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Effects of Fertilization with Dolomite Lime+PK or Wood Ash on Root Distribution and Morphology in a Norway Spruce Stand in Southwest Sweden

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Pelleted wood ash (A) or crushed dolomite lime with added potassium and phosphorous (CaMgPK) was applied to plots in a 60-yr-old Norway spruce stand in Southwest Sweden. Eight years later, we measured the effect of these treatments on a number of root parameters, including root biomass and distribution (in different diameter classes), root length density (cm cm−3 soil), specific root length (SRL, m g−1 DM), and number of mycorrhizal root tips. Layers sampled included the humus layer and the upper 30 cm of the mineral soil. The total fine root (0–1 mm) biomass in the mineral soil layer was lower in the A plots than the control plots, and the fine root (1–2 mm) systems were shallower in the A plots compared to both the control and CaMgPK plots. SRL was higher in the humus layer in both the CaMgPK and A plots than in the controls, and higher in the CaMgPK than in the A plots. The number of mycorrhizal root tips was also higher in the treated plots than in the controls, with the highest numbers being found in CaMgPK plots. Based on our results, we conclude that both the CaMgPK and ash treatments resulted in changes in root morphology and, therefore, presumably increased the capacity for nutrient uptake. FOR. SCI. 50(6):802–809.

Keywords: Fine roots; Norway spruce; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; liming; natural resource management; natural resources; root length; wood-ash recycling

Document Type: Regular Article

Affiliations: 1: Professor Department of Ecology and Environmental Research Swedish University of Agricultural Sciences PO Box 7072 Uppsala Sweden SE-750 07 Phone: 46 (0)18 67 24 28;, Fax: 46 (0)18 67 34 30, Email: 2: Research Assistant Department of Ecology and Environmental Research Swedish University of Agricultural Sciences PO Box 7072 Uppsala Sweden SE-750 07 Phone: 46 (0)18 67 24 28;, Fax: 46 (0)18 67 34 30

Publication date: 2004-12-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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