Determination of the Proportion of Total Soil Extracellular Acid Phosphomonoesterase (E.C. 3.1.3.2) Activity Represented by Roots in the Soil of Different Forest Ecosystems

Table 1

Total Root Mass and EAPM Activity of Roots in Seven Forest Stands (Mean ± SE). Different Letters Mark Significant Differences (𝑃<0.05).

Forest	g fresh roots	mg p-NP g^−1 fresh roots h^−1
Young beech	3.98 ± 0.85^a	0.27 ± 0.03^a
Old beech	6.79 ± 1.10^ab	0.17 ± 0.03^a
Young oak	7.49 ± 1.27^bc	0.26 ± 0.02^a
Old oak	9.77 ± 1.00^cd	0.27 ± 0.02^a
Young spruce	4.18 ± 0.52^ae	1.18 ± 0.10^b
Middle-aged spruce	6.95 ± 0.86^bde	0.58 ± 0.08^c
Old spruce	4.02 ± 1.11^a	0.81 ± 0.13^d