Abstract:
The experiment was conducted in the field of Sher-e-Bangla Agricultural
University, Dhaka, Bangladesh during the period from November 2008 to
February 2009 to find out the effect of phosphorus and plant spacing on the
growth and yield of lettuce. The experiment consisted of two factors, such as
factor A: 4 levels of phosphorus Po: 0 kg P20slha; P1: 24 kg P205/ha; P2: 48 kg
P20s/ha and P3: 72 kg P20s/ha; factor B: 3 levels of plant spacing; S1: 40 x 20
c111, S2: 40 x 25 cm; S3: 40 x 30 cm. The experiment was laid out in a
Randomized Complete Block Design with three replications. Data on growth,
yield contributing characteristics and yield were recorded. At 30, 40, 50 and 60
DAT all the highest value of growth parameter and the yield per hectare (5.31
ton, 6.03 ton, 6.61 ton and 7.06 ton) was recorded from P3. At 30, 40, 50 and
60 DAT the tallest plant was recorded from S1, maximum number of leaves per
plant was recorded from ,S2 and the highest yield per hectare ( 4.58 ton, 5.33 ton,
6.07 ton and '6.51 ton) was observed from S2. At 30, 40, 50 and 60 DAT
highest value for plant height was recorded from P3S1 and maximum number of
leaves per plant was found from the treatment combination of P3S2. The highest
yield per hectare (5.95 ton, 6.49 ton, 7.26 ton and 7.68 ton) and the highest
benefit cost ratio (2.,08) was recorded from P3S2 and the lowest was observed
from P0S3 respectively. So the best results were obtained from the treatment
receiving 72 kg P20sfha with plant spacing 40 x 25 cm.
