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.
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.