Abstract:
An experiment was conducted at the Horticulture Farm of Sher-e-Bangla
Agricultural University, Dhaka during October 2014 to April 2015. There were
four levels of age of seedling viz. T
1
= 30, T
2
= 40, T
3
= 50 and T
4
= 60 days old
seedling, respectively. Three levels of plants per hill viz. P
1
= one, P
2
= two and
P
3
= three plants/hill, respectively. The experiment was laid out in Randomized
Complete Block Design with 3 replications. The age of seedling and number of
plants/hill showed significantly influenced the growth, yield components and yield
of onion bulb. T
3
treatment gave the maximum value for different growth and
yield parameter and produced the maximum yield of bulbs of onion (8.82 t/ha).
The highest yield of onion (8.45 t/ha) was produced by P
2
treatment and the lowest
yield (6.92 t/ha) was at P
1
treatment. The combined effect of age of seedling and
number of plants/hill demonstrated a significant variation in fresh weight of bulb
(ranging from 68.25 g to 48.82 g) and yield (ranging from 5.52 to 9.40 t/ha). The
highest yield was (9.40 t/ha) found at T
3
P
2
treatment. The treatment T
3
increased
the total yield and gave the highest gross return (Tk. 4,23,000/ha) and net (Tk.
2,66,984/ha) returns with the highest profit (BCR value of 2.71) compared with
the rest of the treatment combinations. From growth, yield and economic point of
view, it is apparent that T
3
P
2
treatment was suitable for onion cultivation.
