INFLUENCE OF TEMPERATURE AND SUPPLY OF MINERAL NUTRIENTS ON CELLULASEACTIVITY AND MICROMYCETE DEVELOPMENT IN SAMPLES OF FEAT FROM A RAISEDBOG

Cellulase activity (CA) was determined and succession of micromycetes was studied in samples of peat from a raised bog. The effect of minera l supply (N, P, K, S) and temperature (25 and 38 degrees C) was studie d. The lowest CA and the highest diversity of micromycetes were reveal ed without the addition of nutrients at a temperature of 25 degrees C. A temperature rise to 38 degrees C and addition of mineral nutrients resulted in an increase of CA and a decrease and alteration of micromy cete diversity. Determination of cellulase activity at different conce ntrations of mineral nutrients (50, 250, and 1000 mg N/kg) at a temper ature of 38 degrees C showed that the maximum CA value was the same in all variants; the most prolonged stimulation of CA was registered at a mineral salt concentration of 1000 mg N/kg. Addition of Cu and Zn pr oduced a slight stimulating effect on CA, which increased 1.5 times in comparison with the control.