ARSENIC STRESS TOLERANCE IN FOUR MUSTARD VARIETIES

Abstract

A pot experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka during November, 2019 to February, 2020, to investigate the effect of arsenic stress tolerance of four mustard varieties. The experiment consisted of two factors, and followed Randomized complete block design (RCBD) with five replications. Factor A: Mustard varieties (4) viz; V 1 =BARI Sarisha-11, V ii 2 =BARI Sarisha-12, V =BARI Sarisha-14 and V =No As (Control), A 4 = BARI Sarisha-15 and Factor B: Different arsenic level (3) viz; A 1 = 50 mg As kg -1 soil and A 2 = 100 mg As kg soil. Data on different parameters were collected for assessing results for this experiment and showed significant variation in respect of growth, yield and yield contributing characteristics of mustard due to the effect of different mustard varieties, arsenic level and their combinations. Among the mustard varieties, BARI Sarisha-11 variety recorded the maximum number of siliquae plant -1 (86.35), 1000 seeds weight (3.53 g), seed yield plant -1 (3.55 g), stover yield plant -1 (15.13 g) and harvest index (18.98 %). Among the arsenic levels, 0 ppm arsenic treated plants recorded the maximum number of branches plant -1 (4.18), number of siliquaee plant -1 (69.97), number of seeds siliquaee -1 (17.37), 1000 seeds weight (3.39 g), seed yield plant (2.64 g), stover yield plant -1 (13.4 g) and harvest index (16.55 %), which were gradually decreased with the increasing arsenic level. In case of combined effect, cultivation of BARI Sarisha-11 alone with different arsenic level gave higher seed yield ranges between (3.82-3.07 g) from 0-100 ppm arsenic level and perform well in case of seed production comparable to other treatment combination and suitable for cultivation of mustard in arsenic prone areas comparable to other varieties.