The role of fungi and bacteria in the mineralization of nitrogen compounds in the ecosystems of the Southern Taiga of European Russia

For two years, the contribution of fungi and bacteria to the process of net ammonification in the soddy-podzolic soil of the sorrel-blueberry birch forest of the Yaroslavl region was determined using inhibitory analysis. Established, that the litter is characterized by an equal participation of fungi and bacteria in this process. In the humus horizon, a slight excess of fungi over bacteria was noted in a year of normal moisture and a clear dominance of fungi in a dry year. In the eluvial part of the profile, a close contribution of these groups was noted, with an insignificant prevalence of one of them over the years of study. The maximum air temperature is able to change the seasonal dynamics of the abundance of saprotrophic fungi in the soil and to some extent form the generic structure of the mycobiota in the horizons of the soil profile of the birch forest.