- 期刊
南投縣鳳凰山地區孟宗竹產筍林之調查
Investigation on stand of Moso Bamboo Shoots (Phyllostachys Pubescens) in Fenghuangsam Area, Nantou County
摘要
孟宗竹為台灣重要的經濟竹種之一，目前主要的經營目標為竹筍生產。本研究以南投縣鳳凰山孟宗竹產筍林分為調查對象，探討孟宗竹產筍林分結構、竹稈生長特性，以及地上部生物量乾重累積情況。調查結果顯示，南投縣鳳凰山孟宗竹產筍林，林分密度為7,267 ± 503株ha^(-1)；孟宗竹竹稈生長部分，孟宗竹平均胸徑為6.9 ± 0.1 cm，平均竹高為11.9 ± 0.6 m，平均枝下高為4.7 ± 0.3 m。鳳凰山孟宗竹產筍林不同齡級之株數頻度分布，主要集中在1、2年生竹，分別為37.2%和35.8%，而3年生，則為25.2%，4年生及以上者頻度極低，僅占1.8%，顯示調查的產筍林明顯有擇伐4年生以上成熟老竹之施業。孟宗竹產筍林地上部生物量乾重部分，稈乾重為56.7 ± 5.7 Mg ha^(-1)、枝乾重為17.9 ± 1.8 Mg ha^(-1)、葉乾重為10.6 ± 1.0 Mg ha^(-1)，平均地上部總生物量乾重為85.4 ± 8.5 Mg ha^(-1)。
並列摘要
Moso bamboo (Phyllostachys pubescens) is one of the economic bamboos in Taiwan. We studied the shoot production which is the major purpose of bamboo forest management. The stand density was 7,267 ± 503 culms ha^(-1), DBH is 6.9 ± 0.1 cm, average height of bamboo was 11.9 ± 0.6 m, and the average height under branches was 4.7 ± 0.3 cm. The result showed figures for distributive frequency and biomass of culms in shoot-productive stands in different ages. Overall, the highest percentage of distributive frequency in different ages was both of age 1 and 2, 37.2% and 35.8%, respectively. Furthermore, the percentage of frequent distribution on age 3 was fewer than above at 25.2%. On the other hand, the lowest percentage in those ages was on above age 4 at 1.8%. In terms of biomass, the biomass of stems, branches and leaves were 56.7 ± 5.7 Mg ha^(-1), 17.9 ± 1.8 Mg ha^(-1) and 10.6 ± 1.0 Mg ha^(-1), respectively. Summing on the aboveground biomass of shoot-productive stand was 85.4 ± 8.5 Mg ha^(-1).