-Implementation of agricultural residues for oyster mushroom culture has been accepted world-wide. In this study, we used wheat straw, barley straw, maize stem residue, and lawn residue as substrates coupled with wheat bran, rice bran and soybean powder as complements for the growth of P. florida. Wheat and barley straws which contained a high fiber and C/N ratio had the best growth period, fruiting body weight, yield, and biological efficiency. Assessment of substrate and complement combinations indicated that the lowest growth period was obtained from barley straw enriched with rice bran (24.67 day). However the highest fruiting body number (36.33), fruiting body weight (31.17 g), yield (1039 g), and biological efficiency (207.8 %) belonged to wheat straw complemented by either wheat or rice bran. In conclusion, the highest fruiting body weight, yield, and biological efficiency was achieved by implementation of composts in which high fiber substrates and complements were combined.
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