ВЛИЯНИЕ ЛЕСНЫХ ПОЖАРОВ НА ФОРМИРОВАНИЕ ПРОФИЛЯ ПОДЗОЛОВ

In recent years, the number and intensity of forest fires has increased and thus more attention is paid to studying the pyrogenic soils. Parameters under study include, the post-fire return of phosphorus, alkali and alkaline earth metals, etc. from burnt plants and forest floor to the soil, but the related dynamics of iron and aluminum compounds has been poorly studied. However, these two elements are crucial for soil-forming processes and the productivity of many soils, in particular of the podzols under the most fire-hazardous pine forests in dry habitats. The present analysis comparative geographic is based on literature and original data related to podzols on quartz sand, in which the eluvial-illuvial distribution of sesquioxide compounds along its profile is one of important diagnostic features. An increase in the frequency of forest fires disrupts the bio-pedogenic accumulation of R2O3 in podzol profile. It is suggested that sorption on charcoal and detritus does not compensate for the removal of iron and aluminum from the podzol profile. The problems of taxonomy of post-pyrogenic soils are discussed.