Complementary N Uptake Strategies between Tree Species in Tropical Rainforest
Table 2
Denitrification, nitrification, and nitrate content in soils and litters.
Soil DEA ng N-N2O/g/h
Litter DEA ng N-N2O/g/h
Soil NEA ng N-NO3/g/h
Litter NEA ng N-NO3/g/h
Soil g N-/g
Volcanic-plutonic domain
Dicorynia guianensis
15
225.04 (65.54)
38.26 (12.56)
0.00 (0.00)
22.86 (16.19)
3.68 (0.81)
Eperua falcata
17
247.13 (75.68)
65.41 (14.51)
0.00 (0.00)
28.81 (18.69)
3.03 (0.94)
Mean
32
234.50 (44.19)
49.89
0.00 (0.00)
25.41 (13.74)
3.40 (0.53)
Schist domain
Dicorynia guianensis
15
213.32 (50.74)
15.52 (3.63)
0.00 (0.00)
23.96 (18.07)
2.04 (0.59)
Eperua falcata
17
236.47 (52.65)
20.75 (3.77)
0.00 (0.00)
25.58 (18.75)
2.30 (0.61)
Mean
32
224.46 (38.97)
18.03
0.00 (0.00)
24.77 (12.12)
2.16 (0.47)
Denitrification enzyme activity (DEA, ng of N-N2O/g/h), nitrification enzyme activity (NEA, ng of N-/g/h) in soils and litters, and content (g N-/g soil) in soils beneath Dicorynia guianensis and Eperua falcata in rainforest developed on two geomorphologic domains (schist domain and volcanic-plutonic domain) in French Guiana (means ± SE). *Differences between means are significant at .
