Abstract
The wood consumption in Taiwan is about 5 million m 3 , and the inoculated logg consumption is 350,000 tons a year. Most of these wood cost more than 60 billion NT dollars relies on import. To meet the requirement of industry, the police of reactivation fallow ground by planting tree species with 6-10 year-rotation period, such as Acacia confusa, Elaeocarpus sylvestris, Liquidambar formosana, and Eculyptus spp., was conducted by government in 2013. Taiwan Forest Bureau estimated that 57 tons/ha of log will be harvested after planting 6 years. To evaluate the goal attainable, we established 10 ha plantation trials in farmland to estimate the growth potential for these tree spp. in 2011. Based on present aforestation data, we found it is difficult to reach the goal, unless plant right species in fallow ground which soil has a hardpan and higher bulk density, and try to use every parts of whole trees. The best management to earn profit for famers is to obtain more volume of logs with end diameter more than 25 cm which can be made of plywood. The smaller timber can provide for inoculatedlogg, while branches for producing essential oils or extracting to be functional food. We have established a 5-ha demo plantation in Miaoli where planted 9 tree species with different planting densities and mixed different species. This project try to do the better silvicultural techniques and management to obtain more multipurpose products. More profit from the valuable products, more farmers afforest, more companies such as deforestation, lumbering, and biotech invest. An industrial cluster might be formed gradually, and become a forestry production area. In 2016, we set up explanatory signs to demo the goal of field test, experiment design, tree species, and their utilization. We investigate the MAI in May and Nov, to compare tree growth before and after typhoon attack. At Hualien area, Paulownia and Trema orientalis grew rapidly and show greater wind resistance. We established these two species at a 3 ha of plantation where Eucalyptus trees were destroyed by typhoon. This year two strong typhoon attack southern Taiwan. Eucalypt and broadleaf tree species fell seriously. Paulownia grow steadily, suggesting that might be a good choice for this area. Plantation at Miali area did not affected by typhoon. This plantation composed with Eucalyptus hybrid, E. camaldulalensis, and 9 broadleaf tree species showed a beautiful stand. Soil and Water conservation Bureau established foot way and ponds to be an ecological park, where attracting may tourist to visit. In 2017, we established a 1.3 ha plantation composed with a full-sib progeny test for Paulownia hybrids and progeny and provenance test for T. orientalis . Investigating tree growth at 3 plantations including 3 species and 8 clones of Eucalyptus, 2 species of Paulownia, 2 species and 5 clones of Cinnamomum , and 6 species of nitrogen fixing trees,P. fortune i was suitable to grow in Hualien and Tainan (MAI=54.7 m 3 /ha/yr), E. camaldulensis and E. urophylla x grandis clone #22 were suitable to grow in Miaoli. Miaoli plantation was established several ecological ponds and paths to separate forest stands named as Eucalypt Garden by Water and Soil conservation Bureau. This ecological construction got a gold award of Executive Yuan. Lienhuachih fir plantation experiments stand age more than 30 years, permanent plot observations of the past 14 years, found that the performance of Chinese fir plantation grown gradually deteriorates, DBH growth arrest, about 15-20 cm among and accumulation per unit area decreased rather than increased, especially over 35 years old of afforestation, the volume per hectare dissatisfaction 100 m3. Lienhuachih Experimental Forest Garden overstating between 500-1000 m, the area of agriculture, forestry, mixed mode operation is very common. Therefore, this project intends to select Lienhuachih test forest fir forest degradation, the level of implementation of the ranks and the block logging finishing banded conducted coppice, discuss the implementation of \"forest economy\" dog bone Aberdeen planting practices, camellia, etc., while with FSC certification performed to enhance product quality and value, increase farmers' income, while at the same both ecological environment, the benefits of carbon sequestration.