樹木の接地インピーダンス測定による根の生長分析

概要

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This paper describes the analysis for the growth of the root by measuring the grounding impedance of a tree. The growth of a tree is deeply related to the development of a root. It should be very useful that we measure the growth of roots without digging up and monitor the stage of the development of roots continuously in a certain way. It is because we can measure the growth without damaging a tree. In order to do this, we have a method to investigate the growth state of the roots in the ground by measuring the grounding impedance. In addition, in order to make a comparison of growth state with several trees in the same kind, we can obtain the grounding impedance of a root by converting the trunk radius of a tree into the radius of the metal-disk electrode, using the radius of the trunk at the ground level as a standard value. In this research, the grounding impedance of the root of 12 oaks, their diameters of a trunk is different, was measured and we evaluate the measured data in relation to the growth of the roots. The result proved this technique to be effective.
2004-12-25