Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 307662
Title Effects of ammonia deposition on forests in the Netherlands
Author(s) Eerden, L. van der; Vries, W. de; Dobben, H.F. van
Source Atmospheric Environment 32 (1998)3. - ISSN 1352-2310 - p. 525 - 532.
Department(s) Institute for Forestry and Nature Research
Winand Staring Centre for Integrated Land, Soil and Water Research
Publication type Refereed Article in a scientific journal
Publication year 1998
Abstract With 40 kg N ha-1 yr-1 the Netherlands is the country with the highest nitrogen deposition in Europe. Approximately 2/3 of the nitrogen deposition is from NH(x). Considering defoliation and discoloration of the foliage, tree vitality of Dutch forest is poor, and declining for some tree species. Nevertheless the wood production is normal or relatively high, except in highly polluted regions. At many locations the N status of the foliage and the Al3 /Ca2 and NH4 /K in the soil solution exceed assumed critical levels. But these exceedances are not well correlated with the loss and color of foliage. From laboratory experiments it is evident that these exceedances cause enhanced risk for damage by biotic and abiotic stresses, but only few indications exist that this has a severe impact on tree growth in Dutch forests. In contrast, the species composition of the undergrowth has been changed drastically, from a lichen dominated to a grass-dominated vegetation. Prediction of the future performance of the forest is complicated by several crucial gaps in knowledge. One is that the relation between nitrogen deposition and risks for damage by secondary stresses is still poorly validated in the field situation, and another is that the assumption in the critical load concept of a similarity in effects of the different forms of nitrogen deposition may be wrong.
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