Impact of endemic calciphilous flora of the Central Russian Upland on the nitrogen regime of carbonate soils and sub-soils

Abstract

The study was conducted in order to examine the nitrogen status of soils and sub-soils under endemic calciphilous species: Matthiola fragrans Bunge, Hyssopus cretaceus Dubjan and Andorsace koso-poljanskii Ovcz. The research tasks included a comparative analysis of the dynamic changes in the content of organic m atter carbon, total nitrogen, easily hydrolysable nitrogen, nitrate nitrogen, and nitrification capacity of soils and sub-soils in the course of vital processes of the species under study