Base Cation Mobility in Vineyard Soils of the Colli Albani Volcanic District (Central Italy)

Abstract The quality of the Colli Albani volcanic soils has certainly contributed to vine cultivars hence name one oldest wines (i.e., Alban wine). alkali up 15 wt%, SiO2 ≤ 52 wt% and emplacement at high temperature (≤ 600 °C) are bedrock features that have deeply influenced soil-forming processes in vineyards. However, peculiar not well known. Field survey textural, mineralogical, chemical data obtained with SEM, EMP, XRD, ICP-OES were used characterize vineyard Albani. Leucite (Lct)-bearing quartz (Qz)-bearing occur studied vineyard. Qz-bearing represent more weathered material, depleted primary minerals enriched clays, which show a lower cation exchange capacity (CEC) than Lct-bearing soils. CEC is misleading definition for because base mobility independent from clay mineral enrichment soil. Actually, release K, Na, Ca, Mg depends by (i) complete dissolution leucite analcime, (ii) oxy-reaction affecting phlogopite, releases K + Mg, (iii) incongruent clinopyroxene characterized “gothic texture.” This texture highlights Ca Quantification abundance mandatory management and, general, it significative vineyards areas.