Abstract
BIOSOLFootnote 1 and BACTOSOLFootnote 2 organic fertilizers based on residue from commercial antibiotic production, were tested as an alternative to mineral fertilizers in reforestation and in revitalization of Norway spruce stands (Picea abies) affected by forest decline. Due to its slow release of N and its stimulation of root growth, the organic fertilizer was superior to mineral fertilizer in enhancing growth of spruce planted in nutrient poor soil with low nutrient retention capacity, especially when combined with magnesium carbonate fertilizer. In mature stands, basal area increment responded positively and significantly to both mineral fertilizer and BIOSOL. So far no pronounced effects of fertilizer treatment on seed production and viability were observed. Fertilization in the moderate amounts employed had no adverse effects on microbial activity in the soil and mycorrhizal status and thus seems to be a safe method to increase tree vigor without dramatically changing site parameters.
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Notes
BIOSOL and BACTOSOL are registered trademarks of Biochemie Ges.m.b.H., Kundl, Austria.
BIOSOL and BACTOSOL are registered trademarks of Biochemie Ges.m.b.H., Kundl, Austria.
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Glatzel, G., Haselwandter, K., Katzensteiner, K. et al. The use of organic and mineral fertilizers in reforestation and in revitalization of declining protective forests in the alps. Water Air Soil Pollut 54, 567–576 (1990). https://doi.org/10.1007/BF00298694
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DOI: https://doi.org/10.1007/BF00298694