Features of the transformation of soils under the influence of fires in the pine forests of the Baikal region

The signs of macro-, micro- and submicromorphological structure and properties of psammozemes of humus and their successions were studied. The formation of a profile of background soils is determined by the formation of litter and weakly expressed humus- accumulative and alfa-humus processes. For 15 years of development after the ground fire, the charred litter and coals in the humus horizon have been preserved in the soil. The feature of soil development after a grassroots fire is an increase in the content and reserves of humus. A large amount of carbonaceous substances has caused the preservation of a weakly acid reaction of the medium and an increased content of exchangeable calcium. After top fires the carbonaceous substances in the soil are kept low, the soil is underdeveloped and differs by acidic reaction, low reserves of humus.