Abstract:
A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka
during the period from October-2021 to February-2022 in Rabi season, to study the effect
of leaf clipping at reproductive stage on productivity under different population densities
of hybrid maize. The experiment consisted of two factors, and followed Randomized
Complete Block Design (RCBD) with three replications. Factor A: Population density (4
levels) viz: P
1
= 60 cm × 15 cm (1,10,000 plants ha
-1
), P
= 60 cm × 20 cm (83,000 plants
ha
1
-1
), P
3
= 60 cm × 25 cm (66,500 plants ha
) and Factor B: Leaf clipping (4 levels) viz: C
-1
) and P
1
4
2
= 60 cm × 30 cm (55,500 plants ha
= Control (no clipping), C
= Clipping of
uppermost 2 leaves, C
3
= Clipping of uppermost 4 leaves and C
= Clipping of uppermost
6 leaves. Experimental result revealed that, in case of different population densities of
maize, the cob length (15.64 cm), cob diameter (4.82 cm), number of rows cob
4
(4.82),
number of grains cob
-1
(385.04), grain weight plant
-1
(107.07 g) and 100-grain weight
(22.45 g) of maize were observed in P
4
(55,500 plants ha
-1
) treatment. However, the
highest grain yield of maize (8.27 t ha
-1
) was observed in P
2
2
-1
(83,000 plants ha
)
treatment. Growth and yield of maize were significantly influenced due to the effect of
leaf clipping at reproductive stage on maize. The highest cob length (15.02 cm), cob
diameter (4.69 cm), number of rows cob
-1
(14.33), number of grains cob
(352.65), grain
weight plant
-1
(98.00 g), 100-grain weight (21.97 g) and grain yield (7.44 t ha
) were
observed in C
1
(no clipping) treatment. In case of combination, the P
combination
treatment gave the highest grain yield of maize (8.53 t ha
-1
). Based on the above findings,
experimental results revealed that different population densities and leaf clipping on
maize at reproductive stage significantly influenced the growth and yield of maize.
Therefore, it was suggested that planting 83,000 plants ha
-1
along with no leaf clipping
(P
2
C
) combination treatment would help to influence plant growth and increase its
ability to give better yield production of maize.
Description:
A Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the
requirements for the degree of
MASTER OF SCIENCE
IN
AGRONOMY
