Akademik Veri Yönetim Sistemi
13th Cukurova International Scientific Researches Conference , Adana, Türkiye, 1 - 03 Eylül 2024
Monitoring maturity
indices values is accepted as an essential criterion for determining the
harvest time of table grapes. In this study, all treatments were carried out in
two different phenological periods: berry set (T) and veraison (B). Treatments
were administered to the Cardinal (Vitis vinifera L.) grape variety,
including control (K), leaf removal (TY and BY), and leaf removal with shading
covers together (TYG and BYG).
All leaf removal
treatments were carried out in the cluster zone, and green net cover with a 55%
shading rate was used in shading treatments. 27, 34, 41, 55, 62, 68, and 74
days after the flowering date, total soluble solids (TSS, %), pH, and
titratable acidity (TA, g.l-1) amounts were measured in grape musts
periodically, and maturity indices (TSS/TA) values were calculated. Furthermore,
changes in berry weight (g) values were assessed about the treatments.
The obtained data were
subjected to variance analysis (ANOVA), and the means were compared using
Duncan's Multiple Range Test at a significance level of 5%. In this study, the
treatments had no statistically significant effects on TSS and pH values when
the TSS value exceeded 16.0% in all research subjects on the 74th
day. However, the highest TA values were obtained in K (3.80 g.l-1)
and BYG (3.72 g.l-1) treatments. The highest maturity indices values
were obtained in TY (54.39), TYG (49.89), and BY (47.88) treatments,
respectively. In contrast, the lowest values were determined in BYG (45.29) and
K (44.14) treatments. The highest values in terms of berry weights were
determined in K (7.41 g), BY (7.41 g), and BYG (7.31 g) treatments.
It was determined that
leaf removal treatments in the cluster zone during the berry set period might
cause low berry weight values despite obtaining high maturity indices values in
Cardinal grape variety during harvest.