Electrical resistance as a guide to thinning sugar maples

Shortle, Walter C.; Abusamra, J.; Laing, Frederick M.; Morselli, Maria Franca

doi:10.1139/x79-070

Cited by 9 publications

(4 citation statements)

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“…In recent years, bioelectrical measurements of trees are receiving much attention as a method of monitoring various physiological states of trees (Shortle et al 1911\ Shortle et al 1979Kostka and Sheralda 1982;Blanchard et al 1983;Smith et al 1984;McDougal et al 1988;Oven et al 1995). Electrical conductivity, electrical capacitance and electrical resistance are parameters measured.…”

Section: Introductionmentioning

confidence: 99%

Electric Current Density Imaging of Pedunculate Oak(Quercus RoburL.) Twigs by Magnetic Resonance Imaging

Beravs¹,

Oven²,

Serša³

et al. 1998

Holzforschung

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The use of Electric Current Density Imaging (CDI) technique to map spatial distribution of induced electric currents through two years old twigs of pedunculate oak (Quercus robur L.) is presented. Specifically, this magnetic resonance technique was implemented to image conductivity contrast in different tree tissues. Imaged electric conductivity distributions of pith, wood, and phloem together with cambial zone and undifferentiated xylem were compared with flame atomic absorption spectrometry measurements of potassium. Good correlation was observed. The undifferentiated xylem + cambial zone + complete phloem showed higher electrical conductivity and normalized potassium values than both differentiated xylem and pith. By a novel magnetic resonance imaging technique it is demonstrated that the path of least resistance to an electric current was along tissues of maximum free potassium concentration.

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Section: Introductionmentioning

confidence: 99%

Electric Current Density Imaging of Pedunculate Oak(Quercus RoburL.) Twigs by Magnetic Resonance Imaging

Beravs¹,

Oven²,

Serša³

et al. 1998

Holzforschung

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“…(Tattar et al, 1972;Wargo & Skutt, 1975;Shortle et al, 1979;Shortle & Ostrofsky, 1983;Tomiczek, 1987 (Tattar et al, 1972;Malia & Tattar, 1978;Blanchard et al, 1983). Cette résistance électrique est inversement proportionnelle à la vitalité de l'arbre : quand la résistance électrique augmente, la vitalité de l'arbre diminue.…”

Section: Introductionunclassified

Etude de la résistance électrique du cambium dans les épicéas (Picea abies L.) dépérissants

Garrec¹,

Heymes²,

Rose³

et al. 1989

Ann. For. Sci.

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Simultaneously, the influence of a number of factors (position of the electrodes on the trunk, number of measurements, diameter of the tree and external conditions) was evaluated.In healthy spruce, it appears that resistance increases when the diameter of the trees decreases, and that this relation between resistance and diameter depends on the stand (influence of soil fertility ?).In declining spruce, we show that this phenomenon leads to a significant increase in cambial electrical resistance, and that the smaller the diameter of the spruce, the more important this increase is. This study points out that the cambial electrical resistance measurements corroborate the results provided by conventional methods (rate of needle loss), but by quantifying, specifying and magnifying them. Therefore the cambial electrical resistance measurements can be used in symptomatology to provide a rapid assessment in the field of the dec7ree of vitality in declining spruce over time.cambial electrical resistance -spruce -decline -symptomato,logy

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“…This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. (Shortle et al 1979). …”

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confidence: 99%

Assessment of Landscape Tree Vigor Using Cambial Electrical Resistance

Dongkyu¹,

Kim²

2016

Ecology and Resilient Infrastructure

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ABSTRACT:There are various methods to evaluate tree vigor. Cambial electrical resistance represents tree vigor using the method of electrophysiological diagnosis. This study investigated the vigor of several tree species using Shigometer, and compared the differences among the species. The factors, such as foliation, trunk orientation and bark temperature, which affect electrical resistance were also investigated. The needle penetration into cambium was controlled to keep the depth consistent in order to minimize measurement error. Each of three trees were selected from Zelkova serrata, Ginkgo biloba, Metasequoia glyptostroboides, Pinus koraiensis, and Liriodendron tulipifera. The electrical resistances were measured at 60 and 120 cm height of the stem in 4 directions from March until May 2011. The soil conditions in surrounding areas and tree stress responses were also measured. The results were analyzed for the relationship between electrical resistance and the affecting factors. The electrical resistance showed a relatively higher level before foliation until mid-March. The values started to decline from April and recorded a minimal level on May 11. The changes of soil moisture, soil electric conductivity, and tree stress responses during the measurement period showed a similar trend to that of electrical resistance. The Pinus koraiensis, an evergreen conifer, showed few changes on the electrical resistance values during the measurement period. Zelkova serrata, Ginkgo biloba, and Metasequoia glyptostroboides showed the highest bark temperatures and lowest electrical resistances at their south-facing stem. Shigometer can provide measures simple to assess tree vigor in the fields, and to the management of trees.

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Electrical resistance as a guide to thinning sugar maples

Cited by 9 publications

References 0 publications

Electric Current Density Imaging of Pedunculate Oak(Quercus RoburL.) Twigs by Magnetic Resonance Imaging

Electric Current Density Imaging of Pedunculate Oak(Quercus RoburL.) Twigs by Magnetic Resonance Imaging

Etude de la résistance électrique du cambium dans les épicéas (Picea abies L.) dépérissants

Assessment of Landscape Tree Vigor Using Cambial Electrical Resistance

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