By G. J. Heij, T. Schneider
This booklet comprises the implications and conclusions of in depth study at the reasons and results of acidification of forests/forest soils and heathland within the Netherlands. In 1985 the Dutch precedence Programme on Acidification was once all started 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 considering acquiring a extra actual estimate of the emission of ammonia at the deposition of SOx, NOy and NHx, and in addition on quantifying results on wooded area and heathland ecosystems. This quantification of results incorporated experimental paintings version analyses, and derivation of severe a lot and degrees for wooded area and heathland ecosystems. in addition, state of affairs analyses have been made with the Dutch Acidification structures version (DAS) in an effort to assessment the effectiveness of coverage measures. The study itself, which shaped the root for this publication, has been defined within the studies on person initiatives. A precis of the clinical effects and conclusions is given in thematic experiences (added as annex).
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Additional info for Acidification Research in The Netherlands: Final Report of the Dutch Priority Programme on Acidification
Especially the soil modelling work in the Dutch Priority Programme on Acidification has been closely related to the work on mapping of critical loads and levels. ); effects on groundwater quality have not been incorporated in the programme; nevertheless some results of a separate research project are reported here; research on efflux from rootzone to groundwater has been part of a number of projects; only emissions of ammonia have been incorporated in the programme to a certain extent; emissions of SO2 and NO, have only been included in the integrated assessment study; information on S a and NO, emissions is highly compatible with UN-ECE data.
Verhoeff, Director - 33 - of Agricultural Research at the Ministry of Agriculture, Nature Management and Fisheries (LNv). With the Programme Director, a Project Group of up to 13 researchers has been responsible for the co-ordination and evaluation of the research projects. Members of this group each covered a specific research subject. Hofschreuder, Agricultural University). Voorburg (IMAG). B. V. Ir. V. J. C. H. V. H. Zuidema National Council for Agricultural Research About 30 research institutes have been involved in the second phase, carrying out some 50 projects.
H202, SO:; N O i , NH,; HN03. HC I Growth Analysis of rings of growth Diameter straps Ouantity of throughfall Chemical composition of throughfall Actual water flow velocity Respiration I I Water flux soil manipulation I i - Soil chemistry Chemistry of soil water Mineralisation , Delnitrification Nutrienl fluxes I ~ o i manipuiarion i Root density Biomass (deadilive) Root activity Chemical composition? Mineral uptake? Soil biology Mycorrhizae Nematodes Fig. 3 Quantity of litter Chemical composition Decomposition rate Nutrient leaching - Soil structure Moisture content I litter I soil emissions Evaporation of water CO?
Acidification Research in The Netherlands: Final Report of the Dutch Priority Programme on Acidification by G. J. Heij, T. Schneider