Studies on curing and storage of Onion (Allium cepa L.)
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Date
2011-06
Authors
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Publisher
University of Horticultural Sciences, Bagalkot. (KRC College of Horticulture, Arabhavi).
Abstract
An investigation on studies on curing and storage of onion was carried out at the
Department of Post harvest Technology, Kittur Rani Channamma College of Horticulture,
Arabhavi during 2010-2011.
Among the different curing methods, the onion bulbs cured under 35 per cent shade
with foliage gave good results with respect to both physical and chemical parameters. The
time taken for curing of onion bulbs in 35 per cent shade was about 264 hours. The bulbs
cured under 35 per cent shade showed minimum physiological loss in weight (15.21%),
sprouting (14.09%), rotting (9.22%), black mould incidence (4.16%), per cent loss of scales
(14.24%), dry matter (12.85%) and maximum moisture (87.15%), hardness (9.84 kg/cm2
),
ascorbic acid retention (7.45 mg/100g), total soluble solids (14.22%) and total sugars (7.92%)
after 60 days of storage. The highest per cent of marketable bulbs (61.48%) was also observed
in the same treatment in cv. Bellary Red after 60 days of storage which was followed by the
bulbs cured under 35 per cent shade without foliage.
Among the different storage methods, the onion bulbs stored under bamboo battens
storage structure with AC sheet roofing with bottom and side ventilation gave good results
with respect to both physical and chemical parameters. They showed minimum physiological
loss in weight (9.86%), rotting (4.20%), black mould incidence (3.50%), dry matter (15.44%),
per cent loss of scales (13.08%) and maximum moisture content (84.56%), hardness (13.28
kg/cm2
), total soluble solids (16.20%), ascorbic acid retention (8.48mg/100g) and total sugars
(12.00%) after 90 days of storage. The highest per cent marketable bulbs (85.94%) was also
observed in bulbs stored under bamboo battens storage structure with AC sheet roofing with
bottom and side ventilation in cv. Agri Found Light Red after 90 days of storage.
Among the different storage conditions the highest net returns (Rs. 395.78) and
highest return per rupee spent (1.62) was found in the bulbs stored under bamboo battens with
AC sheet roofing and with bottom and side ventilation followed by bulbs stored under
galmenium sheet roofing and mangalore tile roofing