Abstract
The amount of logs for culturing mushroom in Taiwan is estimated about 350 thousands tones annually. Most logs felled from stands in Taiwan are gradually depleted. Mushroom industry urged Taiwan government to face the problems. The project was drawn studies on silvicultural techniques of fast growing tree species with nitrogen fixation, key techniques related to mushroom industrial chain gap, soil management to sustain tree growth, and using sawdust of Leucaena leucocephala to culture mushroom. Based on the mushroom chain gap, there are 4 topics in this project: 1. Study on tree breeding and sivilcultural techniques of Acacia confusa, Alnus formomsana, and Trema orientalis to increase biomass production in forestation areas. 2. Study on sawdust of L. leucocephala as a part of ones to mix A. confusa sawdust to grow mushroom possible. 3. Study on reforestation in invasive L. leucocehala areas when they are removed and replaced with A. confusa trees for expanding the supplement of mushroom sawdust. 4. Study on the changes of lignocellulose contents of sawdust during the period of mushroom cultures at initial, medium, and end stages. The potential of spent sawdust to be transformed into biofuel will be evaluated. From the understanding the production chain from seedling nursing, forestation, logging, sawdust production and mediation, mushroom culture and harvest, and finally into spent sawdust composition, the well consideration of sustainable management can be established.