Does Soil Acidification Matter? Nutrient Sustainability of Timber Harvesting in Forests on Selected Soils Developed in Sediments of the Early vs. Late Pleistocene

• Published in: Forests Vol. 15; no. 7; p. 1079
• Main Authors: Zimmermann, Stephan, Kurz, Daniel, Thrippleton, Timothy, Mey, Reinhard, Perry, Niál Thomas, Posch, Maximilian, Schweier, Janine
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.07.2024
• Subjects: Acidic soils; Acidification; base cations; Biomass; Environmental protection; Environmental sustainability; Ethylenediaminetetraacetic acid; Fluxes; Forest harvesting; Forest management; Forestry; Forests and forestry; Geologic mapping; Geological mapping; Harvest; Harvesting; Instrument industry; International economic relations; Investigations; Leachates; Leaching; Nutrient balance; Nutrient loss; nutrient mass balances; Nutrient removal; nutrient sustainability; Nutrients; Pleistocene; Precipitation; Root zone; Sediments; Sediments (Geology); Soil acidification; Soils; stem wood harvest; Sustainability; Timber; Trees; Weathering; whole-tree harvest; wood nutrient contents; Canada; United States; Germany; Switzerland
• ISSN: 1999-4907; 1999-4907
• DOI: 10.3390/f15071079

With this study, our aim was to estimate the nutrient fluxes relevant for assessing nutrient sustainability as accurately as possible and to calculate nutrient balances for alternative forest management scenarios. Furthermore, we tested whether mapping units from existing geologic maps can serve as a basis for forest practitioners to estimate nutrient sustainability or whether more detailed data are needed. Positive fluxes include deposition and weathering, while negative fluxes include losses due to leaching and nutrient removal through timber harvesting in the balance. Weathering and leachate losses were modeled with a geochemical model. The SwissStandSim model was used to simulate the biomass growth under different harvesting and silvicultural strategies, allowing for sustainability to be assessed for each nutrient at a given intensity of use. This assessment was made per rotation period based on two criteria: (i) nutrient supply and (ii) total stocking volume. As a result, it can be noted that the accurate estimation of individual fluxes is essential for assessing the sustainability of forestry practices and that it needs detailed site-specific data. Various influencing factors turned out to be important, particularly the assumed depth of the root zone.