Abstract:
A field experiment was conducted at the Agronomy research field of Sher-e-Bangla
Agricultural University in Dhaka from November 2019 to March 2020 to study the
influence of biochar and Potassium on the enhancement of growth and yield of
wheat (BARI Gom 31) under different irrigation regimes. In the experiment, the
treatments consisted of four doses of biochar and Potassium viz. B0K0= 5 t ha
Biochar + 0 kg ha
-1
K, B1K1= 5 t ha
-1
Biochar + 48 kg ha
-1
K, B2K2= 5 t ha
Biochar
+ 36 kg ha
-1
K, B3K3= 0 t ha
-1
Biochar + 48 kg ha
-1
K and four different irrigation
levels viz. I0 = Control, I1= Irrigation at crown root initiation stage, I2= Irrigation at
crown root initiation stage + Flowering stage, I3= Irrigation at crown root initiation
stage + Flowering stage + Grain filling stage. The experiment was laid out in 2
Factor Split Plot Design with three replications by assigning irrigation to main plot
and biochar and Potassium to sub-plots. There were 16 treatments combination. The
collected data were statistically examined to determine the effectiveness of the
treatments. Results revealed that there were significant variations among the
treatments in the most of the examined parameters. As for growth parameters, the
highest plant height (87.42 cm), no. of tillers/plant (6.60), leaf area index (42.21)
and for yield parameters, the highest ear length (17.01 cm), no. of spikelets/ear
(18.13), no. of grains/ear (37.70), 1000-grain wt. (46.66 gm), grain yield (3.53 t
1
), straw yield (3.56 t
ha
-1
) and harvest index (49.80) were recorded under I2B2K2
due to irrigation at crown root stage and flowering stage interaction with Biochar: 5
t
ha
-1
and K: 36 kg
ha
-1
. On the contrary, lowest values for above mentioned cases
were obtained with I0B0K0. The results revealed that irrigation at crown root
initiation and at flowering stage with 5 t
ha
-1
biochar and 36 kg
Potassium
enhance both growth and yield of wheat.
Description:
A Thesis
Submitted to the Department of Agronomy, Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka in partial
fulfillment of the requirement for the degree of
MASTER OF SCIENCE (MS)
IN
AGRONOMY
