Training and pruning trials on Pinot noir, Gamay and Chasselas vine plants | Essai de conduite et de taille sur Pinot noir, Gamay et Chasselas
2005
Murisier, F. | Zufferey, V. (Agroscope RAC Changins, Station federale de recherches agronomiques, Pully (Switzerland). Centre viticole du Caudoz)
An experiment on training and pruning systems was set up in 1991 on Pinot noir, Gamay and Chasselas vine plants at the Agroscope RAC Changins experimental estate in Pully (Vaud, Switzerland). For the two red grape varieties of vine, Guyot pruning (single or double) was compared with alternate cordons (alternating long and short cut shoots) and with open lyre pruning. In the Chasselas trial, a comparison of single and double Guyot pruning at varying inter-vine distances was made with normal and alternating cordon-pruned systems. Various agronomic, analytical and organoleptic parameters were monitored. From 1997 to 2000, vinifications of red grape vine plants were compared. For all the experimental vines, yield was limited to one cluster per plant. Yield levels were thus similar for all the training and pruning systems studied. Short pruning in cordon-trained plants resulted in reduced bud fertility which, in spite of slightly heavier berries, needed less fruit-thinning operations to obtain required yield levels. At equivalent yields, training system and type of pruning had no significant influence on the quality of grapes and wines. Cordon pruning and lyre training had no noticeable effects on plant strength (expressed by individual weight of plant wood) which was comparable with that of plants pruned in double Guyot. Single Guyot pruned plants proved to be a little more vigorous than double Guyot by Pinot noir and Chasselas vines. Lengthening of shoots was reduced by alternate cordon pruning. Spacing distances between plants along the row did not noticeably influence plant behaviour.
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