Structural organization of forest floor under stationary bulk lysimeters of Soil Science Faculty of Lomonosov Moscow State University

Abstract

The typology and total reserves of mortmass concentrated in the forest fl oor of the main types of biogeocenoses developing within the stationary bulk lysimeters of the soil station of Lomonosov Moscow State University have been studied. It is shown that mainly destructive floor develops in spruce forests, fermentative floor is formed in mixed stands, while humifi ed floor is formed in broad-leaved stands. An interbiogeocenotic litter exchange has been established, in which foliage is found in spruce biogeocenoses, overgrown fallows and in fallow conditions.
Calculation of floor-litter coeffi cients according to N.I. Bazilevich made it possible to characterize the type of circulation in spruce plantations as inhibited — floor-litter coeffi cient (LOC) 2,8 — , which is due to the predominant participation of needles, resistant to decomposition. In broad-leaved and mixed plantations, an intensive type of
cycling was established with an SAR of 1,2. It has been shown that when calculating the total reserves of organic matter in the litter, the content of mineral impurities should be taken into account, the proportion of which should
be estimated in the course of laboratory studies.