碩士 / 國立屏東科技大學 / 森林系所 / 99 / West coast of Hengchun had been invaded by alien tree species Leucaena leucocephala for several years. Removal of Leucaena and native species reforestation had been implemented at survey plot in June 2008, for restoring the coastal foerest to native-species dominated stand. Two different width of cutting strips was used as Ecological silviclture treatments; 17 native tree species were selected as candidates tree seedlings and standard of selecting tree species for forest restoration was developed.
The 22 months performance after planting indicate that, only one pioneer species, Thespesia populnea, had excellent survival rate up to 85%, three species including Cerbera manghas, Ficus superb and Pittosporum pentandrum had survived over 70% , and worst survival rates of 30% came to Terminalia catappa and Scaevola sericea. The survival rates of three non-pioneer species, Pandanus odoratissimus, Aglaia formosana and Planchonella obovata, are higher than 70%. Two non-pioneer species, Hernandia nymphiifolia and Ficus benjamina had survived only 30%. Means of tree height of two pioneer species, Macaranga tanarius and Thespesia populnea, are over 150 cm. Tree height of 6 pioneer species are between 100~150 cm, Cerbera manghas and Scaevola sericea are less than 100 cm. Tree heights of non-pioneer species are all under 100 cm. Relatively tree height of 7 pioneer species are over 100%, and all non-pionerr species are less than 100%. Crown width of all species is smaller than 90 cm and the best one is pioneer species Macaranga tanarius with 70 cm.
We designed an assessment standards for selecting pioneer species according to survival rate, tree height, relatively tree height and crown width and sorting through different weigh into four levels. First level with excellent performance contains Macaranga tanarius, Thespesia populnea and Pittosporum pentandrum. Second level species are Millettia pinnata, Ficus superb and Ficus septic. The third level species are Scaevola sericea, Premna serratifolia and Cerbera manghas. The worst performance pioneer species are Terminalia catappa and Hibiscus tiliaceus. Only one request for non-pioneer species is acceptable survival rate and results with three species, Pandanus odoratissimus, Aglaia formosana, Planchonella obovata and Calophyllum inophyllum, in good survival rate of 70%. The survival rate of Ficus benjamina and Hernandia nymphiifolia is too low to accept but considering second planting for enriching forest diversity.
Most species had better performance in 12 m width cutting strips but density of advance tree should be pay more attention when setting up cutting strips.
| Identifer | oai:union.ndltd.org:TW/099NPUS5360002 |
| Date | January 2011 |
| Creators | 陳可芳 |
| Contributors | 郭耀綸 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 51 |
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