執行成果摘要
一、Plus trees of Trema orientalis located at Duona and Fenggangshan , Lieukue were selected 5 ones each areas. Phenological period at both areas was similar. However, there had 20 days difference in phonological period for Alnus formosna trees.
二、Seeds of T. orientalis gave the greatest germination rate (85.1%) when treated them at alternating temperature 15/25 ℃ for 3 months. Seedlings grown in dibbling tubes for 120 days had the better shoots and root systems when compared to do in plastic bags. However, this two container seedlings showed the similar survival rate and height growth after planted in field for 4 month.
三、The Hualien plantation with 0.3 ha was established where seedlings of A. formosana and T. orientalis were planted on 1 October 2013. Growth investigation was conducted on 13 November 2014. In a general plantation, most T. orientalis plants were drown for flooding 7 days caused by heavy rains brought from Typhoon Matmo on 23 July, whereas A. formosana grew rapidly with 351.25±150.8 cm high and 12±0.25 cm in DBH. In a mushroom wood species trial, all T. orientalis and tung oil trees died for long period flooding caused by Matmo Typhoo. A. formosana trees had 74% survival and good growth with 286.4±28.5 cm in height and.05±0.54 cm in DBH.
四、The Lieukuei plantation composed with 2 planting densities (1.5×1.5m and 2×2m) of A. formosana, where located at Forest Zone #4, 750 m in elevation, was established in the middle of August this year. After planting for one month, it had 98% of survival rate and growth height between 80 and 110 cm.