Abstract:
The experiment was conducted during the period from November 2020 to March
2021 to study the effect of different amounts and combinations of substrates on
the productivity, contamination and cost benefit ratio of oyster mushroom
(Pleurotus ostreatus). The experiment was conducted with fifteen (15) different
type treatments which were controlled amount of waste paper alone and
combinations of waste paper and sawdust with three replications to achieve the
desire objectives. The experiment was laid out in single factor Completely
Randomized Design (CRD).Highest mycelium running rate (0.97 cm/day) was
recorded in T
2
=500 g waste paper. The lowest harvesting period (39.33 days)
was recorded in T
1
=250 g waste paper and T
2
=500g waste paper. Maximum
average number of primordia and fruiting body per packet (59.33) was observed
from T
10
=1500 g(75%Waste paper + 25% Sawdust) but the highest number of
effective fruiting body per packet (18.67) was recorded from T
15
=1500g (25%
Waste paper + 75% Sawdust). T
15
=1500g (25% Waste paper + 75% Sawdust)
provided with the highest biological yield (165.33 g), economic yield (162 g),
dry yield (11.44 g) and net returns (34.6 TK) but the highest of biological
efficiency (44.93%) was observed when 75% of waste paper was added to 25%
of sawdust to prepare 250g substrate. Trichoderma sp., Penecillium sp.,
Rhizopus stolonifer and Aspergillus niger were isolated and identified from
contaminated substrates. Contamination severity was highest in T
15
=1500g
(25%Waste paper + 75%Sawdust) and it increased with the increase of days after
incubation. Among all the treatments, T
15
=1500 g (25%Waste paper +
75%Sawdust) was better economically as well as showed the best yield
performance for the cultivation of oyster mushroom.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
In partial fulfillment of the requirements for the degree
of
MASTER OF SCIENCE
IN
PLANT PATHOLOGY
