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Increased production of 'Pinot Noir' with application of biostimulants
- Fagherazzi, A. F., Mario, A. E., Turmina, A. G., Lerin, S., Cristofolini, F. R., Andriao, M. A., Rufato, L.
- Acta horticulturae 2017 no.1157 pp. 413-416
- acidity, cell structures, cultivars, disease incidence, experimental design, flowering, grapes, growth regulators, regression analysis, small fruits, total soluble solids, viticulture, wines, Brazil
- Growth regulators are increasingly present in modern viticulture, as an alternative to increase production and quality. They act directly on different cell structures inducing physical, chemical and metabolic changes. The 'Pinot Noir' cultivar is considered the noblest of red grapes and is used for the production of wines. It is characterised by low productivity and compact bunches, which increase the incidence of diseases. In this context, the objective of this study was to evaluate the effects of different doses of biostimulant (Stimulate®) in 'Pinot Noir' to see the effect on the productivity and on the bunches' physicochemical characteristics. The study was conducted with the 2011-2012 harvest in Muitos Capões city, RS, Brazil. The treatments were: T1: Control; T2: 0.1%; T3: 0.2% and T4: 0.3% of Stimulate® applied in full bloom. The experimental design was a randomised block with six repetitions. The variables evaluated were the width of the bunch, bunch weight, soluble solids, rachis weight, total acidity, berry diameter, bunches length and productivity. The results were subjected to regression analysis with the WinSTAT statistical program. For the doses tested, we highlighted the dose of 0.2%, which provided an increase in soluble solids, a reduction of acidity and an increase in the diameter of berries. For weight of bunches and productivity per hectare, the increasing doses promoted a linear increase, while for bunch width and weight of rachis a linear decrease occurred. We can conclude that the application of 0.2% Stimulate® bioregulator positively alters the bunches' physicochemical characteristics of 'Pinot Noir', leading to higher productivity.