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|標題:||Studies on the Vegetation Ecology and Natural Regeneration of Fagus hayatae in Lalashan
|作者:||Huang, Li -Yen
|關鍵字:||Fagus hayatae;臺灣山毛櫸;vegetation ecology;natural regeneration;植群生態;天然更新||出版社:||森林學系||摘要:||
Fagus hayatae in Lalashan was studies in this thesis to survey and explore some problems about vegetation ecology and natural regeneration. According to the matrix cluster analysis (MCA), floor vegetation types have been recognized as Plagiogyria formosana type and Yushania niitakayamensis type, there is an obvious ecotone exited between this two types at the elevations of ca. 1,950m. The correspondence in the plants and environment factors show the relations among Taiwan beech, Yushan cane and Plagiogyria formosana are negative. The relations among moisture, pH and F. hayatae are positive but negative with slope and direct light sky (DLS). 92 Fagus hayatae seedlings survive in 105 marked seedlings and the survivolship is 87.62%. The results of the 2-yrs phenology investigations in 1999 and 2000 showed as below. Fagus hayatae phenology were budding from February to March; leafing and flowering from March to April and there was a temporal distance of ten days between staminate and pistillate flower; fruiting from May to October and leaf falling phase was from October to the following February. Average growth rate of 105 seedlings of F. hayatae was 1.51cm one year and they distribute most over the southwest of tree, and 10.52m was the farthest distance of all. The population structure of F. hayatae is a slight bell shape. In the graph, 100 years was the peak and the population is about 500. Sum of the litterfall was 1,580.09kg per hectare one year and 76.94 percent of all was F. hayatae leaf. In addition, fruits of F. hatatae in Lalashan is 712,121 per hectare in 1999, of the total, September and October got the most. Seeds will germinate in natural environment after stratification for six months.
|Appears in Collections:||森林學系|
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