Abstract:
The experiment was conducted in the Farm of Sher-e-Bangla Agricultural University,
Dhaka, Bangladesh during the period from October 2014 to February 2015 to study
effect of different levels of salicylic acid (SA) on grain yield and yield attributes of
Wheat (BARI Gom 27). The experiment was included four levels of SA viz. 0 µM,
200 µM, 500 µM and 1000 µM SA. The experiment was laid out in a randomized
complete block design with three replications and 7 treatment combinations as, T
: No
recommended irrigation + 0 µM salicylic acid, T
: recommended irrigation + 0 µM
salicylic acid, T
3
2
: No recommended irrigation + 200 µM salicylic acid, T
:
recommended irrigation + 200 µM salicylic acid, T
: No recommended irrigation +
500 µM salicylic acid, T
6
5
: recommended irrigation + 500 µM salicylic acid and T
:
recommended irrigation + 1000 µM salicylic acid. The results revealed that yield and
yield contributing characters were significantly influenced by the foliar application of
different treatments. The maximum plant height (85.17 cm) was obtained from the T4
treatment and spike length (14.80 cm) was obtained from the T7 treatment. The
maximum number of effective tillers per m
2
(297.67), maximum number of
grains/spike (42.03), maximum filled grains/spike (39.9), lowest unfilled grains/spike
(2.13), highest 1000 grain weight (56 g), highest grain yield (4.23 t/ha) and straw
yield (5.20 t/ha) were obtained from the T7 treatment. On the other hand, in all cases
minimum results were observed in the T1 treatment. The results showed that grain
yield of wheat increased with increasing level of salicylic acid up to 1000 µM.
Among the treatments having recommended irrigations (T2, T4, T6, T7), yield
increasing trend was observed with increasing the level of SA. The yield increasing
trend was also observed in the treatments having no recommended irrigations (T1, T3,
T5) and this might be due to the foliar application of SA. The above results suggest
that drought stress regulatory mechanisms could be improved in wheat through the
SA. So, it can be concluded that the recommended irrigations with foliar application
of SA could be applied to increase wheat yield.
1
4
7
Description:
A Thesis
Submitted to the Department of Soil Science
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
SOIL SCIENCE
SEMESTER: July-December, 2015
