Fig. 2.

Relationships between atmospheric N deposition and activity of phosphatase, β-glucosidase, and chitinase at the end of incubation. A positive relationship was found for phosphatase (y = 4.1 + 7.5x, R² = 0.91, P < 0.01; n = 12) and β-glucosidase (y = 2.0 + 1.3x, R² = 0.81, P < 0.01; n = 12), whereas a negative relationship was found for chitinase [y = 1.7 − 0.1ln(x), R² = 0.50, P = 0.01; n = 12]. Values are means of three to six litter peat samples for each bog (SE was <15% of the corresponding mean value).