老樹巨木樹齡估測之研究

Age Estimation of the Old and Giant Native Trees in Taiwan

詹明勳(Ming-Hsun Chan) ； 王亞男(Ya-Nan Wang) ； 黃憶汝(I-Ru Hong) ； 林瑞進(Lei-Chin Lin)

《中華林學季刊》 38卷2期 (2005/06) Pp. 139-150

https://doi.org/10.30064/QJCF.200506.0001

摘要

The purpose of this research was to apply a new calculation technique on the age estimation of giant and old trees by increment bore method. Bescause to the trunk of giant old tree had compression wood and non circumferential; increment bore could not acquire the sample with correct pith position. Radius length, and d(subscript i), value. A method was developed in order to estimate the above information. The width and density characteristic of tree ring were analyzed by soft x-ray image analysis. An estimation model, d(subscript i), value, from tree ring growth of sequoias was applied in the research. Thus, the six softwood species were d(subscript i)＜1.1 and three hardwood species were d(subscript i)＞1.2; this study show red cypress, camphor d(subscript i)＜1. We apply nondestructive testing method (NDT) to investigate tree core tree ring number estimate tree age. The results shows softwood age was 273-3353 year and hardwood age was 43-700 year respectively; and We will establishment tree ring growth experiment model statistic age confidence interval.

關鍵字

老樹巨木 ； 樹齡 ； 樹輪 ； 軟X-射線影像分析 ； 非破壞性檢測

並列摘要

The purpose of this research was to apply a new calculation technique on the age estimation of giant and old trees by increment bore method. Bescause to the trunk of giant old tree had compression wood and non circumferential; increment bore could not acquire the sample with correct pith position. Radius length, and d(subscript i), value. A method was developed in order to estimate the above information. The width and density characteristic of tree ring were analyzed by soft x-ray image analysis. An estimation model, d(subscript i), value, from tree ring growth of sequoias was applied in the research. Thus, the six softwood species were d(subscript i)＜1.1 and three hardwood species were d(subscript i)＞1.2; this study show red cypress, camphor d(subscript i)＜1. We apply nondestructive testing method (NDT) to investigate tree core tree ring number estimate tree age. The results shows softwood age was 273-3353 year and hardwood age was 43-700 year respectively; and We will establishment tree ring growth experiment model statistic age confidence interval.

並列關鍵字

Old giant tree ； Tree age ； Tree ring ； Soft x-ray image analysis ； Nondestructive testing diagnostic NTD