Details

Autor(en) / Beteiligte

• van Heerden, Kees
• van Grinsven, Hans J.M.
• Tiktak, Aaldrik

Titel

Simulation of forest stress for the Solling spruce site with soilveg

Ist Teil von

• Ecological modelling, 1995-12, Vol.83 (1), p.185-195

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

1995

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• The soilveg model was applied to Solling to evaluate the effects of various stress factors on the Norway spruce stand (F1). First, hydrology, soil solution chemistry, tree growth and nutrient status for a Norway spruce were simulated for 1976–1989. soilveg could reproduce mean concentration levels for all major solutes. However year-to-year variations at greater depths, particularly for nitrate, often could not be explained. soilveg could also reproduce stem growth and nutrient concentrations in foliage. The model shows that in spite of large precipitation surpluses and waterholding capacities, drought is a relevant stress factor for Solling. Magnesium is the most limiting nutrient for growth of the F1 stand. In dry years, drought is the most important factor impeding uptake of Mg, in wet years pH is more important. However, it can not be concluded that a pH decrease due to acid deposition is an important stress factor for the F1 stand as the extent of the pH decrease is unknown. Simulations with optimal irrigation and fertilization, combined with elimination of air pollutants doubled the current stem growth of F1. The absolute effect of individual stress factors can not be quantified because combined manipulations give a larger growth increase than may be expected from single manipulation. The importance of the stress factors for F1 can be ranked: fertilization > irrigation > air pollution. Simulations further indicate that elimination of S and N in throughfall initially (20 years) will decrease stem growth.