Abstract:
An investigation was conducted at the Horticulture Farm of Sher-e-Bangla
Agricultural University, Dhaka during the period from November 2013 to
February 2014 to study the effect of tuber size and plant growth regulators on
growth and yield of potato. The experiment consisted of 3 sizes of seed tuber (S
=
15 ± 5g, S
2
= 25 ± 5g and S
3
= 35 ± 5g tuber) and 3 levels of PGR (G
= Control,
G
1
= 100 ppm GA
3
and G
= 50 ppm BAP) thus there were 9 treatment
combinations. The two factor experiment was laid out in Randomized Complete
Block Design with three replications. Significant effect was found for different
parameters at different growth stages due to the influence of tuber size and growth
regulators. Results revealed that the tallest plant (52.2 and 53.5 cm at 60 and 75
DAS respectively) was observed from S
2
2
G
1
0
but the highest number of stem hill
was observed from S
3
G
2
. Similarly, the highest leaf area (162.9 cm
at 60 DAS
and 171.4 cm
2
75 DAS), stem diameter (0.95 cm at 60 DAS and 1.04 cm at 75
DAS), number of tuber plant
-1
(9.53), tuber weight plant
-1
(544.1 g), tuber weight
plot
-1
(6.69 kg) and tuber yield ha
-1
(30.97 t) were recorded from S
. Likewise,
the highest net assimilation rate (8.28 at 60 DAS and 10.33 at 75 DAS), highest
intercellular CO
concentration (421.7 at 60 DAS and 304.7 at 75 DAS), highest
photosynthetic active radiation (838.3 at 60 DAS and 1405 at 75 DAS) and highest
chlorophyll content (50. 34 at 60 DAS and 50.13 at 75 DAS) were measured from
S
3
G
2
2
. So, the tuber size (35 ± 5g) with 50 ppm BAP is best for potato production
among the treatments.
