The effects of seven substrates for the cultivation, yield
and protein content of the mushroom, Pleurotus
tuberregium (Fries) Singer were investigated. The
experimental design used was completely randomized design (CRD)
of 7 treatments and 10 replicates. The highest fresh weight
yield was obtained from mushrooms grown in river sand and
sawdust mixture (T6) while the least was from those grown in
top soil mixed with sawdust (T4). Oil palm fruit fibre (OPFF)
substrate (T3) produced no fruit bodies at all. Protein
analysis of the mushrooms revealed that those grown in river
sand alone (T1) had the highest protein content while fruit
bodies harvested from sawdust substrate alone (T2) had the
least protein content. River sand plus sawdust substrate
(T6) is recommended as the best substrate for the production
of P. tuberregium in view of the fact that it
produced the highest fruit body weight and its protein
content was not significantly lower than that of river sand
alone (T2).