Early pruning vs. late pruning in Pinot Noir and Sauvignon Blanc
Keywords:
bud brake, grape, vines, Guyot training, canopy, shootsAbstract
The study examines the effects of early versus late pruning on the growth, yield, and grape quality of Pinot Noir and Sauvignon Blanc from Recaș region, Romania, with a focus on the influence of pruning timing on canopy and ripening characteristics. Over three growing seasons (2021–2023), a randomized complete block design was used with 15 vines per pruning treatment (early and late) for each variety. Early pruning was conducted during dormancy, and late pruning post-budburst. Key parameters such as bud break timing, shoot length, yield components, and berry quality (sugar content, titratable acidity, and pH) were recorded. Early pruning increased bud break percentage, shoot length, and sugar levels, promoting faster ripening, while late pruning delayed bud break, retained acidity, and maintained a fresher profile. Pinot Noir responded with higher sugar and pH under early pruning, whereas Sauvignon Blanc retained vegetative growth with late pruning. Early pruning accelerated ripening, enhancing sugar and pH, beneficial for cooler climates, whereas late pruning preserved acidity and vegetative growth, favorable for maintaining freshness in warmer regions. These findings support pruning adjustments based on climate and desired wine styles.
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