M. M. HOSSAIN1*, G. K. M. M. RAHMAN2, M. A. M. AKANDA3, A. R. M. SOLAIMAN4 and M. T. ISLAM5
1Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka, 2&4Department of Soil Science, 3Department of Plant Pathology and 5Department of Biotechnology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh. *Corresponding author’s Email: soilsaudhaka@yahoo.com
ABSTRACT
A pot-culture experiment was conducted with BRRI dhan45 (Oryza sativa L.) in arsenic (As) amended soil (0, 1.0, 5.0, 10.0, 20.0, 30.0, 40.0 and 50.0 mg kg-1As) in Bangladesh. Experimental results revealed that addition of As to soil affected plant height, tiller and panicle numbers, grain and straw yield of BRRI dhan45 significantly (p ≤ 0.05). Plant height and straw yield was reduced significantly at low level of As in soil (1.0 mg kg-1) but grain yield was not affected up to 5.0 mg kg-1 As treatment. In 50 mg kg-1 As treatment, grain and straw yield was found to reduce 93.1% and 77.2%, respectively as compared to control. A high grain As uptake (1.29 to 1.62 mg kg-1 As dry weight) was observed in the treatments of 30-50 mg kg-1 As containing soil. These levels exceed the food hygiene concentration limit of 1.0 mg kg-1 As. However, the straw As uptake varied significantly (p ≤ 0.05) from a low concentration of As in soil (5 mg kg-1) and the highest up take (2.26 mg kg-1 As) was noticed in 20 mg kg-1 As treatment, and later the accumulation was found to decline.
Keywords: Arsenic, Rice, Growth, Grain, Straw and Soil.