South Federal University
Author list of organization
List of articles written by the authors of the organization
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BIO-DIAGNOSTICS OF RESISTANCE OF GREY FOREST SOILS OF ADYGEA TO POLLUTION WITH Zn, Cd, Mo, Se
DescriptionThe essential part of a soil cover of the Republic of Adygea is occupied by gray forest soils. Thus they still remain a little studied, including concerning their resistance to chemical pollution. Contamination of gray forest soils of Adygea with Zn, Cd, Mo, Se causes deterioration of their biological properties. In most cases, the degree of reduction of the values of biological indicators is directly dependent on the concentration of pollutant in the soil. According to the degree of toxicity to the biological properties of the investigated elements form the following sequence: Se > Zn > = Cd > Mo. Biological parameters investigated in research (activity of catalase and dehydrogenase, cellulolytic ability, abundance of bacteria of the genus Azotobacter, radish root length) may be used for purposes of monitoring, diagnosis and regulation of chemical pollution of gray forest soils Zn, Cd, Mo, Se
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Description
This article presents an assessment of the stability of the black soil of the Crimea to contamination with heavy metals (Pb, Cu, Cr, Ni) and oil using biological indicators
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Description
The article deals with the study of the influence of the elastic damping mechanism (EDM) on the operability index for arable MTU on the basis of the 1,4 class tractor. The elastic damping mechanism was designed in order to smooth the aggregate starting, to reduce the dynamic load in transmission, to protect the engine from the external load vibration. The experimental results that were obtained while full-scale field studies of serial and test (containing EDM in transmission) machines are given in the article. Various oscillograms are analyzed: torque on the axis of tractor's driving wheel, tractive effort, the speed of the driving wheel, angular velocity of engine shaft and haulage. The mass-spectrum analysis was carried out to study the tractor characteristics in time more thoroughly. Such analysis allows to evaluate qualitatively the EDM influence. The normalized autocorrelation function and spectrum density of variation in time are studied in details for the following MTU characteristics: the wheel torque, haulage and tractive effort. These characteristics were compared with analogous characteristics for serial MTU model. The obtained results confirm that the EDM use in the tractor transmission has a positive effect on the functional MTU indexes. Obtained data can be used in mathematical modeling of MTU functioning
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Description
Green building, forestry, agriculture of the Rostov region is in desperate need of resistant and long-lived samples of deciduous trees of the first grade. The main object of the search of promising forms of deciduous trees were artificial plantations of Quercus robur in the Botanical Garden of SFU. The research identified several of samples of Quercus robur, which are of economic interest. Based on ecological and biological properties and economic qualities, the most promising on was a sample of Quercus robur var. tardiflora, planted in 1888. This sample is less receptive to pests and diseases. It also has a high winter hardiness and drought resistance and significantly superior to similar samples of Quercus robur along longevity and has a high decorative effect. Dedicated sample of Quercus robur var. tardiflora, and his generation from seed is very different from other samples of the population by time of phenological phases. The all main henological phases of this sample occured later by on 10-15 days. The sample belongs to the group of plants of late phenological dates start and end of the growing season. The phenology of dedicated samples contributes to their high steadiness into regional climate. It propagates by sowing freshly harvested seeds. Phenological features of the selected sample might be inherited in the seminal generations
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CHANGES IN BIOLOGICAL PROPERTIES OF ORDINARY BLACK SOILS AT GLEYISATION (MODEL EXPERIMENT)
DescriptionThe article presents the results of laboratory modeling of gleyisation and its effect on the biological properties of soils with stagnant regime in ordinary black soils. Gleyisation is a complex biochemical process that occurs under oxygen reduction conditions. Anaerobic microorganisms, the presence of organic substances, and the constant or prolonged waterlogging of individual horizons or the entire soil profile promote gleyisation. Model experiments revealed that gleyisation increase the total number of bacteria and suppresses number of actinomycetes, micromycetes and growth of fungal mycelium. Gleyisation decreases the activity of oxidoreductases and increases the hydrolases activity. In addition, the second content of humus slightly increases and active acidity (pH) changes to neutral. Accumulation of large amounts of iron oxide (II) in soil is revealed
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Description
We have investigated the influence of nickel oxide in the amount 100, 1000 mg/kg of the soil (1, 10 MPC), combined with the influence of variation magnetic field with induction of 50, 100 and 650 μT power frequency of 50 Hz on the enzyme activity and phytotoxity of the southern chernozem. We have established significant reduction of enzyme activity of catalase and length of roots after the influence of the variation of magnetic fields. Pollution by nickel as an independent factor caused stimulation of enzyme activity of a dehydrogenaze and length of roots of radish. The greatest inhibition of the activity of all indicators was observed at joint influence of magnetic fields and pollution by nickel of concentration of 1 maximum permissible concentration (1 MPC). Enzyme activity of dehydrogenaze was significantly stimulated (p
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Description
In this article, we have presented a number of modeling experiments to investigate the chemical pollution of brown calcareous soil. It assesses the stability of brown calcareous soil of a nature reserve called Utrish to contamination with heavy metals in biological parameters. Pollution of brown calcareous soil with Cr, Cu, Ni, Pb and oil causes a significant reduction in biological parameters. The degree of reduction depends on the nature of the contaminant and its concentration in the soil. The study showed that the indicators used in the biological condition of the soil, could be recommended for use for diagnosis, monitoring, and regulation of chemical pollution of brown soil. According to the degree of resistance to chemical contamination, the brown soils of Russia form the following series: typical brown - brown carbonate - brown leached
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Description
In the article we have investigated the influence of nickel oxide in the amount of 100, 1000 mg/kg of the soil (1, 10 MPC), combined with the influence of an alternating magnetic field of induction of 50, 100 and 650 µT power frequency of 50 Hz on the biological properties of alkalinity black soil
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CHANGES IN ORDINARY CARBONATE CHERNOZEM CONDITIONS CONSIDERING MODERN HYDROMORPHISM
DescriptionThere are changes in almost all the properties of chernozems under locally overmoistening. In general, changes in the properties and conditions of chernozems under the development of local wetlands went in a particular way, regardless of the peculiarities of soil formation factors and causes waterlogging. The most noticeable change is the transformation of physical properties of soil and organic matter status. According to our research, more quickly and clearly excessive moisture causes a change in the physical properties of the soil. There are changes of the structural state, bulk density and amount of water-stable aggregates. The significant change is the transformation of soil organic matter. There is increasing of total humus content. In a group composition, the fraction of humic and fulvic acids increases the share. The humus profile is stretched. In the majority of cases in investigated soils was diagnosed secondary salinization. The periodic waterlogging of the soil also contributes to the change in the amount of soil carbonates and their distribution in the profile. Chernozems gradually lose calcium, the main structurant and humates maker. Among the most studied soil of Zernogradsky region in the cationic part of the prevailing spot goes sodium. In addition, the narrowing ratio of calcium to magnesium was observed. That is the hallmark of the aqueous extract of locally overmoistening soils
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Description
Quoted results of development and realization on practice of tools and mechanism of supplement training system, retraining and extension course for qualified personnel of enterprises and organizations focused on innovation- economy. The article may be useful for economists and other professionals interested in the formation and development of company and staff competencies