Utilization Lumps of wood Flour from the Lumbering Process of Siberian Larch for the Cultivation of Edible Mushrooms

Abstract

Lumps of wood flour formed in fans and ducts for gathering dust produced. In the lumbering process of Siberian larch wood (Larix sp.), contain water extracts of about 40% (W/W). This lump was ground into wood flour (Karamatsu wood flour). The effects of Karamatsu wood flour added to agar, saw-dust and liquid media on the mycelial growth and fruit-body formation of edible mushrooms, Pleurotus ostreatus and Lentinula edodes, are investigated. The addition of Karamatsu wood flour to the above media accelerated the mycelial growth of P. ostreatus and L. edodes. By adding Karamatsu wood flour to the saw-dust medium, both fruit-body yields of P. ostreatus and L. edodes were increased. By adding suitable concentrations of Karamatsu wood flour, 2〜5% in relation to the saw-dust medium, the fruitbody yield of P. ostreatus and L. edodes were 1.2 and 1.4 times greater, respectively, in comparison to the saw-dust medium without Karamatsu wood flour. Moreover, Karamatsu wood flour reduced the mycelial growth of Trichoderma species. The effects of Karamatsu wood flour on P. ostreatus, L. edodes and Trichoderma species showed similar tendencies as the Karamatsu wood extracts. Therefore, it was considered that the water extracts of Karamatsu wood flour produced these effects.