This study evaluated precocity in primordia induction and harvest initiation periods as well as the biological efficiency of heat-resistant hybrid strains of Pleurotus ostreatus using coconut-husk sawdust supplemented with wheat and/or rice bran as an alternative substrate for axenic production of edible mushrooms. The growth rate, vigor, period of primordia formation, harvest initiation period and biological efficiency of three P. ostreatus strains were evaluated in response to the supplementation of the coconut-husk sawdust based substrate with 0, 5, 20, 30 and 40% of wheat and/or rice bran. The supplementation the coconut-husk sawdust with wheat and/or rice bran reduced the C:N rate in comparison with the control group, and increased growth rate, mycelial vigor, precocity of primordia formation and the harvest period, as well as biological efficiency in all strains tested. Among the tested strains, EF60 and POSB were the most precocious in their primordia induction and harvest periods, and were also more biologically efficient than strain DF39.
Edible mushrooms; agricultural waste; mushroom production