STANDARDIZATION OF DRYING TECHNIQUES IN CARNATION FOR VALUE ADDITION
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Date
2003
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, DHARWAD
Abstract
"Experiments were carried out at Kittur Rani Channamma College of
Horticulture Arabhavi on drying of cut carnation flowers for obtaining best
quality dry carnation flowers .Data on shade drying of flowers harvested at
different stages viz., paintbrush, cross bud and open embedded in two
different desiccants (sand, silicagel) revealed that desiccating the open
flowers in silicagel was superior with respect to colour euid texture. While
drying cross bud flowers was best with respect to shape and appearance.
Less number of days (6.13) were required to dry open flowers than
paintbrush stage flowers (8.97days). Silicagel desiccated the flowers faster
(5.4 days) than sand (10.06 days). Experiment on glycerol pretreatment
showed improvement in suppleness of dried carnation flowers. The flowers
treated with 1:1 glycerol to water for 12 hours maintained best texture,
colour, shape and appearance and was on par with the flowers treated with
1:5 glycerol to water for 24 hours In the hot air oven, cross-bud stage
flowers could be dried well at 40°C for 89.25 hours with sand desiccant.
While in the microwave, drying at medium low level for 2.5 minutes and
then at low level for 3.5 minutes produced the best quality dried flowers
when silicagel was used as desiccant. Data on comparison of different
drying methods viz., shade, sun, oven and microwave along with the two
desiccants (sand and silicagel) revealed that drying cross bud flowers in
shade for 164.67 hours and in hot air oven at 40°C for 68 hours by
embedding in silicagel can produce best quality dried carnation flowers with
respect to colour, shape, appearance and texture. Microwave drying of
flowers in either of the desiccants performed poorly inspite of retaining the
highest anthocyanin content (40.60%)."
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