Abstract:
A Thesis Submitted to
The Department of Agronomy, Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfilment of the requirements
for the degree of
MASTERS OF SCIENCE (MS)
IN
AGRONOMY
Description:
A field experiment was conducted at Sher-e-Bangla Agricultural University Farm SAU,
Dhaka during the period from October- 2020 to February-2021 in Rabi season to
studying allometry and yield components of white maize to varying levels of spacing and
fertilizer application. The experiment was consisted of two factors and followed split plot
design with three replications. Factor A: Fertilizer application rate (4) viz, F
= 50 %
recommended dose of fertilizer, F
2
=
75 % recommended dose of fertilizer, F
= 100 %
recommended dose of fertilizer, F
= 125 % recommended dose of fertilizer, Factor B:
Different spacings (3) viz, S
1
4
= 50 cm × 20 cm, S
2
=
40 cm × 20 cm and S
= 30 cm × 20
cm. The experimental results revealed that different fertilizer dose, spacings and their
combination significantly influenced the growth, yield contributing characteristics and
yield of white maize. In case of different dose of fertilizer application, the F
treatment
recorded the highest grain yield (11.96 t ha
-1
), stover yield (15.40 t ha
-1
), biological yield
(27.36 t ha
-1
) and harvest (43.67 %) comparable to other treatments. In case of different
spacing the highest grain yield (12.05 t ha
-1
), stover yield (14.77 t ha
-1
), biological yield
(26.82 t ha
-1
) and harvest (44.99 %) were observed in S
treatment. In case of combined
effect, the F
4
S
2
3
treatment combination had the highest grain yield (12.90 t ha
) followed
by F
4
S
3
(12.65 t ha
-1
) treatment combination. Components dry matter (root, stem and
leaf) had positive correlations with the total dry matter accumulations. The total dry
matter accumulation had strongest correlation with leaf area at 40 DAS. The exponential
trend of dry matter accumulation of the treatment combinations with time largely
followed that of the spacing treatments.
