Fate of nitrogen compounds deposited to spruce (Picea abies Karst.) and pine (Pinus silvestris L.) forests located in different air pollution and climatic conditions
T. Staszewski et al., Fate of nitrogen compounds deposited to spruce (Picea abies Karst.) and pine (Pinus silvestris L.) forests located in different air pollution and climatic conditions, WATER A S P, 116(1-2), 1999, pp. 121-127
Measurements were made of NO3-N and NH4-N in bulk deposition, throughfall a
nd soil solution on six permanent plots in pine and spruce stands located a
long a transect from the south to the north of Poland. Location differed bo
th in the level of air pollution level and in climatic parameters. The tota
l N load calculated from throughfall ranged from 12.5 to 34 kg(-1)a(-1). Th
e load of NH4-N exceeded the NO3-N contribution. Differences in total N loa
d were not reflected in foliar N concentration. Present forest health statu
s of stands determined by defoliation class, and do not appear to be relate
d to their N deposition.