Development of tree vigor diagnosis based on delayed fluorescenceby applying technology of very-weak light measurement

树木活力诊断对树木健康生长和防止树木倒下的安全管理至关重要。本研究旨在建立一种实用、客观的基于延迟荧光测量的树木活力诊断方法。研究结果表明，干旱胁迫下延迟荧光从开始测量到数秒内增加，这可能是诊断树木活力的有效指标。

Tree vigor diagnosis is essential for growing healthy trees as well as safety management of preventing trees from falling. This research aimed at developing practical and objective tree vigor diagnosis based on delayed fluorescence measurement. As a result, it was newly found that amount of delayed fluorescence from initiation of measurement to several seconds increase when a tree is exposed to drought stress and that this increase of delayed fluorescence may be an effective indicator of tree vigor diagnosis.