The ratio yield-quality of "Fernao Pires" cultivar | La relation rendement - qualite sur le cepage "Fernao Pires"
1999
Climaco, P. | Tralhao, Guida | Castro, R.
English. The study of the ratio yield-quality of "Fernao Pires" cultivar was based on a vineyard training systems (erected cordon) designe, established at "Dois Portos" in 1992. Only modalities of short pruning were selected for this study, established on a Calcaric Fluvisol (FLc). Those were an unilateral cordon with vines spaced 0,8 and 1 m in rows (5,000 and 4,000 vines/ha) and a bilateral cordon with vines spaced 1,2 m in rows (3,333 vines/ha). In spite of yields great difference in 1998, the results showed that the sugar content and the total acidity content of musts were not negatively affected by the grape producion increasing. The specific characteristics of this cultivar, mainly it early maturation and its sugar high potential, could provide an explanation to these results
Show more [+] Less [-]French. D'apres un essai de systemes de conduite en monoplan ascendant, etabli a Dois Portos en 1992, on a etudie la relation rendement - qualite sur le cepage "Fern¦o Pires" (B). Pour cet etude, implante sur un Fluvisol Calcarique (FLc), on a choisi seulement des modalites en taille courte, c'est a dire, le cordon unilateral avec des ecartements sur la ligne de 0.8 et de 1 m (respectivement, 5 000 et 4 000 ceps/ha) et le cordon bilateral a 1.2 m d'ecartement (3 333 ceps/ha). Malgre la grande fourchette de rendements obtenus en 1998, sur ce cepage, les resultats montrent que l'augmentation de la production de raisins n'exerce pas des effets negatifs sur la teneur en sucre et sur la teneur en acidite totale des mouts. Une explication pour ses resultats peut etre basee dans les caracteristiques propres de ce cepage, notamment, sur sa precocite de maturation et son haut potentiel en sucre
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