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Dynamics of change of physical and chemical composition of water, centralized sources of water supply of the republic of Kalmykia

Published in «Water: chemistry and ecology» № / 2019 , p. 52-59.
Heading:

 

Hochaeva S.S.

Summary:
The article discusses the current state of the chemical composition of the soils of the Kharbinsky federal reserve, located on the territory of the Yustinsky and Yashkulsky districts of the Republic of Kalmykia. The predominant soil composition of the reserve is represented by the complexes of brown semi-desert soils with saline and sand. These soils are highly susceptible to erosion, mainly of wind type. The main reasons are the light mechanical composition of soils, land use and arid climate. The latter conduces to vegetation of only sparse semi-desert grass, which is not able to create dense turf.
Following analyzes were carried out in order to provide general soil characteristics: analysis of water extraction (soils were analyzed for presence of Ca2 +, Mg2 + and Na + cations, HCO3-, CI- and SO42- anions as well as pH), analysis for nitrogen, phosphorus and potassium, and analysis for heavy metals.
The chemical analysis shows that the soils of the settlements territories are more saline than the steppe ones. The analyzed soils contain little humus, the percentage varies from 0,37 to 4,66 %. The nitrogen content in the reserve’s soil varies from 24,5 to 64,8 mg / 1000 g. The content of mobile phosphorus in the analyzed soils varies over in a wide range from 14,0 to 150,0 mg / 1000 g. The analyzed soils are poorly supplied with exchangeable potassium, The content of latter varies from 0,12 to 1,17 mg / 1000 g.
The study shows that agricultural activities make the chemical composition of soils change. If the type and degree of salinization changes, there is change in the macroelement composition of soils and we can note the increase of content of heavy metals.

Keywords: chemical properties, Federal Reserve, soil cover, the Republic of Kalmykia

Bibliographic link:
Hochaeva S.S. Dynamics of change of physical and chemical composition of water, centralized sources of water supply of the republic of Kalmykia // Water: chemistry and ecology. — 2019. — № . — c. 52-59. — http://watchemec.ru/en/article/29786/

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