TRAMPLING DOWN EFFECT ON MACROMYCETES FRU CTIFICATIONS IN HERBS BIRCHFORESTS .1. YIELDS AND BIOMASS OF MACROMYCETES MYCELIA

Effects of recreation activities on fructification of macromycetes and development of soil mycelium has been investigated. Our results show that the trampling down experiments during the main period fructificat ion of mushrooms decreases their yield about twice during the first ye ar. In the following two years the yield of the macromycetes on the ex perimental plot was 77-82 % higher that one at the control plot, Howev er, simultaneously mycelia biomass in humus soil horizont was lower in the experimental plot comparing to control.