Centre Projects
Influence of crop load on yield and quality parameters of Sauvignon Blanc
Brief:For years the standard trellising system in Marlborough Sauvignon Blanc has been 4-cane VSP or vertical shoot positioning. Although this system is serving the Marlborough wine industry well, it is important to look at methods of improving flavour concentration and identifying with more precision what happens to vines when they get pruned differently. The VSP trellising system was used but 20, 40, 60 and 80 nodes were laid down and their phenological development was followed. By the time of flowering there was little difference between the treatments. All vines took about 14 days for flowering but the 20 node treatment was slightly ahead of the other treatments. Maturity measured as °Brix development was ahead for the 20 and 40 node treatments compared to the 60 and 80 node treatments. There was a linear relationship between node number and yield and an inverse relationship between node number and blind nodes.
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