Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: EFFECTS OF CLUSTER ZONE LEAF REMOVAL ON NORISOPRENOIDS OF PINOT NOIR FRUIT AND WINE, PART 1: CANOPY MICROCLIMATE AND FRUIT QUALITY

Location: Horticultural Crops Research

Project Number: 5358-21000-042-03
Project Type: Grant

Start Date: Aug 27, 2009
End Date: Sep 30, 2013

Objective:
1. Determine the impact of cluster zone leaf removal in modifying microclimate for fruit quality in both high and low vigor vines. 2. Evaluate impacts of microclimate on total phenolics and anthocyanins of Pinot noir. 3. Improve the understanding of leaf pulling on formation of norisoprenoids in Pinot noir grapes and wine in relation to inherent vine vigor. 4. Link vine vigor, leaf removal and composition to sensory characteristics of wines.

Approach:
Study Pinot noir at two distinct locations in Oregon: a vigorous, dry farmed site (Willamette Valley) and a low vigor site (Southern Oregon). These vineyards will have the same cultivar and rootstock to reduce between site variability. The experimental vineyards will be monitored for vegetative growth, vine size and microclimate of treatments. Sunlight intensity measurements of the vine canopy in the cluster zone will be taken for all treatments concurrently. Vines will be monitored for photosynthetic efficiency. Vine microclimate will be monitored for light spectral quality and temperature throughout the season. At the end of the season, cluster weights and berry weights will be obtained to determine any treatment effects on fruit size. Shoot number per vine and cluster per shoot will be recorded during the growing season. Documents Grant with Oregon State University. Formerly 5358-12210-003-14G (8/2011).

Last Modified: 7/22/2014
Footer Content Back to Top of Page