Abstract:
Executive Summary
A pot experiment was conducted at the rain- shelter of the Department of Agronomy, Sher-e-
Bangla Agricultural University, Dhaka to find out the arsenic stress tolerance in five mustard
varieties as influenced by phosphorous and potassium. The experiment was consisted with
three treatment factors as factor-A: variety (V
= BARI sarisha- 14 as check variety (as in a
previous experiment conducted with BARI sarisha- 11, BARI sarisha- 12, BARI sarisha- 14
and BARI sarisha- 15 under arsenic stress and gave lower percentage of yield reduction
compared to non- arsenic condition), V
2
1
= BARI sarisha- 9, V
3
= BARI sarisha- 18, V
=
BARI sarisha- 16 and V
5
= BARI sarisha- 15), factor- B: arsenic level (A
= no arsenic and
A
100
= 100 mg/kg soil As) and factor- C: PK level ( F
1
0
= recommended dose PK (P= 35.08
kg ha
-1
and K = 42.33 kg ha
-1
), F
2
= 125% recommended of PK and F
= 150%
recommended dose of PK). The experiment was laid- out in completely randomized design
with four replications. Comparing the check variety BARI sarisha-14 (V
), all the mustard
varieties studied were arsenic stress tolerance. Among the five varieties studied, BARI
sarisha- 18 (V
3,
0.09 ppm) and BARI sarisha- 15 (V
5,
1
0.05 ppm) are comparatively more safe
to consume as accumulate significantly lower amount of arsenic in seed. Application of PK
at 125% of recommended dose reduced seed arsenic content in BARI sarisha- 14 (58.1%),
BARI sarisha- 16 (58.1%) and BARI sarisha- 15 (33.3%) whereas increased in BARI
sarisha- 9 (10.5%) and kept unchanged in BARI sarisha- 18. Again, Application of PK at
150% of recommended dose reduced seed arsenic content in BARI sarisha- 14 (23.3%), in
BARI sarisha- 9 (61.9%), BARI sarisha- 16 (29.0%) and BARI sarisha- 15 (58.3%) whereas
increased in BARI sarisha- 18 (50%). Therefore, concluded that BARI sarisha- 18 and BARI
sarisha- 15 are safe to consume as they contain much lower amount of arsenic in seed and
increasing PK application upto 150% recommended dose except BARI sarisha- 18 can
reduced arsenic accumulation in seed in mustard varieties which accumulate much more
arsenic in seed under arsenic stress.
