Abstract
The effects of different applied water amounts on the behavior of parameters derived from trunk diameter fluctuations (TDF) were studied during three consecutive seasons (2004 to 2006) in a mature vineyard planted with Vitis vinifera cv. Tempranillo and cv. Cabernet Sauvignon in Albacete (Castilla-La Mancha, Spain). Maximum daily trunk shrinkage (MDS) was calculated from TDF. The response of MDS to different irrigation treatments varied in the amplitude of the signal between the two cultivars. MDS of cv. Tempranillo was significantly higher than that of cv. Cabernet Sauvignon in the period before veraison for the three experimental years. MDS decreased in magnitude after veraison regardless of irrigation treatment and tended to be similar in the two varieties, except for one year where there were cultivar differences in yield caused by differential effects of a frost. Irrigation treatment differences in MDS were significant in 2004 and 2005 at pre and post-veraison, while in 2006 they were non-significant possibly due to the very little yield caused by a late frost which affected differentially the cultivars, thus suggesting that yield level may be another factor to consider when attempting to use MDS for irrigation management. Therefore, it appears that the use of trunk diameter sensors for irrigation scheduling in wine grapes would require a specific calibration for the different cultivars.
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.