By G. J. Heij, T. Schneider
This publication comprises the consequences and conclusions of in depth learn at the reasons and results of acidification of forests/forest soils and heathland within the Netherlands. In 1985 the Dutch precedence Programme on Acidification used to be began with the intention to supply a extra concrete shape to the expanding curiosity of policy-makers within the results of pollution on ecosystems specifically. within the final 3 years, the study has excited about acquiring a extra exact estimate of the emission of ammonia at the deposition of SOx, NOy and NHx, and in addition on quantifying results on woodland and heathland ecosystems. This quantification of results incorporated experimental paintings version analyses, and derivation of serious quite a bit and degrees for wooded area and heathland ecosystems. moreover, state of affairs analyses have been made with the Dutch Acidification structures version (DAS) so that it will review the effectiveness of coverage measures. The examine itself, which shaped the root for this booklet, has been defined within the stories on person tasks. A precis of the medical effects and conclusions is given in thematic studies (added as annex).
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Extra info for Acidification Research in The Netherlands: Final Report of the Dutch Priority Programme on Acidification
1988 Summary report; Acidification research 1984 - 1988, Report nr. 00-06 - 37 - 2. 1 The importance of ammonia emissionsin the Netherlands in relation to acidification Initially, when it became evident that the environment is affected by the deposition of acidic compounds, the acidification was related to sulphur compounds. Later on it was established that also compounds originating from nitrogen oxides contribute to acid deposition. During the eighties it became clear that deposition of atmospheric ammonia and ammonium causes acidification, through nitrification in the soil.
A considerable reduction in needle mass and stem mass on this soil type occurs between 1970 and 2000, when deposition of N and potential acid are highest. The soil type Leptic podzol is least sensitive to the effects of soil acidification and increased N availability. - In the south-eastern part of the Netherlands the increase of deposition of N and potential acid between 1970 and 1990 leads to a net decrease of needle mass (forest health) and wood production. g. coastal regions, there is a positive effect of enhanced N-deposition on needle mass and wood production.
These reductions are, of course, the result of considerable emission reductions: NH, emissions are expected to be reduced particularly in the Netherlands. The total acid deposition levels in 1980 and 1989, as depicted in Figure 1, differ slightly from the values indicated in Section 3 of this summary. The main reason for this is the fact that the values given in Section 3 are based on deposition measurements and are determined for that specific year, taking into account the meteorological conditions in that year.