Vine plant age. I. Influence on physiological behaviour | Age de la vigne. I. Influence sur comportement physiologique des souches
2007
Zufferey, V., Station de recherche Agroscope Changins-Waedenswil ACW, Pully (Switzerland). Centre viticole du Caudoz | Maigre, D.
The Agroscope Changins-Wädenswil Research Station ACW set up an experimental trial to compare the physiological behaviour of old and young vines. Six different varieties (Chasselas, Pinot blanc, Arvine, Gamay, Syrah and red Humagne) were included in the study which was made on the experimental estate at Leytron (Wallis, Switzerland) between 2002 and 2006. Young vine plants were more subject to conditions of water stress than old vines because of their superficial root systems. In the present study, moderate water stress in young vines was observed in 2005 and 2006 whereas old vines showed low stress for the same period. Plant growth in older vines was greater than that of the younger grapevine plants, irrespective of variety. Not only was the weight of clippings and pruned wood found to be higher in old vines, but also values of the chlorophyll index and nitrogen content in leaves.
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