YIELD RESPONSE OF WHEAT AS
AFFECTED BY IRRIGATION AND POTASSIUM FERTILIZER
Md. Samsujjoha
Chowdhury, Mahmuda Motmainna, Md. Mahfuzar Rahman,
Md. Ahsan Habib and Md. Abdullahil Baque*
*Corresponding Author email: bellah_77@yahoo.com
Abstract
The study
was conducted in the experimental field of Sher-e-Bangla Agricultural
University, Dhaka,
Bangladesh during from November 2012
to March 2013. The experiment comprised of two factors-
Factor A: Irrigation, I0: No irrigation i.e. control; I1:
Irrigation at 20 DAS (crown root initiation stage); I2: Irrigation
at 55 DAS (flowering stage) and I3: Irrigation at 20, 55 and 75 DAS
(crown root initiation stage, flowering stage and grain filling stage) and
Factor B: Level of potassium fertilizer, K0: 0 kg K2O ha-1,
K1: 50 kg K2O ha-1 and K2: 100 kg K2O
ha-1. The irrigation levels I1, I2 and I3
were at par and had significantly higher values in number of spikes per hill,
number of spikelets per spike, spike length, 1000 seed weight, straw yield and
grain yield as compared to the control. Likewise application of both the doses
of potassium (K1 and K2) were at par and showed significantly
higher values in number of spikes per hill, number of spikelets per spike,
spike length, 1000 seed weight, straw yield and grain yield than the control. Both
the factors had significant effect on spike length, number of filled grains per
spike, grain yield and straw yield. The interaction treatment I3K1
and I3K2 were at par showing significantly the higher number of spike per hill, number of
spikelets per spike, filled grains per spike and grain yield per hectare, straw
yields although the longest spike (19.60 cm), highest filled grains spike-1
(34.83). grain yield (3.79 t ha-1), straw yield (6.09 t ha-1)
and biological yield (9.88 ha-1) was observed from I3K2.
On the other hand, the shortest spike (13.80 cm) was recorded from I0K0.
Significantly the lowest number of filled grains spike-1 (23.33),
grain yield (2.04 t ha-1), straw yield (3.77 t ha-1) and
biological yield (5.81 ha-1) was recorded from I2K0.
Keywords: Wheat,
Irrigation, Potassium fertilizer, Growth and Yield.
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