摘要： 植物的水分和能量代谢在其生命活动中起着至关重要的作用。尽管用热红外成像技术研究此类功能已有报道，直接用于林木生长状态检测的研究为数不多。本研究通过创建温差指数缩小了观测间的热温波动，提高了热像温度观测的精度，增加了被测对象间的可比性。在此基础上，用热红外成像技术检测了侧柏[Platycladus orientalis (L.) Franco]伐根面以及生长锥木芯之边材与心材的差异和变化，研究了侧柏树干和鳞叶的水分和能量代谢的关系。结果发现随活力状态的变化侧柏林木边材与心材树液(sap)比值不同，而且不同活力状态的侧柏其鳞叶同样表现出热温的差异。相对于叶面积与边材面积的比值而言，热红外光谱更多地反映了树液的状态而不是木材的比例。边材和心材的树液比反映在热红外成像设备中的则是边材与心材的热温比值，该指标有潜力早期反映侧柏树木健康。柏肤小蠹(Phloeosinus aubei Perris)和双条杉天牛(Semanotus bifasciatus Motschulsky)等蛀干害虫是常见的侧柏衰弱木、濒死木、枯立木、伐倒木和新栽幼树上寄生的害虫。经过大量的热红外成像观测，侧柏衰弱木和蛀干害虫受害木边材和心材热温比明显地增大。因此，该技术有潜力成为检测侧柏林木活力和确定受害状况的重要指标，成为侧柏生态公益林抚育和经营管理的重要依据。
关键词：热红外成像;侧柏;衰弱木;蛀干害虫;过密林分;林窗更新
Abstract：Water and energy metabolism of plants is very important actions in their lives. Although the studies about these actions by using thermography were often reported, seldom were found in detecting the health status of forest trees. In this study, we increase the measurement accuracy and comparability of thermo-images by creating the difference indices. Based on it, we exam the water and energy status in stem of Chinese arborvitae (Platycladus orientalis (L.) Franco) by detecting the variance of far infrared spectrum between sap-wood and heart-wood of the cross-section of felling trees and the cores from an increment borer using thermography. The results indicate that the sap rate between sapwood and heartwood is different as the variance of the vigor of forest trees. Meanwhile, the image temperature of scale leaves from Chinese arborvitae trees with different vigor is also dissimilar. The far infrared spectrum more responds the sap status not the wood percentage in comparing to the area rate between sapwood and heartwood. The image temperature rate can be used in early determining the health status of Chinese arborvitae trees. The wood borers such as Phloeosinus aubei Perris and Semanotus bifasciatus Motschulsky are the pests which usually attack the low health trees, dying trees, wilted trees, felled trees and new cultivated trees. This measuring technique may be an important index to diagnose the health and vigor status after a large number of measurements for Chinese arborvitae trees. Therefore, there is potential to be an important index to check the tree vigor and pest damage status by using this technique. It will be a key in the tending and management of ecological and public Chinese arborvitae forest.
Key words：Thermo-image;Chinese arborvitae;Low health;Wood bores;Overcrowded stand;Canopy gap regeneration
王 斐1，吴德军1，翟国锋2，臧丽鹏3 . 侧柏衰弱木和蛀干害虫受害木的热红外成像检测 [J]. 光谱学与光谱分析, 2015, 35(12): 3410-3415.
WANG Fei1, WU De-jun1, ZHAI Guo-feng2, ZANG Li-peng3 . Diagnosing Low Health and Wood Borer Attacked Trees of Chinese Arborvitae by Using Thermography. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(12): 3410-3415.
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