Dynamics of Phosphorus and Potassium Content in Chernozem Soils of the Samara Agrarian Carbon Polygon
Year: 2023
Type: article
Abstract: The purpose of the research is to assess changes in the content of mobile forms of potassium and phosphorus in soils for subse-quent monitoring and identification of features affecting the soil fertility of chernozem soils of the central agroclimatic zone of the Samara region. During the research, the collection of soil survey data for 1992 and 2002 was carried out, the collected material was analyzed, in 2022, a survey of agricultural lands was carried out and 54 samples were selected for analysis from 9 pits (0,90-1,0 m deep), 5 semi-pits (0,60-0,65 m deep), 1 trench. The change in the content of mobile phosphorus and exchangeable potassium in soils in the territory of the agricultural carbon polygon was studied. According to the results of the study, an increase in the content of mobile phosphorus in 2022 in most soils can be noted compared to the surveys of 1992 and 2002 by an average of 27-198%. The greatest increase was noted on ordinary residual meadow medium-humus medium-deep medium-loamy chernozem. For the period 1992-2002, the soils were characterized by a high and very high degree of potassium supply, with the exception of meadow-chernozem carbonate medium-humus medium-deep heavy loamy, which belongs to the average level of mobile potassium supply. In 2022, in most of the studied soils, changes occurred towards a decrease in the content of mobile potassium over a 20-30 year period by an average of 18-95%. With the exception of meadow-chernozem carbonate medium-humus medium-deep heavy loamy soil, where an increase in the amount of potassium by 16% was revealed according to the state of 2002. In this regard, most soils for the period 2002-2022 were characterized by medium and low potassium supply.
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDGs: Zero hunger, Life on land
Open Access status: hybrid
OpenAlex ID: W4409703718