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2018, N 2 (32) |
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ECOLOGY
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Uskova N., Chernikov V., Belopukhov S. |
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Agroecological estimation of humus condition of sod-podzolic soil by means of derivatographic analysis method |
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Now there is an active anthropogenic influence in the soil-forming process, which implies a change in the qualitative composition of humus substances. Therefore, it would be wrong to reduce all research only to the accumulation of organic matter, it is also important to conduct a study of its qualitative composition. Rather informative in this field of research are the derivatographic methods of analysis based on thermal destruction of the test sample and conditional release of the сentral and peripheral parts of humus substances on the ability of destruction in low - and high-temperature range. The ratio of shares of these parts can serve as an important indicator of the stability of the structure of soil organic matter. A study was conducted of the influence of long application of various systems of fertilizers on the quantitative and qualitative composition of humus, namely, by the method of thermal analysis, it was determined the number of components in the сentral and peripheral parts of the organic matter by their ability to degradation in low and high temperature range. It was found that for options with permanent potato cultivation lime increases the destruction temperature of the peripheral part, but, at the same time, the number of components and the strength of the сentral part is lower than in the variants without lime. For winter rye reverse regularity is observed. Liming contributes to the accumulation of more hygroscopic water in the soil. The organic matter content determined by the thermographic method is higher than that determined by the Tyurin’s method in the CINAO modification and is more accurate for determining the organic matter content in the soil.
Keywords: THERMOGRAPHIC METHOD OF RESEARCH, SOD-PODZOLIC SOIL, LONG-TERM FIELD EXPERIENCE, QUALITATIVE COMPOSITION OF HUMUS, ACTIVATION ENERGY |