Published in Scientific Papers. Series B, Horticulture, Vol. LXV, Issue 2
Written by Boyan STALEV, Ludmil ANGUELOV, Vera STEFANOVA
The study was conducted at the Department of Viticulture and Fruit Growing. The aim is to find out how Gomat Rost affects the vegetative and reproductive manifestations of a variety 'Merlot’. The results of the experiment showed when applying with doses of 1 to 4 L/Ha, leads to a change in the growth dynamics of the different variants in the experiment. Treated in four different stages of the growing season, it has a positive effect on the vine plants included in the experiment compared to the control variant. The result of the application of higher doses has a positive effect on the growth and shoots maturation and increase the grapes mass. This is found despite the small amount of soil available and 35% atmospheric humidity. This is confirmed by the data on the yield and the sugar and acidity content in the grapes during harvest. In the variants treated with the highest dose of 4 L/Ha sugars and acids remain stable close to those for normal fermentation. This is very important for wine grape varieties in order not to dilute the grape must in order to compensate for the water that has evaporated during veraison. From a technological point of view, vines subjected to water stress causes problems in the fermentation process.
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