Micro and Macronutrient Properties of Pleurotus ostreatus (Jacq: Fries) Cultivated on Different Wood Substrates

The micro and macronutrient content of Pleurotus ostreatus cultivated on different woody substrates viz; Pycnanthus ongoleubis, Ceiba pentandra and Cananium sp. was investigated. Mineral analysis revealed that phosphorus had the highest value in all the minerals sampled and it value ranges between 51.97 mg/100 g to 56.77 mg/100 g while Magnesium recorded the least value of 1.69 mg/100g to 3.57 mg/100 g. Pleurotus ostreatus cultivated on woody substrate, Pycnanthus ongoleubis had higher and significantly different (P≤0.05) mineral content when compared with the other woody substrates, Ceiba pentandra and Cananium sp. The result of the proximate composition showed that Pycnanthus ongoleubis is the most suitable substrate for the cultivation of the Pleurotus mushroom based on the protein content. Amino acid analysis revealed that glutamic acid (9.01g/100 g to 10.3 g/100 g) was the most abundant amino acid in P. ostreatus. P. ostreatus cultivated on Pycnanthus ongoleubis had higher and significantly different (P≤0.05) values in all the amino acids when compared with P. ostreatus cultivated on the other woody substrates except phenlyalanine. Conclusively, Pycnanthus ongoleubis showed good potential as substrate for cultivation based on higher and significantly different (P≤0.05) mineral and proximate contents found in P. ostreatus cultivated on it.