Abstract
Evaporative potentials (the capacity of the atmosphere to evaporate water as quantified with atmometers) of canopies of two grape varieties were evaluated in relation to method of vine training and removal of basal leaves around grape clusters. In canopies of Chenin blanc, evaporative potentials were significantly less in bilateral cordon-trained vines supported by a standard U trellis than in bilateral and quadrilateral cordon-trained vines supported by one-wire and Geneva double curtain trellises, respectively. In Sauvignon blanc, evaporative potentials were significantly less in bilateral cordon-trained vines supported by a 46-cm, T-crossarm trellis than in quadrilateral cordon-trained vines supported by Davis modified U and extended Wye double curtain trellises. Leaf removal increased evaporative potentials significantly in vine canopies of all training and support systems. Evaporative potential was correlated significantly with the density of canopies associated with imposed training methods and leaf removal treatment. As the number of leaf layers through a canopy decreased, evaporative potential increased.
- Received October 1988.
- Copyright 1990 by the American Society for Enology and Viticulture
Sign in for ASEV members
ASEV Members, please sign in at ASEV to access the journal online.
Sign in for Institutional and Non-member Subscribers
Log in using your username and password
Pay Per Article - You may access this article (from the computer you are currently using) for 2 day for US$10.00
Regain Access - You can regain access to a recent Pay per Article purchase if your access period has not yet expired.