MORPHOLOGY AND YIELD OF MUSTARD AS INFLUENCED BY DIFFERENT SOWING TIMES AND BIOSTIMULATORS

Abstract

A field experiment was carried out at Agricultural Farm, Sher-e-Bangla Agricultural University, Dhaka during the period from November 2017 to February 2018 to morphology and yield of mustard as influenced by different sowing times and biostimulators. Salicylic acid and chitosan were used as biostimulators. The experiment consisted of two factors as four different sowing times viz., 03 November (S 1 ), 08 November (S 2 ), 13 November (S 3 ), 18 November (S ) and four biostimulators viz., Control (B 0 ), 0.2 mM salicylic acid (B 1 4 ), 40 ppm chitosan (B ) and 0.2 mM salicylic acid + 40 ppm chitosan (B 3 ) The total treatment combinations were sixteen and the planting material was BARI sarisha 14. The experiment was laid out in Randomized Complete Block design (RCBD) with three replications. Experimental results showed that different sowing times had significant effect on morphology, yield contributing characters and yield parameters of mustard. The highest yield (1.48 ton ha -1 . ) was obtained from the 13 November sowing (S3) and the lowest (0.91 ton ha ) was from 8 November sowing (S2). These yield data were consistent with the following morphological and yield contributing characters of mustard such as number of branch (6.90), number of siliqua (62) and seed number per siliqua (23.17). As sowing times biostimulators also significantly influenced the morphological, yield contributing characters and yield parameters of mustard. The results revealed that biostimulators 0.2 mM salicylic acid along with 40 ppm chitosan (B3) produced the highest yield (1.42 ton hectare -1 ) and lowest (0.83 ton hectare -1 ) was from control condition (B0). The morphological and yield contributing characters like number of branch (6.32), number of siliqua (56.83), siliqua length (5.47 cm) and seed number per siliqua (22.62) was also higher at 0.2 mM salicylic acid and 40 ppm chitosan and these also consistent with the seed yield of mustard. In case of interaction effect between sowing times and biostimulators, the highest yield (1.66 ton ha ) was observed with 13 November sowing and 0.2 mM salicylic acid along with 40 ppm chitosan treatment combination and the lowest seed yield (0.90 ton /ha) was observed with 8 November sowing along with control condition. The seed yield from the lowest to highest are consistent with the several parameters of both morphological and yield contributing characters of mustard to different sowing times and biostimulators. 2 -1 -1