Abstract:
The present study was conducted in net house of Sher-e-Bangla Agricultural
University during July to December 2018 to understand the role of biochar under
Lead (Pb) stress condition. Different levels of lead chloride(PbCl
2
) (0, 75 and 150 mg
kg
‒1
) was applied to understand the effect of Pb on T. amanrice (BRRI Dhan62) and
different doses of biochar (0, 2, 4 and 6 t ha
‒1
) was applied for reducing Pb toxicity in
rice plant. This experiment was laid out in completely randomized design with four
replications. Exposure of Pd decreased growth of aman rice by decreasing plant
height, tiller number, leaf number, leaf area index, root length and root weight.
External application of 75 and 150 mg kg
‒1
of PbCl
2
decreased effective tillers (12 and
25%, respectively), number of grain (8 and 21%, respectively), grain yield (12 and
30%, respectively) and straw yield (4 and 12%, respectively). Addition of different
doses of biochar influenced growth and yield attributes. Growth and yield of rice
increased with increasing the doses of biochar upto a certain extent (4 t ha
).
Application of 4 t ha
‒1
of biochar in amanrice increased grain yield by 15%. However,
application of different doses of biochar have no impact on riceunder Pb stress
conditions.
Description:
A Thesis
Submitted to the Department of Agronomy, Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka in partial
fulfillment of the requirement for the degree of
MASTER OF SCIENCE (MS)
IN
AGRONOMY
