EFFECT OF STEAM PASTEURIZATION OF SUBSTRATE ON GROWTH AND YIELD CONTRIBUTING CHARACTERS OF OYSTER MUSHROOM (PLEUROTUS OSTREATUS)
Authors: K.
Akhter* and M. Salahuddin M. Chowdhury
*Corresponding author: khadijaakhter@ymail.com
Abstract
The
experiment was conducted to study the effect of the varying periods of steam
pasteurization (2, 3, 4 and 5 hours plus pasteurization in autoclave) along
with without pasturization. of substrate on the growth and yield characters of
oyster (Pleurotus ostreatus) mushroom
at Sher-e-Bangla Agricultural University Mushroom Culture House, during
January, 2015 to April, 2015. The growth and yield contributing characters of
mushroom were significantly influenced by time duration of pasteurization of
substrate. Minimum mycelium running time (7.0 days) was required in autoclaved
spawn packets. The highest growth rate (0.96 cm/day) was observed in 3 hours
steam treated packets which was statistically similar to autoclaved packets,
the lowest time (3 days) required for primordia formation, the minimum days (5 days) required
for primordia formation to first harvesting, the highest number of primordia
was observed in three (3) hours steam pasteurized packets of
mushroom. The maximum duration was required (46 days) for total harvesting
after stimulation in autoclave sterilized packets. Significantly the highest
number of fruiting bodies (49.40) per packet was harvested from five hours
steam pasteurized packets. The highest diameter (8.16 cm) of pelius was
observed in steam from 3 hours packets and the lowest average length (1.82 cm)
of stipe was recorded in autoclaved packets. On the other hand, maximum time (29.00
days) was required for completion of mycelium running, the lowest mycelium run
rate (0.36 cm), the highest days required from stimulation to primordia
initiation (10.00 days), the lowest number of primordia (23.60), the
lowest number of fruiting bodies (20.40)
were observed in unpasteurized packets (control). Steam pasteurization for
three hours as well as sterilization of substrate by autoclave gave the better
performance among the treatments.
Key
word: Oyster mushroom, steam pasteurization,
substrate, growth attributes, yield attributes
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