Abstract
Four organic substrates; Mahogany Sawdust (MSD), Corn Cobs (CC), Oil Palm Fruit Fibre (OPFF) and Rice Bran (RB) were evaluated for their effects on growth and yield of Pleurotus ostreatus (Jacq.Fr.) Kumm. The completely randomized experimental design was adopted for the study with 4 treatments replicated 10 times. Results on mean number of days for spawn run, primordial formation and formation of fruit body were 19.90±0.28(CC)-25.20±0.29(MSD), 45.10±0.28(CC)-47.90±0.23(MSD) and 56.50±0.22(CC)-59.40±0.27(MSD), respectively. Similarly, height of stipe, diameter of stipe and diameter of pileus ranges were 3.28±0.13 (MSD)-3.51±0.06 (RB),1.26±0.06 (OPFF)-1.39±0.05(RB) and 4.08±0.05(CC)-4.70±0.04(OPFF), respectively. Fresh weights (g), dry weights (g) and biological efficiency were 10.20±0.31(OPFF)-11.05±0.14(MSD), 3.18±0.15(CC)-3.38±0.13(RB) and 4.14±0.14 (OPPF)-4.42±0.06(MSD), respectively. Results on mushroom growth showed that CC took the least duration for full mycelial colonization and the longest duration occurred on MSD. There were significant differences (P ≤ 0.05) between the durations required for primordia formation among the four organic substrates. The results on mushroom yield showed that mean fresh weights of harvested mushrooms varied from 10.20±0.31 g on OPFF to 11.05±0.14 g on MSD. There were no significant differences (P ≥ 0.05) in the biological efficiency of mushrooms grown on MSD, CC and OPFF substrates. Considering the growth and yield attributes RB was observed to be the best substrate and could be used for commercial production of P. ostreatus among the various organic substrates used in this study.
Highlights
The experimental design used for the study on the four substrates Mahogany sawdust (MSD), Corn cobs (CC), Rice bran (RB) and Oil palm fruit fibre (OPFF)) was the completely randomized design (CRD) in ten replications
The proximate chemical compositions of various substrates, mahogany sawdust (MSD), Corn Cobs (CC), OPPF and Rice Bran (RB) used in this work revealed the presence of cellulose, hemicelluloses, lignin, carbon and nitrogen in all the substrates (Table 1).The highest cellulose composition was produced by Oil Palm Fruit Fibre (OPFF) (54.88%) while RB (51.36%) contained the least
The carbon content was highest in MSD (48.67%) while that of RB (38.40%) was the least
Summary
Kumm (family Pleurotaceae) has its origin from China but of worldwide importance (Wojewoda, 2003). It grows on logs of wood and branches of trees such as, common walnut, birch-tree, hornbeam, willow, poplar, beech and palm trees. Second behind Agaricus bisporus as the most economically important cultivated edible mushroom (Sanches, 2010). Pleurotus ostreatus (oyster mushroom) has versatile ability to degrade ligno-cellulosic biomass of plant wastes and utilize them for growth and development
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