Yields of oyster mushroom(Pleurotus ostreatus) on addition rate of Juglans mandshurica sawdust

 This study was carried out to investigated optimum mixing ratio of Korean natural Juglans mandshurica using as functional plants.Total nitrogen and carbon source of J. mandshurica was 0.21% and 46.0%, respectively and C/N ratio was 219.Total nitrogen source and pH of substrate mixed with J. mandshurica was 2.3~2.9 and 5.0, respectively.The contents of CaO, MgO and Na 2 O at J. mandshurica media were higher at harvest media than inoculation media.Mycelial growth was the fastest at J. mandshurica 20%, and slower by increase of J. mandshurica substrate.Yields of fruiting body show the highest to 163 g/850 mL of medium which are addition 10% of J. mandshurica sawdust, and diameter and thick of pileus were the highest, too.The L value of pileus and stipes were increased by increase of J. mandshurica substrate, but there was no significant difference in the a-value and the b-value.The contents of P 2 O 5 and K 2 O of fruiting body were increased at J. mandshurica substrate, but there was no significant difference in contents of CaO, MgO and Na 2 O.The contents of Cu of fruiting body was decreased by increase of J. mandshurica substrate, but Fe, Mn and Zn were increased.