碩士 / 中興大學 / 森林學系所 / 95 / The purpose of this study was to treat the litterfall dynamics at Houlong and Shihu coastal plantations in western Taiwan. The litterfall was collected once a month for 12 months. In addition, to understand the relationship between leaf area index (LAI) and litterfall, we used hemispherical photographs to evaluate LAI at the beginning of a month and collected litterfall at the end of a month. Furthermore, we combined the climate information to acquaint the influence of climate factors (precipitation, temperature, wind velocity) on litterfall and LAI dynamics. The results showed that the highest annual total litterfall was in Upland of Shihu (C. spp. and Hibiscus tiliaceus mixed plantation) (11,845 kg ha-1 yr-1), the lowest was in Casuarina spp. plantation of Houlong (6,590 kg ha-1 yr-1). This diversity should be the result of difference in stand and environment conditions. Although Upland and Lowland were equally C. spp. and H. tiliaceus mixed plantations in Shihu, the litterfall type between them were different, probably indicate that because passed through tree decay and artificial replanting, the importance of dominated tree species had changed definitely, hence have developed unlike models of the litterfall production. In the dynamics of total litterfall and litterfall components, there were seasonal variations and leaf was the basis. Nutrient content of most elements and litterfall have alike variational trends. Above-mentioned results exhibited that leaf had the conclusive influence on total litterfall and nutrient content. Among of the climate factors, major effect on litterfall was precipitation, but had to depend on locality and stand. Litterfall had higher nutrient concentration during autumn and winter; however, the action of special factors (reproduction and fresh litterfall, leaching, salt mist) made the final nutrient concentration in litterfall slightly different from this trend. The LAI variation increased during spring and summer, but decreased during autumn and winter. As a whole, the litterfall dynamics were mainly influenced by precipitation and salt mist, but litterfall caused by environment impact without senescent process and those from reproductive parts with higher nutrient were also important, and precipitation also controlled the LAI variation. Consequently, precipitation may be concluded as an important effect factor of nutrient recycling in Houlong and Shihu coastal plantations.
| Identifer | oai:union.ndltd.org:TW/095NCHU5360020 |
| Date | January 2007 |
| Creators | Yen-Chi Hwang, 黃彥綺 |
| Contributors | 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 | 75 |
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