Abstract:
The experiment was conducted at the central Farm of Sher-e-Bangla
Agriculutral University, Dhaka during the period from February to July 2007
to find out the effect of spacing and potassium on the growth and yield of
summer onion. The experiment consisted with two factors. Factor A: Three
types of plant spacing; S:15cm
15cm;
Factor B: Four levels of potassium; }Cg:Okg IC
x
5cm,
S2:15cm
x
10cm, S3:I5cm
2
0Iha, K,:40kg K
20/ha,
1C2:80kg K
20/ha, K
3:120kg K
2
0fha. The experiment was laied out in
Randomized Complete Block Design (RCBD). In case of spacing highest
plant height (30.13cm), fresh weight of bulb (35.75gm), yield (11.64 tfha)
was obtained from S
2
. In case of potassium highest plant height (32.31cm),
fresh weight of bulb (39.48gm),yield (11.78 t/ha) was obtained from K
3
. In
case of combined effect highest yield (13.13 tlha) was obtained from the
treatment combination of S
2K3
. The highest net return (Tk 149,296) was
recorded from treatment combhiatio:i of S
x
2K3
and the highest benefit cost
10cm
spacing with application of 120kg K
ratio (2.33) was recorded in S
2
K;!. It may be concluded that 15cm
summer onion.
x
2
0/ha is best for growth & yield of
