雪山翠池地区玉山圆柏林林分结构.PDFVIP

34(1) 53-62, 2012 53 林業研究季刊 ： 研究報告 雪山翠池地區玉山圓柏林林分結構 1 2 3 惪4 5 林志銓　曾喜育 　王志強 　蔡尚 　呂金誠 【摘要】翠池地區玉山圓柏群落依形態及林分組成，可區分為矮盤灌叢、喬木林及交會帶之玉山圓 柏林，本研究主要針對喬木型及交會帶之玉山圓柏林，進行林分結構的調查與分析。結果得知以負 J 指數函數擬合喬木型玉山圓柏林，以及交會帶玉山圓柏、臺灣冷杉的直徑分佈，均屬反 型直徑分 3 布。本研究發現喬木型玉山圓柏 個生長階段，以負指數分布函數模擬，適當反應出林分的相對密 度及連續直徑階之間的削減速率，結果顯示初期階段削減速率最高、其次是晚期、中期階段削減速 率低，而交會帶玉山圓柏亦有類似現象。透過密度—胸高直徑半對數圖，利用簡單線性迴歸驗證玉 山圓柏林三種生長階段對數林分密度中，各生長階段之直徑階間的負斜率，可瞭解不同生長階段之 U 遞減速率的差異，反映出老熟林不對稱 型死亡率之現象，即玉山圓柏為長壽型，且為長期處優勢 之樹種表現，上揭研究結果可供後續對玉山圓柏林分動態研究參考。 【關鍵詞】玉山圓柏、林分結構、負指數函數、生長階段、削減率 Research paper Stand Structure of Juniperus morrisonicola Forest at Cuei-Chih Area in Mt. Shye Chih-Chuan Lin1　Hsy-Yu Tzeng2　Chih-Chiang Wang3　Shang-Te Tsai4　King-Cherng Lu5 Abstract Juniperus morrisonicola (juniper tree) forest community at Cuei-Chih Area in Mt. Shye of 【 】 Taiwan, according to physiognomy and composition it can be divided into 3 categories of sites as following arbor forest, ecotone between J. morrisonicola and Abies kawakamii , and krummholz. In this paper, the class of diameter at breast height (DBH) of J. morrisonicola and A. kawakamii in the sample plots were surveyed. The results showed that the diameter distributions of trees including J. morrisonicola and A. kawakamii at arbor forest and ecotone sites were exhibited as inverse J-shaped. According to DBH size, 1. 國立中興大學森林學系博士班學生 PhD program graduate student, Department of Forestry, National Chung-Hsing University. 2. 國立中興大學森林學系助理教授 Assistant Professor, Department of Forestry, National Chung-Hsing University. 3. 國立屏東科技大學森林系副教授 Associate Professor, Deptartment of Forestry, National Pingtung University of Sc