Suchergebnisse

[EN] [Aim] To obtain specific references for the nutritional diagnosis of ten essential nutrients for leaf blade and petiole of 'red Grenache' (Vitis vinifera L.). ; [Methods and results] Leaf blades and petioles from 36 vineyards of 'red Grenache' (Vitis vinifera L.) grafted on Richter 110 were collected and analyzed at flowering and veraison between 1992 and 2008. Using the compiled data bank, nutritional references for ten elements (N, P, K, Ca, Mg, Fe, Mn, Zn, Cu and B were calculated. Optimal values were those around the central data (μ ± 0.25σ), while excessive and deficient values were those beyond the tails of the distribution (μ ± 0.84σ). Percentile calculation was performed when transformations to normal distributions became unlikely. ; [Conclusion] References for Sufficiency Ranges (SR) and Deviation from Optimum Percentage (DOP) methods were obtained for those ten nutrients studied. ; [Significance and impact of the study] The proposed 'red Grenache' references for leaf blade and petiole contribute to the improvement of the accuracy of 'red Grenache' grapevine nutrient diagnosis based on tissue analysis. These references are a guide to assess the nutritional status of 'red Grenache' grapevine around the world in general and, with higher accuracy, for the Rioja region and areas with similar vineyard conditions. ; [FR] [Objectif] Obtenir des références spécifiques pour le diagnostic nutritionnel de dix éléments nutritifs essentiels au limbe et pétiole de 'Grenache noir' (Vitis vinifera L.). ; [Méthodes et résultats] Les limbes et pétioles des feuilles provenant de 36 vignobles de 'Grenache noir' (Vitis vinifera L.) greffés sur Richter 110 ont été recueillis et analysés à la floraison et à la véraison entre 1992 et 2008. À partir de la banque de données, des références nutritionnelles pour dix éléments (N, P, K, Ca, Mg, Fe, Mn, Zn, Cu et B) ont été calculées. Les valeurs optimales étaient celles autour de la valeur centrale de données (μ ± 0.25σ), tandis que les valeurs excessives et déficientes étaient celles au-delà des extrémités de la distribution (μ ± 0.84σ). Lorsque les valeurs n'étaient pas conformes à une distribution normale et que la transformation logarithmique n'était pas efficace, les percentiles correspondants ont été calculés. ; [Conclusion] Les références pour les méthodes Gammes de Suffisance et Déviation du Pourcentage Optimal ont été obtenues pour les dix nutriments étudiés. ; [Signification et impact de l'étude] Les références pour le limbe et le pétiole de 'Grenache noir' contribuent à l'amélioration du diagnostic de nutriments. Ces références sont un guide pour évaluer l'état nutritionnel des vignes de 'Grenache noir' dans le monde et, avec une plus grande précision, dans la région de Rioja et dans d'autres régions similaires. ; This study was supported by the National Institute of Agricultural Research (Spain) and the Regional Government of La Rioja (Spain) with Projects INIA-SC00-016, PR-01-03, PR-01-04 and PR-03-05, among others. We also thank Mrs. M. Carmen Arroyo, the staff at the Regional Laboratory of La Grajera (La Rioja), the staff at the Viticulture and Oenology Section (SIDTA-ICVV), and the vine growers who helped develop the database. ; Peer Reviewed

Deviation from optimum percentage (DOP) is a diagnosis methodology for leaf analyses which expresses the deviation for each element with respect to its optimal concentration. This deviation is an individual index for each nutrient and allows the sorting of all the analyzed nutrients according to their limitations. A nutritional survey was undertaken over eleven years in La Rioja (Spain), to establish reference concentrations for the nutritional diagnosis of Vitis vinifera L., cv. 'Tempranillo' grafted on Richter-110. Reference concentrations for DOP methodology are proposed, and sensibility for the nutritional diagnosis was evaluated for blade and petiole analysis of N, P, K, Ca, Mg, Fe, Mn, Zn, Cu, and B at flowering and veraison phenological stages by comparison between DOP and sufficiency ranges (SR) methods. Results suggest that petiole has lower sensibility than blade to detect deficiencies or excesses of N, P, K, Ca, Mg, Zn, and Mn at veraison. In addition, petiole is a better tissue than blade to detect Fe and B deficiencies or excesses. Therefore, our results make possible the right choice between tissues, leaf blade or petiole, for a general nutritional diagnosis of 'Tempranillo' grapevines. On the other hand, it is possible to evaluate the status of each nutrient in each phonological stage analyzing both tissues and comparing the nutrient status to its references, DOP or SR, in the most adequate tissue. ; This study was supported by the Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA, Spain), the European Social Fund and the Regional Government of La Rioja (Spain): Projects INIA-SC00-016, PR-01-03, PR-01-04, and PR-03-05, among others. ; Peer Reviewed