Calibración y validación de un modelo matemático de estimación del estado hídrico del viñedo
- J.M. Mirás-Avalos
- J.M. Escalona
- E.P. Pérez-Álvarez
- P. Romero
- N. Torres
- L.G. SANTESTEBAN
- D. Uriarte
- D.S. Intrigliolo
- I. Buesa
ISSN: 2013-6099
Year of publication: 2024
Issue: 84
Type: Article
More publications in: Enoviticultura
Abstract
Decision support tools can advise on optimizing irrigation or on the feasibility of growing grapes in rainfed conditions, but algorithms capable of reliably determining vine water status are needed. This study has upgraded a soil water balance model specific for vineyards by incorporating an equation that provides midday stem water potential (Ystem) data. The model was validated under a wide range of Spanish vineyards involving different grapevine cultivars, soils, climate conditions, and watering regimes, totaling 129 scenarios. The model satisfactorily reproduced the evolution of Ystem over the growing season, although it tended to slightly overestimate the measured Ystem values. The mean difference between the simulated and measured values was 0.024 MPa. Therefore, this upgraded model constitutes a reliable basis for a computerized decision support tool for water management in vineyards under both rainfed and irrigated conditions.