EFFECT OF BUNCH LOAD ON THE QUALITY OF CARDINAL GRAPE VARIETY
Journal
The Journal "Agriculture and Forestry"
Date Issued
2021-12-15
Author(s)
PRCULOVSKI, Zlatko
PETKOV, Mihail
BOSKOV, Krum
KRYEZIU, Sami
DOI
10.17707/agricultforest.67.4.10
Abstract
Our research aims to evaluate the effect of bunch load variation per unit
area on the quality of Cardinal table grape variety. The experiments were carried
out during three vegetation seasons (2014 – 2016) on Cardinal grape variety
grown on pergola training system, with a planting distance of 2.5 m x 2.5 m, in
Gevgelija-Valandovo vine growing region, the Republic of Macedonia. After the
blooming phenophase, the number of bunches (crop load) was reduced. Three
bunch thinning variants were applied: V1 (thinning to 3 bunches/m2
), V2 (thinning
to 4 bunches/m2
) and V3 (thinning to 5 bunches/m2
). They were then compared
with the standard (ST) where no thinning of bunches was applied.
Research results show that bunch load in Cardinal variety has a significant
impact on bunch and berry mass, transportability, maturation dynamics and
packed grape quantity and that the V1 variant, with the lowest bunch density per
m
2
, has the largest individual bunch and berry mass (502.3 g and 8.83 g
respectively), while the ST variant yielded the smallest bunch and berry mass
(451.7 g and 7.93 g respectively). We got similar results on grape transportability
marked by berry firmness and berry adherence strength. The largest quantity of
total harvested grapes was obtained in the V3 (2.22 kg/m2
) and ST (2.19 kg/m2
)
variants, while the smallest quantity of total harvested grapes (1.47 kg/m2
) was
obtained in the V1 variant. The largest quantity of packed grapes (1.87 kg/m2
)
was obtained in the V2 variant, and the smallest in the V1 variant (1.44 kg/m2
).
area on the quality of Cardinal table grape variety. The experiments were carried
out during three vegetation seasons (2014 – 2016) on Cardinal grape variety
grown on pergola training system, with a planting distance of 2.5 m x 2.5 m, in
Gevgelija-Valandovo vine growing region, the Republic of Macedonia. After the
blooming phenophase, the number of bunches (crop load) was reduced. Three
bunch thinning variants were applied: V1 (thinning to 3 bunches/m2
), V2 (thinning
to 4 bunches/m2
) and V3 (thinning to 5 bunches/m2
). They were then compared
with the standard (ST) where no thinning of bunches was applied.
Research results show that bunch load in Cardinal variety has a significant
impact on bunch and berry mass, transportability, maturation dynamics and
packed grape quantity and that the V1 variant, with the lowest bunch density per
m
2
, has the largest individual bunch and berry mass (502.3 g and 8.83 g
respectively), while the ST variant yielded the smallest bunch and berry mass
(451.7 g and 7.93 g respectively). We got similar results on grape transportability
marked by berry firmness and berry adherence strength. The largest quantity of
total harvested grapes was obtained in the V3 (2.22 kg/m2
) and ST (2.19 kg/m2
)
variants, while the smallest quantity of total harvested grapes (1.47 kg/m2
) was
obtained in the V1 variant. The largest quantity of packed grapes (1.87 kg/m2
)
was obtained in the V2 variant, and the smallest in the V1 variant (1.44 kg/m2
).
Subjects
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