Abstract:
An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural
University, Dhaka 1207. Bangladesh during the period from November, 2020 to
March, 2021 to observe the effect of different combination of chemical fertilizers and
organic materials on the performance of rice varieties grown in boro season. The
experiment comprised two factors viz. factor A: Variety – 3; i) BRRI dhan63 (V
), ii)
BRRI dhan81 (V
2
) and BRRI hybrid5 (V
) and factor B: different combinations of
chemical fertilizers and organic materials – 5; i) Control (no fertilizer) (F
3
), ii)
chemical fertilizers T recommended dose (RDF) (F
1
), iii) Cow dung + RDF (F
), iv)
Vermicompost + RDF (F3) and v) Rice straw decomposition + RDF (F
). The
experiment was laid out following Split Plot Design with three replications. Data were
collected on different aspects of growth, yield attributes and yield of rice. Results
revealed that BRRI hybrid5 gave the highest grain yield (7.84 t ha
-1
). This may be
attributed to the highest number of effective tillers hill
-1
(11.24) and 1000 grain
weight (28.78 g) in this variety. Considering different combinations of chemical
fertilizers and organic materials, F
( rice straw decomposition + RDF) treatment was
highest grain yielder ( 7.59 t ha
-1
4
) than other combinations comprised with organic
materials and RDF which was due to the highest effective tillers plant
(11.58), grains
panicle
-1
(85.19) and 1000-grain weight (24.43 g) in this treatment. Regarding the
interaction of variety and different combinations of chemical fertilizers and organic
materials, the combination of rice variety BRRI hybrid5 x rice straw decomposition +
RDF (V
3
F
) was highest yielder among the other interactions which was attributed to
higher effective tillers hill
4
-1
(12.93) and 1000 grain weight (29.79 g). It may be
concluded from the results that for adding organic matter in rice field, rice straw
decomposition with recommended dose of chemical fertilizer (RDF) seems promising
for cultivation of boro rice.
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
