Abstract:
Drought stress is one of the major threat of agricultural production. A pot
experiment with organic amendments was conveyed at the experimental net
house of the Department of Agronomy, Sher-e Bangla Agricultural University,
Dhaka from November-February, 2018 to investigate the effect of drought stress
on the growth, physiology and yield and the mollification capacity of drought in
wheat using organic amendments. The experiment was carried out by BARI
gom-26 and treatments were well-watered, water deficit and organic
amendments viz. control (C), compost (CO) @10 t ha
-1
, vermicompost (VC) @
10 t ha
-1
, poultry manure (PM)
@10 t ha
-1
, biochar (B) @ 2.5% w/w soil and
chitosan (CH) @ 1% w/w soil. Drought stress reduced germination 7.48%, plant
height 15.02%, SPAD value 15.91%, relative water content 13.44%, number of
spikelet spike
-1
16.92%, number of grains spike
-1
11.73%, and hundred grains
weight 17.83%. Application of organic amendments acts as a protectant and
reduces drought stress condition and in most cases it enhanced above these
growth, physiological, yield and yield attributes. Germination enhanced 11.82
% by compost application, SPAD value enhanced 17.52% by vermicompost,
Plant height increased 16.01% by poultry manure, number of spikelets spike
enhanced 19.92% by vermicompost,
number of
grains spike
-1
increased 16.62%
by vermicompost application than control under drought condition. Organic
amendments prevents the production of reactive oxygen species and
consequently prevents from oxidative stress. So, the present study concluded that
organic amendments played significant role to alleviate drought and among these
vermicompost performed better.
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
