Volume 49 Number 1 Article 6 Pages: 31-33
Year 1995 Month 1
Title: Performance of ´Gewurztraminer` (Vitis vinifera L.) on Three Rootsystems
Authors: A.G. Reynolds and D.A. Wardle
Citation
Abstract:
'Gewurztraminer' vines on three rootsystems
[own-rooted (OR); self-grafted (GWZ); S.O.4
(SO4)] in a randomized complete block experi
ment were evaluated over a 3-year period
(1989-91) for yield components, fruit composition, and weight of cane primings.
No significant
differences in yield components or fruit composition were observed between the treatments in
1989. Weight of cane primings were also not
affected by rootsystem, and ranged from 0.93-1.20 kg/vine following the 1991 season.
Yield,
cluster weight, and berries/cluster were highest
in SO4 vines in 1990, and both the SO4 and
GWZ treatments contained highest berries/
cluster in 1991. The SO4 and GWZ treatments
were also highest in °Brix in 1990 and 1991, but
no effect of rootsystem was observed on either
TA or pH. It was considered noteworthy that
use of a rootstock had some beneficial effects
on yield and fruit composition in the absence of
biotic factors (phylloxera and nematodes), nutrient deficiencies, high pH soils or Water stress.
Use of rootstocks in areas with low phylloxera
populations may therefore be beneficial for
environmental adaptation, with potential for
attendant vine devigoration, yield increases, or
improvement in winegrape quality.
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