專家共同推薦適合臺灣都市林的157種原生景觀樹種

The 157 native landscape tree species recommended jointly by experts as suitable for urban forest in Taiwan

臺灣原生植物超過4,000餘種，有必要提出一份種類較少且可實際應用之景觀樹種參考名錄，以利都市林推廣應用原生樹種。本研究為建立臺灣都市林原生景觀樹種之名錄，首先擬定樹種篩選的整體概念架構，再依序逐步建立完整名錄（1,397種）、可用名錄（591種）、推薦名錄（157種）、審定名錄。推薦名錄係由109位專家針對可用名錄票選並獲1／2以上之專家認同的共同推薦樹種，包含杜英、青剛櫟、櫸樹、大頭茶、穗花棋盤腳等157種。推薦名錄是本文最主要之成果，提供了未來臺灣都市林建造之重要原生樹種。此外，本研究發現促進景觀業者熟悉原生植物是未來最需強化的環節，且過去常用景觀書籍遺漏了許多具潛力的原生樹種，包括烏皮九芎、鐘萼木、捲斗櫟等33種。本文建議未來臺灣各大都市宜參考本文之推薦名錄，考慮各樹種之環境適合性與地方性特色來建立各地之都市林推薦名錄，再逐步完善這些原生樹種之苗木可獲得性、提升景觀業者對原生樹種之熟悉度及相關的養護知能。

There are more than 4,000 species of native plants in Taiwan. It is essential to provide a reference list of fewer and practically applicable species to facilitate the promotion of native trees in urban forests. To establish the list of native species for Taiwan's urban forest, we formulated a framework for tree species selection, and establish a complete list of 1,397 species, from which a usable list of 91 species , a recommended list of 157 species, and a verified list of 32 speices were further categorized. The recommended list is the main result presented in this article, and it is also the most important reference list of Taiwan's urban forests in the future. The list of the recommended tree species were generated by votes of more than 1/2 of the 109 experts based on the usable list and approved. The list included 157 species such as Elaeocarpus decipiens, Cyclobalanopsis glauca, Zelkova serrata, Gordonia axillaris, Barringtonia racemosa. During the selection process of tree species, we found that familiarity of native plants by landscape practitioners is the most important aspect that need to be enhanced in the future; moreover, common landscape books used often by landscape practitioners did not include 33 sutiable plant species such as Styrax formosana, Bretschneidera sinensis, Cyclobalanopsis pachyloma. In the future, we suggest that a recommended list of urban forests of major cities in each region should be established by considering the suitability and local environmental of each tree species, and progressivly improve the seedlings availability of these native trees, and enhance the landscape practitioner's familiarity with native plants and related knowledge of maintenance.