RT Journal Article
SR Electronic
T1 Effect of Drip Irrigation Schedules on Growth, Yield, Must Composition and Wine Quality of Cabernet Sauvignon
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 77
OP 85
DO 10.5344/ajev.1985.36.1.77
VO 36
IS 1
A1 Y. Hepner
A1 B. Bravdo
A1 C. Loinger
A1 S. Cohen
A1 H. Tabacman
YR 1985
UL http://www.ajevonline.org/content/36/1/77.abstract
AB Four drip irrigation schedules were studied in a Cabernet Sauvignon vineyard located at Luzit in the Adulam region of Israel. Seasonal water application in the range of 220 to 320 mm did not have a considerable effect on wine quality, whereas 400 mm caused a significant quality reduction. Irrigation cut back during the last six weeks before harvest advanced ripening, but this was not necessarily always connected with improved quality. Irrigation had a greater effect on growth than on crop level and therefore altered the crop load expressed as yield to pruning weight ratio. The yield to pruning weight ratio varied between 4 and 10 and was positively related to wine quality and color, and tartaric to malic acid ratio of the must. Negative relationships were found between wine quality and several parameters such as pruning weight, berry weight, leaf, must and wine K content, total and malic acid content, and wine pH. The involvement of specific and non-specific irrigation effects on wine quality is discussed.