental groups the levels of vitamin A and carotene1,3 times higher (1,26 ± 0,14 μmol/L vs. 0,97 ± 0,09 μmol/L ) 1,8 times (0,34 ± 0 03 mg /% vs. 0.61 ± 0.11 mg /%) respectively in comparison with the parameters of the intact animals at a high level of confidence (P < 0,05). Phagocytic number and percentage of digestion of neutrophils increased by 8,5 %, the difference in the number of B-cells reached 9,1%, T-cells – 6,7%. In a humoral immunity found a significant increase in Ig A. After comparison of the level of lysozyme activity of blood serum was observed its reduction in all animals immediately after birth, but in the experimental groups this process was less pronounced. The use of carotene preparations helps to reduce the concentration of lipid peroxidation products in the body of cows (diene conjugates - by 16,6 %, ketodienes - by 35,7 %, malondialdehyde – by 11,3 %), which creates favorable conditions for the flow of the metabolic processes associated with ensuring the normal childbirth and post-partum involution of the genitals. In the group of cows, receiving the carotenoid lycopene, the dyspepsia morbidity of the newborn calves compared to a control decreased by 26,7 %, bronchopneumonia - by 13,3 %