Research concerning the influence of climate change on grapevine (original) (raw)
2009
Abstract
During the last years there have been recorded very hot periods during the summer, deficits of precipitations, a more reduced growth of the berries, an acceleration of the phenological stages, the harvesting of the grapes being proceeded with up to two weeks. Also, there have been recorded increased accumulations of sugars in the grapes outrunning with 30 g/l the values obtained during normal years. The year 2007, the hottest in the last decade, with a pronounced deficit of precipitations from the interval May-August determined a predominance of a productive activity and high content of sugar (224.1 g/l in Guyot on demi-high trunk, 216.2 g/l in Cazenave cordon and 202.7 g/l in spur-pruned cordon). Pursuant to these changes there have also been recorded differentiated distributions of the dry matter between the various organs of the vines. The climate warming accentuated in the last years has influences positively the quality of grapes allowing the acquirement of high quality wines.
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