EFFECT OF DIFFERENT SAWDUST SUBSTRATE ON THE GROWTH, YIELD AND PROXIMATE COMPOSITION OF OYSTER MUSHROOM (Pleurotus ostreatus)

Abstract

Five different sawdust viz, mango tree (iioiigiIèra indica). rain tree (1llbiia saman). teak tree (Tectona grandLc), mahogony tree (Su'ietenicz inahagoni) and mixture of all four sawdust supplemented with 30 % wheat bran and I % CaCO3 as basal substrate were selected for studies their performance on growth. yield and proximate composition of oyster inushrooni (Pk'urotus ostreatus). The highest mycelium running rate in spawn packet (0.72 cm/day) was found in mixture of sawdust, the maximum time from stimulation to primordial initiation (8.04 days) and time from primordial initiation to harvest (4.24 days) were recorded in mango tree sawdust. The highest number of primordial/packet (217.5). fruiting body/packet (115.5) and effective fruiting body/packet (29.02) were observed in mango tree sawdust. The highest weight of individual fruiting body (5.60 g), dry yield (35.15 g). biological yield (368.18 g) and economic yield (360.68 g) were also tbund in mango tree sawdust. The mahogany tree sawdust gave the highest moisture (89.13 %) content of oyster mushroom. This study also investigate the effect of sawdust supplements on nutritional status where the maximum amount ot'dry mailer (10.1 8°/h), amount of lipid (4.46 %) were found in mixture of sawdust. The highest amount of Fe (42.52 %) was observed in rain tree sawdust supplemented with 30% wheat bran. lie highest crude fiber (19.53 %) was recorded in mango tree sawdust supplemented with 30% wheat bran. The highest Protein (26.04 %) and Ca (30.73 %) were observed in mixture of sawdust supplemented with 30% wheat bran. Therefore. it can be concluded that mango tree sawdust supplemented with 30 % wheat bran can be further used as a better substrate for oyster mushroom PIeurotus ostreatus) production reducing cost and increasing the yield and nutritional quality.