Application of Electrical Impedance Technique in Health Assessment of Ginkgo biloba Trunk
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摘要: 为评估银杏行道树树干健康程度，降低树干断折倒伏风险，本研究采用PiCUS Tree Tronic树木电阻抗断层成像仪分别对健康、干旱、腐烂银杏树干进行检测，并与树干的目测结果进行比较.树干的断层扫描结果显示，健康树干的电阻率为中间高四周低，中部电阻率达1 000 Ω·m，四周电阻率约300 Ω·m；干旱的银杏树干整体呈现高电阻率，平均电阻率达1 000 Ω·m以上；腐烂树干的电阻率差异与腐烂区域相关，腐烂面积占比普遍高于目测结果，说明电阻抗技术能够更准确地探测树干内部的健康状况，该结果可为银杏树干健康评估提供指导.Abstract: In order to evaluate the trunk health of Ginkgo biloba trees and reduce the risk of trunk breakage and collapse, this study used PiCUS Tree Tronic tree electrical impedance tomography to detect the state of healthy, dry and rotten of Ginkgo biloba trunks, respectively, and compared with the visual inspection results. The tomographic results showed that the resistivity of the healthy trunk was high in the middle and low in the periphery. The resistivity in the middle of trunk reached 1 000 Ω·m, and the resistivity around the trunk was about 300 Ω·m. The dry ginkgo stems showed high resistivity, with an average resistivity of more than 1 000 Ω·m. The difference on the resistivity of the decayed trunk was related to the size of decayed area, and the proportion of the decayed area was generally higher than that of the visual result, indicating that the electrical impedance technology can detect the health status of the trunk more accurately. The results can provide guidance for the health assessment of the trunk of Ginkgo biloba.
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Key words:
- electrical impedance /
- tomography /
- Ginkgo biloba /
- trunk rot .
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