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http://dx.doi.org/10.5658/WOOD.2012.40.6.378

Factors Affecting Sap Exudation of Juglans Mandshurica and Acer Mono : (III) Inje Region in Korea  

Choi, Won-Sil (National Instrumentation Center for Environment Management, Seoul National University)
Choi, In-Gyu (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University)
Park, Mi-Jin (Division of Wood Chemistry and Microbiology, Department of Forest Products, Korean Forest Research Institute)
Publication Information
Journal of the Korean Wood Science and Technology / v.40, no.6, 2012 , pp. 378-388 More about this Journal
Abstract
This study was carried out to investigate the optimum condition for sap exudation of Juglans mandshurica in comparison with Acer mono Max. trees in a site of Inje-Gun, Gangwon-Do, Korea. Amount of sap exudation, air temperature, relative air humidity and tree diameter at breast height (DBH) were monitored for the period of February 1 through March 31, 2008, and correlation analysis of several factors affecting on sap exudation was carried out. Sap exudation from J. mandshurica initiated on Feb. 28 as the same time in case of A. mono and continued for a month, and enhanced in early March compared to around the middle of March for A. mono. The amount of sap of A. mono was linearly proportional to the diameter at breast height (DBH) but there was no apparent relationship for J. mandshurica. As the amount of sap exudation per tree increased then sap exudation per unit DBH was also linearly proportional in both J. mandshurica and A. mono. The amount of sap exudation per unit DBH of J. manshurica were $0.3{\pm}0.1{\ell}/cm$ on average, which was one third times of $0.9{\pm}0.1{\ell}/cm$ for A. mono. During the days of enhanced sap exudation, the atmospheric conditions such as air temperature and relative humidity around J. manshurica trees were very similar with those of A. mono. The minimum temperature was a significant factor affecting the amount of sap of J. mandshurica whereas the range of temperature was the principal factor for A. mono. In conclusion, the sap of J. mandshurica exudated in atmospheric conditions similar to A. mono, but the amount of sap was affected by different atmospheric factors compared to A. mono.
Keywords
Juglans mandshurica; Acer mono; sap; DBH; air temperature; relative air humidity;
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Times Cited By KSCI : 2  (Citation Analysis)
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