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  • 1.
    Majdi, Hooshang
    et al.
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för naturvetenskap.
    Viebcke, CG
    Effects of fertilization with dolomite Lime plus PK or wood ash on root distribution and morphology in a Norway spruce stand in Southwest Sweden2005In: Forest Science, ISSN 0015-749X, E-ISSN 1938-3738, Vol. 50, no 6, p. 802-809Article in journal (Refereed)
    Abstract [en]

    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, mg(-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.

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