The Influence of Spawn Sources on Oyster Mushroom Growth

Small scale cultivation of oyster mushroom on sawdust media was conducted in Sukabumi WestJava. Medium was made of sawdust added by 10% rice bran, 1% lime, 0.4 % gypsum and plain water sufftcientfy. Sterilized medium were inoculated with three variant sources of spawn, i.e. official collection of P3HH (A), Bogor farmer (B) and Sukabumi farmer (C) Each spawn was inoculated with two methods, either shattering or pinching.The medium were then placed verticalfy and somepart horizontally in a cultivation room. Results indicated that the myceliun1growth on medium inoculatedwith spawn B was siower comparedto that of spawn A and C mycelium rowth on medium inoculated with shattering spawn was approximatefy similar to that of the pinching spawn. Mycelium growth on medium placed verticalfy was spreadfaster than that of horizontal position. Initial harvest on medium inoculatedwith spawn C (34-35 days afterinoculation)wasfasterthan those of spawn A and B (394 3 days after inoculation). However, up to 2 months after inoculation the weight of fruit body obtainedfrom spawn C was lower than that of spawn A and B. Mushroomyield from medium inoculated with the shattering spawn was similar to that of the pinchingspawn. Mushroom productivity of medium placed vertically tent to be higher than that of the horizontal medium.