In this study, some physical, mechanical and ripening properties
of local variety Boğazkere grape and their relationships were determined depend
on three different phenological stages and five cane internode (IN) diameters.
This research was performed at commercial vineyard in Diyarbakır province,
which is located in the southeastern part of Turkey. Cutting properties and
energy values were measured by The Lloyd LRX plus materials testing machine. In
addition to cutting properties of cane, grape berries’ include length, with,
thickness, geometric mean diameter,
sphericity, surface area, berry
detachment force (BDF), berry weight (W), berry detachment force/weight (BDF/W)
were determined.
The mean length, width and thickness values of berries were found
as 16.64 mm, 15.49 mm, and 15.42 mm, respectively. The arithmetic mean
diameter, geometric mean diameter, surface area values were not changed
statistically with phenological stages.
There were found closely relationships between ripening and
mechanical properties at different
phenological stages for grape berries. The ratio of BDF/W decreased with
phenological stages. The BDF was decreased from 2.60 N to 2.13 N, the grape
berries skin firmness decreased from 1.60 N to 0.93 N, while berries weight
increased from 2.48 g to 2.76 g with harvesting stages. Total soluble solids
content and pH values increased with phenological stages. Whereas the total
acids were slight changed and reduced from 0.413 to 0.323 % with ripening
stages.
The
phenological stages has not significant effect on the cutting properties of
cane (P >0.05). However, cutting force were found highly correlated with the
cane diameter, the significant differences were found among internodes diameter
of grape canes at a 5 % probability level. While the maximum cutting force and
energy were obtained at IN5 diameter as 600.92 N and 5.05 J, the minimum
cutting force and energy were obtained at IN1 diameter as 289 N N and 1.52 J,
respectively.
Journal Section | Articles |
---|---|
Authors | |
Publication Date | December 26, 2017 |
Published in Issue | Year 2017 Volume: 13 Issue: 1 |
Journal of Agricultural Machinery Science is a refereed scientific journal published by the Agricultural Machinery Association as 3 issues a year.