Abstract
In this work, changes in the composition and properties of alluvial meadow-boggy soils are considered, with prolonged use in rice crop rotation and not involved in agricultural production - a virgin plot. The morphological differences of meadow-boggy soils of a rice field from a virgin area were revealed, which subsequently determine the properties of the soil cover of the Kuban River delta. The regularities of the interdependence of the granulometric composition of the soil, which lie in the mineralogical composition of alluvial soils and rocks, have been revealed. The tendency of an increase in soil density with an increase in the content of physical clay and silt, as well as an increase in the density of the solid phase of soils, has been established. No significant differences were found in the indices of the agrophysical properties of the subsurface horizons of soils and underlying sediments. The assessment of fertility indicators of meadow-boggy soil of a rice field and virgin analogue is given. Hydromorphic soil-forming processes have led to a significant change in the properties of alluvial deposits and soils involved in the rice crop rotation.
Highlights
This work is the result of studies of the composition and properties of soils in rice crop rotations
During the formation of the soil cover on the described territory, geomorphological and relief conditions are decisive for such factors of soil formation as parent rocks and moisture conditions
The main indicators of the properties and granulometric composition of the alluvial meadowboggy soils of the rice agrocenosis differ from the virgin area, this difference depends on the anthropogenic impact
Summary
This work is the result of studies of the composition and properties of soils in rice crop rotations At present, it is not known how far the transformation of the properties of the former rainfed soils, used in rice crop rotations, has gone. It is not known how far the transformation of the properties of the former rainfed soils, used in rice crop rotations, has gone This raises questions of developing methods for restoring the properties and fertility of soils in rice fields [1, 3]. In this region, the characteristics of soil-forming rocks and soil cover of rice systems are primarily dependent on geomorphology and relief. The absolute marks of the terrain vary from 2–4 m to zero and even negative marks [6, 7]
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