EFFECT OF FOLIAR APPLICATION OF SALICYLIC ACID ON YIELD AND YIELD CONTRIBUTING CHARACTERS OF BRRI hybrid dhan3

Abstract

The experiment was conducted in the Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from November 2014 - April 2015 to study the effect of different levels of salicylic acid (SA) on growth and yield of BRRI hybrid dhan3.The experiment included six levels of SA viz. T 1 = 0, T 2 = 200, T 3 = 400, T 4 = 600, T = 800 and T = 1000 µM. The experiment was laid out in a randomized complete block design with three replications. The results revealed that, Lower dose of SA has a positive role on plant height of rice and higher doses up to 1000 µM have negative effect. The highest oven dry matter weight (2.7 t/ha) was found in T 6 treatment having foliar spray of SA at 400 µM and the lowest (2.0 t/ha) was found in, T 3 . The highest number of effective tillers per hill (14) was found in the treatment T 6 5 due to the application of 1000 µM SA and the highest 1000 grain weight (34.8g) was found with the same treatment. The highest number of grain per panicle (156) was found in the T treatment having foliar application of 1000 µM SA and it was statistically similar with the treatments T 6 4 and T . The application of different levels of SA had a significant effect on number of stem borer affected plants. The lowest number of affected panicle per plot (3) was found in the treatment T 5 . The maximum grain yield was found in the treatment T having 1000 µM SA and it was statistically identical with the treatment T 5 6 having 800 µM SA. On the other hand, minimum grain yield was found in the control treatment T which was similar to the treatments T 2 and T 3 1 having 200 µM and 400 µM SA, respectively. So, it can be concluded that salicylic acid may be applied as foliar application to rice crops for better growth and yield. 5 6