Abstract:
The experiment was conducted in Boro season, 2020-21 to compare the
performance of fortified rice variety BRRI dhan84 with non-fortified mega
variety BRRI dhan89 and suitable fertilizer combination for maximum growth
and yield. Treatments were: two rice variety viz., i) BRRI dhan84 (V
) and ii)
BRRI dhan89 (V
) in the main plot and seven different fertilizer management
viz., i) no fertilizer (F
2
1
), ii) recommended NPKS (RFD) with Zn as basal (F
),
iii) RFD + Zn as foliar spray at anthesis (F
), iv) RFD + Zn & B as foliar spray
at anthesis (F
4
3
), v) 50% RFD + 50% Cowdung as basal (F
), vi) 50% RFD +
50% Cowdung + Zn & B as basal (F
6
5
) and vii) 50% RFD + 50% Cowdung as
basal + Zn & B as foliar at anthesis (F
) in the sub-plot. The experiment was
laid out in a Split-plot design having 3 replications. No significant variations
observed between the two varieties for almost all the studied characters except
filled grains panicle
-1
7
where the variety BRRI dhan89 showed higher number of
grains panicles
-1
(116.14) than the other variety. RFD with foliar application of
zinc and born (F
) gave the highest plant height at harvest (102.54 cm),
effective tillers hill
4
-1
(12.83) that similar (13.00) with F
(RFD with Zn as
basal), panicle length (25.91 cm), 1000-grain weight (23.58 g), grain yield
(7.67 t ha
-1
), biological yield (14.85 t ha
-1
2
) and harvest index (51.69%).
Irrespective of varieties, F
resulted superior response for almost all the studied
parameters. Foliar application of zinc and boron at anthesis (F
4
) along with
RFD increased 8.79 and 27.45% yield in BRRI dhan89 compared to that of
RFD with Zn as foliar (F
3
) and RFD with Zn and B basal (F
) application,
respectively that was 17.11 and 26.77% for the other fortified rice variety
BRRI dhan84. Foliar application of Zn and B along with recommended doses
of NPKS can be recommended for Boro rice cultivation.
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
