WW AS 02
A study of the interaction between vine vigour and water stress incorporating conventional and non-destructive measuring techniques
Strever, A E
University of Stellenbosch. Department of AgriSciences. Department of Viticulture and Oenology
Myburgh, P A
Du Toit, P G
Strever, A E
To investigate the interaction of plant vigour and plant water status, as well as the potential for non-destructive assessment as part of the plant water status monitoring strategy.
The initial phase of the project started in selected plots (part of VE-OR1 study) in and around Stellenbosch. Initially, non-destructive techniques of monitoring water status of vines, as well as neutron probe monitoring and predawn leaf water potential measurements were performed. Results from this showed that it was necessary to focus on the calibration of soil water content and plant water status measurement, and that the ideal would be to lay out a trial incorporating different irrigation regimes on different vigour level plots within a vineyard. With this in mind, the installation of an irrigation trial initiated in 2006 at Dornier wines near Stellenbosch (Merlot/R110) and some preliminary measurements were performed. Preliminary data from the previous season confirmed that the possible impact of vigour variability along with water status changes, could be extremely important in determining grape quality as well as wine style.
Boshof, C J, Strever, A E and Du Toit, P G. 2005. A study of the interaction between vine vigour and water stress with the incorporation of conventional as well as non-destructive measurements. Poster presented at the 3rd International Congress of the Society for Enology and Viticulture. 7-8 November, Cape Town, South Africa.
Strever, A E. 2005. Investigating the effects of vine vigour variability on the source:sink balance of vines and possible impact on vine water status modelling. Paper presented at the 3rd International Congress of the South African Society for Enology and Viticulture. 7-8 November, Cape Town, South Africa.
Strever, A E, Potgieter, E and Young, P R. 2008. A study of vine pigmentation reaction to water stress with the incorporation of conventional as well as hyper-spectral measurement techniques. Paper presented at the 59th Meeting of the American Society for Enology and Viticulture. Portland, Oregon, United States.
Kamffer, Z. 2009. Carotenoid and chlorophyll contentin Vitis vinifera L. cv Merlot grapes during ripening with reference to variability in grapevine water status and vigour. MSc Agric. University of Stellenbosch, Stellenbosch, South Africa.