In situ net mineralization rates in a heterogeneous mixed deciduous forest receiving elevated n deposition.
In situ net mineralization was studied at 6 locations (E, Eb, Ec, F1, F2, F3) of a heterogeneous mixed deciduous forest ("De Gulkeputten") with oak (Quercus robur L., Quercus rubra) and birch (Betula pendula) as dominant species. Net nitrogen mineralization was determined by means of a sequential in situ incubation experiment using intact soil cores. For all incubations, the net mineralization rates of the organic (F+H) layer varied between -0.4 and 2.0 g N m(-2) month(-1), while the net nitrification rates varied between -0.6 and 0.7 g NO3- -N m(-2) month(-1). The net mineralization and nitrification rates of the mineral (0-30 cm) layer ranged from 4.5 g N m(-2) month(-1)to 8.8 g N m(-2) month(-1)and from -1.0 to 4.9 g NO3- -N m(-2) month(-1) respectively. In general, net mineralization rates increased from August 1998 to October 1998. Net mineralization rates were positively correlated with the gravimetrical moisture content and mineralization and nitrification rates were mutually positively correlated.
Vervaet
H
H
Department of Applied Analytical and Physical Chemistry, Faculty of Agricultural and Applied Biological Sciences, Ghent University, Coupure 653, B 9000 Ghent, Belgium.
Boeckx
P
P
Van Cleemput
O
O
Hofman
G
G
D029662:Betula / Q000378:metabolism*; D004784:Environmental Monitoring / Q000379:methods; D006863:Hydrogen-Ion Concentration; D009584:Nitrogen / Q000378:metabolism*; D010084:Oxidation-Reduction; D029963:Quercus / Q000378:metabolism*; D012987:Soil / Q000032:analysis*; D014197:Trees
D012987:Soil; D009584:Nitrogen