THE CAPACITY FOR FOREST PRODUCTION OF SOD-PODZOLIC SOILS IN EASTERN AND CENTRAL POLISSYA

Abstract

A comparative analysis of forest fertility of sod-podzolic soils on glaciofluvial and glacial sands under pine forests was carried out in the different subzones of the Forest zone of Ukraine – Eastern and Central Polissya. It was proved that the overall level of fertility of sod-podzolic soils of Eastern Polissya has increased in comparison with Central Polissya. Growth of soil fertility was caused by increase the proportion of fine sand and clay particles, as well as by increase the content of total phosphorus and potassium. Acidity and nitrogen content in the soil of subzones was virtually unchanged. The humus content was a little greater in the soils of Central Polissya. We analyzed the change of the productivity of pine forests, depending on the level of soil fertility. The increase of soil fertility in Eastern Polsssya becomes the cause of increased productivity of pine forests. This increases the proportion of pine stands with high productivity (II bonitet and higher) and a decrease in the proportion of trees with low productivity (III bonitet and lower).