EFFECT OF FOLIAR APPLICATION OF SALICYLIC ACID ON YIELD AND YIELD CONTRIBUTING CHARACTERS OF BARI GOM 27

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.

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