Due to the geographical location at the northern area of South China Sea, the vegetation feature of the Dongsha Atoll National Park is very special




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東沙島景觀及原生植被復育計畫()

海洋國家公園管理處(中華民國99年 12 月)

執行單位:中華大學

計畫主持人:蔡靜嫺

共同主持人:郭城孟、鄭文隆、周文杰、陳憲榮

協同研究人員:葉慈青、邱鈺鈞


摘要

關鍵詞:植栽物候調查、育苗、撫育

東沙島位於南中國海北邊中的一個隔離地理位置,所以島內擁有許多特殊的植物物種。例如:白避霜花、橙花破布子、海人樹、白水木、毛苦參、老虎心、匍地垂桉草、沙生馬齒莧等,是個生態資源極為豐富的地方。海洋國家公園管理處在過去2 年多來蒐集當地重要植物種類的物候資料,對於物種年週期變化以及採種育苗時機已有初步的瞭解與成效;並在2009 年建置完成簡易網室與苗木馴化場,目前已經可以利用於生產苗木。

在東沙島培育採自東沙植株的苗木,除了減少運輸過程造成的耗損、以及在培育過程避免雜草污染的風險之外,也可降低因輸入種苗所帶來的外來種與外來基因移入的風險,進而保存當地生物的基因多樣性。但是,目前東沙管理站現場執行人員絕大多數非相關背景,缺乏植物物候調查、苗木培育、撫育相關操作訓練。因此本計畫案的物候調查、育苗與馴化標準作業流程之編寫,可提供東沙管理站人員、保育志工未來從事景觀與原生植被復育之相關業務時之參考。

本計劃選擇19 種植種作為未來育苗的優先考量,包含木本植物15 種,分別為海人樹、草海桐、葛塔德木、亞洲濱棗、檄樹、白水木、止宮樹、欖仁、白避霜花、橙花破布子、瓊崖海棠、老虎心、毛苦参;以及多年生草本植物4 種-馬鞍藤、濱刀豆、沙生馬齒莧、匐地垂桉草。針對各植種建議使用實生苗、扦插、高壓、分株及現地小苗等培育方法,擬定適合當地育苗標準作業流程,作為未來東沙島育苗操作之參考。計畫案中並提出適當的撫育方法,以利育苗過程及移植得以順利進行,進而提高苗木存活率。

本計畫提出苗木生產原則並搭配銀合歡移除構想與期程,佐以物候調查資訊及育苗及撫育技術,進行分期分區之移除,做為東沙島國家公園未來進行景觀與原生植被復育之規劃與參考。

Abstract

Keywords:vegetation phenology, seedling,nursery operations

Due to the geographical location at the northern area of South China Sea, the vegetation feature of the Dongsha Atoll National Park is very special. There are many typical tropical species, such as Pisonia grandis R. Br, Cordia subcordata Lam., Suriana maritime L., Torunefortia argentea L. f., Sophora tomentosa L., Caesealpinia bonduc (L.) Roxb., Triumfetta repens (Blum) Merrill & Rolfe, Portulaca psammotropha Hance. etc. The Dongsha Marine National Park Headquarter has worked hard on the flowering phenology for the past two years. According to the data, the headquarter was devoted to restoration and establish a greenhouse in 2009.

Native seedlings cultivated from Dongsha Island on-site may decrease the losses from transportation and the hazards from weeds contamination. By reducing exotic species and genes from importing seedlings, the local generic diversity can be preserved. However, most of current staff working at Dongsha Marine National Park Headquarter are not related background of vegetation phenology, seedling, and nursery operations. Therefore, the standard operation processes for phenology, seedling, and domestication developed in this project can be references for implementing landscape and native vegetation restoration by staff of Dongsha Marine National Park and conservation volunteers in the future.

There are 19 vegetation species selected in this project, including 15 woody plants as follows: Suriana maritime L., Scaevola sericea Vahl, Neonauclea reticulate ( Havil .)., Colubrina asiatica (L) Brongn., Morinda citrifolia L., Sophora tomentosa L., Allophylus timorensis (DC.) Blume, Terminalia catappa L., Pisonia grandis R. Br, Cordia subcordata Lam., Calophyllum inophyllum L., Torunefortia argentea L. f., Caesealpinia bonduc (L.) Roxb., and 4 perennial herbaceous plants as follows: Ipomoea pescaprae (L.), Canavalia lineata (Thunb.) DC., Triumfetta repens (Blum) Merrill & Rolfe, Portulaca psammotropha Hance.. Cultivation methods include seedling, cottage, layering, sprout, etc. and make a the standard operation processes for growing seedlings.







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