台灣與日本海岸樹種種原蒐集與生長試驗之研究(5/5) Studies on germplasm collection and seedling growth test of coastal trees between Taiwan and Japan

林業試驗所與日本森林總合研究所合作研究瓊崖海棠( Calophyllum inophyllum)，以瞭解分佈於台灣與日本石垣島和西表島等地區之瓊崖海棠各種原間之生長性狀差異。本計畫為選拔瓊崖海棠優良母樹，並進行採種、育苗及野外栽種試驗，共調查蒐集台灣地區包括恆春(21家系)、花蓮(4家系)及台東(12家系)精英母樹共37家系，已培育1,323株健壯苗木；日本地區共採集20家系母樹，已培育480株健壯苗木。已在屏東恆春、宜蘭壯圍、雲林四湖及嘉義澐水等地區分別設置瓊崖海棠適應性生長試驗地共四處，並完成台灣32家系、日本19家系，共1331株苗木之後裔栽種工作。今年持續進行屏東恆春及宜蘭壯圍試驗地２次試驗地苗木生長調查，以及除草除蔓等撫育工作。另外，完成林四湖及嘉義澐林試驗地之設置及初步生長適應情形調查工作。
The aim of this project is a collaborative research in coastal tree research between Taiwan Forestry Research Institute (TFRI) and Forestry
and Forest Products Research Institute (FFPRI) in Japan. The first coastal tree we select is Calophyllum inophyllum. The first objectives is
to select wind tolerant plus trees among Taiwan, Iriomote island and Ishigaki island, and to collect seeds and cultivate seedlings. These
seedlings will be planted at coastal area, and seedlings survival and growth will be investigated. These data with growth difference and wind
tolerance will be determined. Total of 37 Calophyllum inophyllumplus trees have been investigated in Taiwan, including Hengchung 21 plus
trees, Hualien 4 plus trees and Taitung 12 plus trees. Each plus tree with about 100 seeds had been collected, and total 1,323 seedlings have
been obtained. Total of 20 plus trees had been investigated in Okinawa, and 480 seedlings were obtained. In 2017, Taiwan seedlings of 32 plus trees and Japan 19 plus trees 1331 seedlings are also have been planted at Hengchun, Illan, Yunlin and Chiayi sited.