Abstract
The objective of the experiment was to evaluate the effect of hydrogenated cyanamide (0%, 2%, 4% and 6%) on breaking dormancy and production of the Merlot vine variety. Variables: number of shoots and bunches, sprouting and fertility index, bunches mass, yield, 0Brix and cost benefit ratio. The doses of 4 and 6% increased bud sprouting without affecting their fertility. Except for the fertility index, the Merlot variety showed a linear response to the application of hydrogenated cyanamide (Dormex®) to the other parameters evaluated, however, the results varied little between the doses of 4 and 6%, indicating the most adjusted dose as 4% considering productivity per hectare.
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