Anthropogenic impact on grain-size distribution and agrophysical properties of soils of cultivated rice lands of Kuban

A.V Osipov,I.I Suminski,V.N Slyusarev,V.P Vlasenko,R.Z Abdulkhalikov

doi:10.1051/e3sconf/202126203006

Abstract

This work reviews the relation of the grain-size distribution and impact of the use of rice rotation soils on the main agrophysical indicators of soils that determine the composition and properties of soil cover of modern delta of Kuban. The regularities of dependence between the density of the matrix soil and the grain-size distribution that consist of mineral composition of alluvial soils and rocks have been identified. The trend towards increase in soil density with increase in physical clay and silt content, as well as increase in matrix soil density has been established. No significant differences in agrophysical properties of subsurface soil horizons and underlying formations have been identified. The agrophysical indicators of soils of rice fields and boharic analogues during their agricultural use have been assessed. The hydromorphic soil-forming processes did not lead to considerable changes in agrophysical properties of alluvial formations and soils involved in rice rotation.

Highlights

This work is a result of many-year research of agrophysical properties of rice rotation soils
Three massifs of the rice irrigation systems arranged on the first terrace above floodplain, ancient delta and modern delta of Kuban river occupying more than 75% of total area of the rice systems that makes about 150 ths. ha are distinguished in the lower reach of Kuban river [1,3]
Considering that the prevailing area of soils involved in rice rotation of the lower reach of Kuban river are located in the modern delta, the agrophysical properties of soils were studied for this geomorphological region

Summary

Introduction

This work is a result of many-year research of agrophysical properties of rice rotation soils. The need in such research is dictated by demands of the agricultural practice. Today it is not known how far are the conversion processes of agrophysical properties of former boharic soils that are currently used in rice rotation. Ha are distinguished in the lower reach of Kuban river [1,3]. In this region, the characteristics of the parent rock materials and the soil cover of the rice systems are primarily dependent on geomorphology and relief Three massifs of the rice irrigation systems arranged on the first terrace above floodplain, ancient delta and modern delta of Kuban river occupying more than 75% of total area of the rice systems that makes about 150 ths. ha are distinguished in the lower reach of Kuban river [1,3].

Methods

Results

Conclusion