Electrical conductivity (EC) of the unseasoned timber of three softwood species (Pinus radiata, Pseudotsuga menziesii, and Sequoia sempervirens) and one hardwood species (Eucalyptus globoidea) was studied over the temperature range of $$20-90^\circ \hbox {C}$$ . EC was measured in sapwood, transitional wood, and heartwood in the three principle grain directions. All species exhibited similar behaviour: (1) heartwood EC was lower than that of sapwood and (2) EC increased with temperature. P. radiata samples from two regions of New Zealand’s South Island showed variation of EC by a factor of two in the longitudinal direction; however, in the radial and tangential directions, the EC variation was less pronounced. This work seeks to provide possible explanations for EC variation in green wood and to propose suggestions for future research.

中文翻译：

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$$20-90^{\circ }\hbox {C}$$温度范围内绿色木材的各向异性电导率

在 $20-90^\circ\hbox {C }$$ 。EC 在边材、过渡材和心材的三个主要纹理方向上进行测量。所有物种都表现出相似的行为：（1）心材 EC 低于边材，（2）EC 随温度升高。来自新西兰南岛两个地区的 P. radiata 样本显示 EC 在纵向上的变化为 2 倍；然而，在径向和切向方向上，EC 变化不太明显。这项工作旨在为绿色木材中的 EC 变化提供可能的解释，并为未来的研究提出建议。