Investigations on Seed Dropping and Biofertilizer and Calcium Seed Treatments on Crop Growth, Seed Yield, Quality and Storability of Soybean Varieties
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Date
2011
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UAS, Dharwad
Abstract
Two field and laboratory experiments were conducted to find out the effect of
manual seed dropping heights and seed treatment with biofertilizers and calcium salts
on crop growth, seed yield, quality and storability in soybean varieties in Department
of Seed Science and Technology, University of Agricultural Sciences, Dharwad. Field
experiment was conducted in split-split design consisted of three soybean varieties
viz., JS-335, JS-9305 and DSb-1(with three levels of seed dropping heights viz. no
dropping, six feet dropping and nine feet dropping heights and two biofertilizer seed
treatments viz. Rhizobium and Rhizobium + PSB. Among three varieties DSb-1
variety recorded higher seed yield (2106.1kg/ha), germination (91.25%), vigour index
(3746) and other seed quality parameters compared to JS-9305 and JS-335. Among
the dropping heights, higher seed yield (2160.5 kg/ha) with better seed quality traits
were recorded in the undropped seeds compared to nine feet dropped seeds. The
maximum seed yield (2024.6kg/ha) was recorded in the seed pretreated with
rhizobium+PSB compared to Rhizobium alone. The interaction between varieties,
seed dropping heights and biofertilizers was found non significant for all the test
parameters studied.
The second storage experiment was conducted with above said soybean
varieties, dropping heights and seed treatment with calcium salts (untreated control,
calcium chloride and calcium carbonate) stored under ambient conditions for 12
months period. Among varieties, DSb-1 variety recorded higher germination
(33.33%), vigour index (812) and less mechanical damage compared to JS-335 and
JS-9305 varieties at the end of 12 months storage period. The undropped seeds have
retained higher germination (70.68%), vigour index and other seed quality parameters
compared to nine feet dropped seeds during entire storage period. Among seed
treatments, calcium chloride treated seeds retained higher germination (34.27%) and
other seed quality parameters followed by calcium carbonate compared to untreated
seeds at the end of 12 month storage period.
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Keywords
Seed Science and Technology