碩士 / 國立中興大學 / 森林學系所 / 100 / To offer the reference of mixed forest or forest understory regeneration for coastal forest in northwest Taiwan, we directed at two objective to study: First, we investigated stand condition in coastal forest in Xinfeng section, Hsinchu county and Kekegang section, Taoyuan county, then estimated the essentiality of regeneration and the adaptive species; second, we selected seeds of the Cerbera manghas, Terminalia catappa and Calophyllum inophyllum as sowing materials, then sowed the seeds at Xinfeng field, and nursery as the control group. Moreover, we investigated transplanting seedlings at large gap in Kekegang section. To explore the adaptation of these experimental species in the different gap environment and the results of forestation of these species further.
The results of stand condition: Casuarina spp. were the major species but they showed signs of deterioration. Celtis sinensis might have an opportunity of becoming a stable population but it was deficient in quantity. This suggested that artificial manner could promote the assignments of regeneration. Furthermore, Hibiscus tiliaceus and Pandanus odoratissimus showed the greater growth performance so it could plant in the understory to construct a multistoried forest
The experiment results of the sowing seedlings and the transplanting seedlings: In the nursery’s seedling, the characteristics of morphology indicated the C. manghas and T. catappa had better growth at the full light, C. inophyllum had better growth at the relative light environment of 20 % to the full light; the characteristics of photosynthesis indicated the C. manghas and T. catappa showed the greater net photosynthetic rate at the full light, and C. inophyllum had similar values between the light environment treats; the characteristics of chlorophyll fluorescence indicated the C. manghas was slightly influenced at the full light but it was still healthy according to Fv/Fm of predawn, T. catappa and C. inophyllum were not influenced. Summarizing the above results, seedlings of three species were suitable at the light environment of 20 % to the full light, but C. inophyllum couldn’t have better growth at the full light. Contrast to the field’s seedling further, sowing seedlings of the C. manghas performed lower germination percentage and morphological sections than the nursery’s seedlings, and lower survival rate at large gap. This indicated that C. manghas might not adapt to high light in harsh environments. Germination percentage of the T. catappa and C. inophyllum was very low.
Summarizing the sowing seedlings results, C. manghas was suitable for sowing to small gap which were in the light of 20 % to 40 % and T. catappa was suitable for sowing to gap or open site which were above the light of 20 % when implementing understory regeneration for coastal forest, but it required on the premise that effectively improvement of the germination percentage; moreover, C. manghas and T. catappa had good adaptation, hence they were also suitable for planting. C. inophyllum was also suitable in the same light environment with T. catappa, but it was more proper for planting.
The other transplanting seedlings could be used for regeneration in the region. To improve successful probability, it suggested that transplanting seedlings planted in the interior of stand from the start.
| Identifer | oai:union.ndltd.org:TW/100NCHU5360015 |
| Date | January 2012 |
| Creators | Shu-Ting Hong, 洪淑婷 |
| Contributors | Tien-Szu Liao, 廖天賜 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 109 |
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