Seed Production and Storage Studies in Onion (Allium cepa L.)
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Date
2016-06
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University of Agricultural Science, Dharwad
Abstract
The field experiment was conducted at ‘H’ Block, Seed Unit, University of Agricultural Sciences, Dharwad, during rabi, 2012 on the effect of four bulb size viz., B1 : < 30 g per bulb, B2 : 31-60 g per bulb, B3 : 61-90 g per bulb and B4 : 91-120 g per bulb and four umbel numbers viz., U1 : Two umbels per plant, U2 : Three umbels per plant, U3 : Four umbels per plant and U4 : All umbels per plant on crop growth, seed yield and quality of onion. Among the four bulb sizes, significantly more seed yield per umbel (4.05 g), seed yield per plant (12.58 g) and seed yield per ha (696.49 kg/ha) were noticed in 91-120 g per bulb (B4). Whereas net returns (3,41,142 Rs./ha) and B:C ratio (6.00) in < 30 g per bulb. Similarly two umbels per plant recorded significantly more seed yield per umbel (4.24 g) as compare to all umbels per plant. Whereas higher seed yield per plant (17.60 g), seed yield per ha (723.97 kg), net returns (3,44,086 Rs./ha) and B:C ratio (4.56) as compared to U4. Treatment combination of 91-120 g per bulb and all umbels per plant (B4xU4) recorded significantly higher seed yield per ha (762 kg/ha).
A laboratory experiment was conducted under ambient condition for ten months to study the seed storability of onion. The results revealed that the seeds produced from 91-120 g per bulbs maintained higher seed germination (59.02 %), vigour index (759), lower electrical conductivity (1.244 dSm-1) and 1000 seed weight (3.80g) at the end of ten month of storage period as compared to B1. The higher seed germination (59.06 %), vigour index (774), lower electrical conductivity (1.216 dSm-1) and 1000 seed weight (3.97 g) was obtained from two umbels per plant (U1).