Abstract:
A field Experiment was conducted at Bangladesh Agricultural University Farm during January 2004
to December 2005 in order to examine the adverse effect of As in rice. Boro-T, Aman-Boro-T. Aman
rice crops were grown in sequence. There were five treatments consisting of 0, I, 2 ppm As added
with irrigation water, 10 and 20 ppm As added to soil. Arsenic treatments were applied in Boro crops.
The As contamination of soil either through irrigation water or directly to soil significantly affected
the yield and yield components of Boro and T. Aman rice. Application of As added to the Boro rice
had significant residual effects on the T. Aman rice. The irrigation water and soil added As depressed
the plant height, number of tillers, filled grains panicle", 1000-grain weight, straw and grain yields of
Boro and T. Aman rice. The grain yield reduction over the cropping seasons and treatments varied
from 8.2 to 80% as compared to control treatment.
