Effects of Nutrient Composition on Yield and Quality of Mushroom in Lentinula edodes Cultivation Using Softwood Sawdust

This study was performed to evaluate the efficiency of using softwood as the sawdust medium for Lentinula edodes cultivation, effect of nutrient on the mycelial growth, spawning, the mushroom yield, and quality.The nitrogen nutrition significantly enhanced the mycelial growth of L. edodes.The glutamic acid in the L. leptolepis and P. koraiensis, and asparagine in the P. densiflora were appeared to slight increase in the mycelial growth.The vegetable oil showed very effective on the mycelial growth in the P. koraiensis sawdust medium.Carbon/nitrogen ratio of all the test was reduced after mycelial growth.The mycelial growth was exclusively dependent on reduction of carbon.The mushroom yield (32.7%) of the P. densiflora sawdust medium (carbon source: 3% active carbon, nitrogen source: 0.4% asparagines) was the best in mushroom production of L. edodes, followed by the Q. variabilis sawdust (35.4%) of the control medium.The diameter of mushroom cap was obtained from the P. densiflora sawdust (carbon source: 3% sucrose, nitrogen source: 0.4% potassium nitrate) and P. koraiensis sawdust (carbon source: 3% sucrose, nitrogen source: 0.4% potassium nitrate), and the P. koraiensis sawdust (carbon source: 3% xylose, nitrogen source: 0.4% glutamic acid, supplement: 0.05% amino acid), with values 71.5 mm, 71.5 mm and 72.1 mm, respectively.In the polypropylene bag cultivation, the weight losses of the block medium gradually increased for 80 days in the dark (13.8∼16.8%)and then became stable in the range of 20.7∼25.8%.