Abstract. The vineyard protection with plastic sheets alters the light microclimate influencing the vine physiology and the grape quality. A study has been undertaken on table grapes to test if colored plastic films (yellow and pink) may improve their physiological and reproductive parameters. In cv Victoria, which has not too much dense canopy, very high productivity and white berry, the only improvement was a higher berry sugar content obtained with the yellow film, but in correspondence with a lower theoretical grape yield. In cv. Black Magic, which has very dense canopy, medium-high productivity and black berry, the two colored films stimulated the leaf gas exchange, possibly due to a compensation for a lower vegetative growth; the yellow film improved some aspects of the skin color; the pink film enhanced the sugar/acid ratio and than the precocity.
Ambiente radiativo, funzionalità fogliare e qualità del frutto in un vitigno a bacca bianca e a bacca nera
DE PALMA, LAURA;LIMOSANI, PATRIZIO;
2012-01-01
Abstract
Abstract. The vineyard protection with plastic sheets alters the light microclimate influencing the vine physiology and the grape quality. A study has been undertaken on table grapes to test if colored plastic films (yellow and pink) may improve their physiological and reproductive parameters. In cv Victoria, which has not too much dense canopy, very high productivity and white berry, the only improvement was a higher berry sugar content obtained with the yellow film, but in correspondence with a lower theoretical grape yield. In cv. Black Magic, which has very dense canopy, medium-high productivity and black berry, the two colored films stimulated the leaf gas exchange, possibly due to a compensation for a lower vegetative growth; the yellow film improved some aspects of the skin color; the pink film enhanced the sugar/acid ratio and than the precocity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
