EFFECT OF SEED INVIGORATION TREATMENTS ON FIELD PERFORMANCE AND STORABILITY OF AGED SEED OF GREENGRAM [Vigna radiata (L.) Wilczek]
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Date
2017
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Acharya N.G. Ranga Agricultural University
Abstract
The present investigation entitled “Effect of seed invigoration treatments on
field performance and storability of aged seed of greengram [Vigna radiata (L.)
Wilczek]” was carried out at Agricultural Research Station (ARS),
Jangamaheswarapuram, Guntur (field studies) and Department of Seed Science and
Technology, Advanced Post Graduate Centre, Lam, Guntur (storability studies)
during 2016-17.
The seed of greengram cv. LGG-460 were invigorated by the hydration
treatments viz., CaCl2 (2%), hydropriming, moringa leaf extract (5%), KNO3 (1.5%),
hydroprimed and dry dressing with thiram (0.25%). Seed were also invigorated by dry
dressing with bleaching powder (2g/kg of seed) and red chilli powder (1g/kg of seed).
The invigorated seed along with the untreated seed (control) (aged and fresh seed)
were used for both storability and field studies.
Among the invigoration treatments hydroprimed and dry dressed with thiram
exhibited the highest germination (93.7%) and field emergence (92.0%). Seed treated
with red chilli powder and bleaching powder exhibited more plant height.
Leaf area, number of leaves, number of branches were found to be superior in
seed treated with bleaching powder, red chilli powder and hydro primed and dry
dressed with thiram. However, days to 50% flowering was not influenced by the
invigoration treatments.
Treating of aged seed with bleaching powder, red chilli powder and
hydroprimed and dry dressed with thiram increased the number of pods per plant,
number of seed per plant, seed yield per plant and 100 seed weight. Shelling percent
and harvest index were also high in hydroprimed and dry dressed with thiram
treatment.
Even during storage, among all the invigoration treatments, hydroprimed and
dry dressed with thiram treatment performed well with respect to the seed quality
parameters like germination, seedling length, seedling dry weight and seedling vigour
index over the control.
Though the hydroprimed and dry dressed with thiram treatment performed
well in storage in first four months, the dry dressing treatment viz., bleaching powder
and red chilli powder treatments gave good results compared to hydration treatments
in maintaining germination percentage after six month of storage, where the
germination percentage was on par with fresh seed.
Correlation studies exhibited positive and significant association with seed
yield for all parameters except germination and plant height.
The present study proved that seed invigoration with bleaching powder @ 2
g/kg of seed, red chilli powder @ 1 g/ kg of seed and hydroprimed and dry dresssed
with thiram @ 0.25% of seed may be suggested for improvement of field performance
and storability of greengram seed.
Description
D5545
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