Technical Report
 

Effect of Canopy Location on Yield Components and Fruit Composition in Pinot noir Grapevines Trained to the Scott Henry Trellis System

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  • Pinot noir vines, trained to the Scott Henry trellising system were separated into four different quadrants: Bottom canopy, trained toward the ground; Top canopy, trained upwards; East orientation, receiving the morning sunlight; and West orientation, receiving afternoon sunlight. Yield components and fruit composition were measured for each canopy, orientation, and then for each quadrant. The bottom canopy had higher yield, cluster weight, titratable acidity, and total sugar per vine, than did the top canopy. Must soluble solids were not significantly different between the two canopies. The top canopy had a significantly higher pH. The East side of the vine, the side that receives direct morning sunlight, had a higher yield, cluster weight, and total sugar per vine than did the West side of the vine. The West side of the vine, the side that receives direct afternoon sunlight, had higher titratable acidity than did the East side of the vine. Must soluble solids were not significantly different between the two sides of the vine. The bottom-east quadrant had a significantly higher yield, and total sugar per vine, than did the other three quadrants.
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