RESPONSE OF MUSTARD VARIETIES TO SALICYLIC ACID

Abstract

The experiment was conducted during the period from November 2014 to March 2015 in the experimental field of Sher-e-Bangla Agricultural University, Sher-e- Bangla Nagar, Dhaka to evaluate effort of varieties and salicylic acid(SA) on morphophysiology and yield of mustard. The experiment was laid out in two factors Randomized Complete Block Design (RCBD). Factor A: Mustard varieties (5 varieties)- V1: Tori 7, V2: BARI Sarisha 13, V3: BARI Sarisha 14 and V4: BARI Sarisha 15, V5: BARI Sarisha 16. Factors B: Levels of salicylic acid (3 levels)- S0: 0 mM SA (control), S1: 0.2 mM SA, S2: 0.4 mM SA; It replicated three times. The total treatment combinations were 15(5×3). Most of the results of this experiment showed differences to the treatments. The variety showed significant variation on morphophysiology, yield contributing characters and yield of mustard. The highest plant height, leaf number and number of branches per plant were found in V5(BARI Sarisha 16). The lowest transpirational water loss(%) was recorded in V5. Due to different mustard varieties, the highest number of siliqua per plant (185.23), the highest length of siliqua (6.89 cm), the highest seed yield (2.15 t/ha) and the highest stover yield (3.08 t/ha) was observed from V5, whereas the lowest number (85.00), the lowest length of siliqua (4.62 cm), the lowest seed yield (1.18 t/ha) and the lowest stover yield (2.24 t/ha) was found from V2.The salicylic acid also improved the morphophysiology and yield contributing characters. The salicylic acid showed significant reduction of days required to flowering and harvesting. The highest number of siliqua per plant (113.88), the highest length of siliqua (6.16 cm), the highest seed yield (1.74 t/ha) and the highest stover yield (2.85 t/ha) was found from S2, while the lowest number (107.78), the lowest length of siliqua (5.58 cm), the lowest seed yield (1.47 t/ha) and the lowest stover yield (2.64 t/ha) was observed from S0. For the interaction effect of mustard varieties and levels of salicylic acid, the highest number of siliqua per plant (192.23), highest length of siliqua (7.33 cm), the highest seed yield (2.30 t/ha) and the highest stover yield (3.37 t/ha) was observed from S2V5 and the lowest number of siliqua per plant (73.33), the lowest seed yield (1.01 t/ha) and the lowest stover yield (2.20 t/ha) and from S0V4 treatment combination. Therefore, this experiment result suggested that, exogenous salicylic acid improve the mustard seed yield by changing the morphophysiology and yield contributing characters different mustard varieties.