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Effects of Environmental Factors on the Cambial Electrical Resistance of Woody Plants  

Kim, Dong-Uk (Graduate School, Catholic University of Daegu)
Kim, Min-Soo (Dept. of Landscape Architecture, Catholic University of Daegu)
Lee, Bu-Yong (Dept. of Environmental Science, Catholic University of Daegu)
Publication Information
Journal of the Korean Institute of Landscape Architecture / v.35, no.3, 2007 , pp. 105-113 More about this Journal
Abstract
This study was conducted to analyze the effects of environmental factors such as soil moisture, light intensity, temperature and humidity on changes in cambial electrical resistance. To improve data quality, cambial electrical resistance was continuously measured at fixed points by using a data logger isolated from alternating current. The relationship between environmental factors and changes in cambial electrical resistance was also analyzed. The results are as follows: 1. Cambial electrical resistance is highly correlated to the temperature of the measured area(r=-0.934). Therefore, temperature compensation is needed to analyze the effects of other environmental factors on cambial electrical resistance changes. 2. If temperature is compensated for, the change of cambial electrical resistance is highly correlated to water vapor pressure(r=-0.836). 3. If temperature and humidity are compensated for, the change of cambial electrical resistance is highly correlated to intensity of light(r=-0.738). 4. Diurnal deviation of soil water potential is not more significantly related than the change of cambial electrical resistance. However, in the long-term, soil water potential and cambial electrical resistance are highly correlated(r=-0.831). This indicates that soil moisture significantly influences the long-term change of cambial electrical resistance.
Keywords
C.E.R; Soil Water Potential; Diurnal Deviation; Data Logger; Water Stress; Continuous Measurement;
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