Effect of fertilization on the abundance of bryophytes in two drained peatland forests in Eastern Finland

摘要: The short-term effects of fertilizer application were studied on a drained herb-rich sedge birch-pine swamp and Vaccinium myrtillus spruce treated with: (1) PK: apatite + biotite, (2) superphosphate potassium salt K 60, (3) NPK: urea (4) nitroform (5) NPK micronutrient mixture: biotite mixture, (6) wood ash. Both sites (62°51'N, 30°53'E) for forestry purposes in the 1930s they redrained fertilized at beginning this study (1979-1980). At both sites, coverage ground layer decreased immediately after fertilization reditching. Rapidly soluble PK mixture chiefly reduced production/biomass ratio (P/B) forest bryophytes, e.g. Pleurozium schreberi, Hylocomium splendens Dicranum spp. rapidly had more destructive effect peat mosses (e.g. Sphagnum girgensohnii, S. angustifolium) than mosses. (urea) Polytrichum commune, but not P/B live phytomass. "Burning" occurred bryophyte stands that came into direct contact with fertilizer. Stands less benefited from their creased. DCA ordination appeared to be well suited identifying most important gradients population structure sample plots. diversity indices (Shannon H' Kempton & Taylor Q) behaved different ways: index suit commu nities these areas, because material contained dominant spe cies one hand fairly large number species low cover ages other.