Studies on improvement of shelf life in onion (Allium cepa L.) var.Arka kalyam
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Date
2010
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UAS, Dharwad
Abstract
The field experiment was conducted at MARS, UAS, Dharwad during kharif 2009 to
study the effect of different sources of organics, fertilizers and chemical spray on growth and
storage life of onion (Allium cepa L.) var. Arka Kalyani. The experiment consisted of main
plot treatments - chemical spray, sub plot treatments – organics and sub-sub plot treatments -
fertilizers. The experiment was laid out in split-split plot design with three replications. The
plant morphophysical characters were recorded at various stages of growth.
Significant influence on all growth parameters like plant height, number of leaves,
root length, neck diameter, leaf dry matter and bulbs were observed with application of
Vermicompost, ammonium sulphate and SOP. Among organics, vermicompost found
superior over FYM. Among the sources of nitrogen, ammonium sulphate was found superior
to urea. Among the potassium sources, SOP was superior with respect to the yield and yield
attributing characters like fresh bulb weight, bulb diameter, bulb yield and including TSS,
rotting bulbs. Similar results were observed due to application of vermicompost and
ammonium sulphate as a nitrogen source. Different sources of organics, potassium and
nitrogen influenced the shelf life of onion during storage. Potassium sources were nonsignificant
with respect to storage loss, however, TSS was higher in SOP than MOP. Among
different nitrogen sources, urea showed highest storage losses due to rotting and sprouting as
compared to ammonium sulphate. Whereas, TSS were highest in ammonium sulphate as
compared to urea.
The morphological characters like plant height, number of leaves, neck diameter, root
length, leaf dry matter and bulbs were higher in treatments with application of vermicompost,
SOP and ammonium sulphate. Similarly, shelf life of onion was enhanced in these treatments.
Chemical spray did not influence growth parameters significantly.
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Crop Physiology