Río Negro
Styles
Principal grape varieties
Terroir
Natural factors
- Páramo 'Río Negro': acidic soils, 940–1,000 m elevation, low in Ca and Mg, high in clay content; trace elements: low Sr, high Rb and Ba.
- Soils with pseudogleying: surface gravels, subsurface clay accumulation, Fe and Mn segregations producing mottled colors.
- High-altitude continental Mediterranean climate: diurnal temperature range exceeding 20 °C during the ripening period.
- Ravines drain cold air toward lower elevations; wind acting through adiabatic compression functions as a natural fan, preventing radiation frosts.
- Forest cover (pines, junipers, oaks, holm oaks, aromatic plants) raises soil terpene levels via leaf litter and root exudates.
Human factors
- Tinto Fragoso: a variety endemic to Cogolludo, with no documented existence anywhere else in the world.
- Periodic lime amendments historically applied to offset the acidic character of the soil, a defining ancestral cultural practice.
Terroir / wine link
- Acid soil low in calcium → easy Ca uptake by the vine → wines with elevated calcium (≥25 mg/l), a distinguishing trait compared to IGP Castilla.
Facts drawn from the cahier's terroir-link section (Lien au terroir) by automatic interpretation — see the the specification.
Sources
- National pliego de condiciones (PDF)
- eAmbrosia register (EU) — File number PDO-ES-03003
- Official trade body site — Finca Río Negro