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자료유형
학술저널
저자정보
조남석 (충북대학교 산림과학부) 김홍은 (충북대학교 산림과학부) 민두식 (충북대학교 산림과학부) 박철하 (충북도 산림환경사업소)
저널정보
한국목재공학회 목재공학(Journal of the Korean Wood Science and Technology) 목재공학 제26권 제3호
발행연도
1998.1
수록면
93 - 99 (7page)

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Lately public interest in tree saps of maple and birch trees stimulated to increase demands for sap drink as a natural medical beverage. In order to understand factors affecting tree sap flows, birch species, particularly Betula platyphylla in Mt.Sobaek area, were monitored for daily sap flows according to factors, such as DBH, tapping hole sizes and direction of hole drilling on the trunks. The chemical constituents of saps were also analyzed. The sap flow initiated from the end of March and finished at the end of April. The flow maxima appeared from April 14th to April 26th. Total amounts of the sap flow obtained from birch tree were over 1,800 ml per day per one tree. Sap flows were increased with increasing DBH and tree age. Six milimeter drilled hole resulted in the highest sap flows. Sap flows increased with increases of diameter and height of the trees. Hole drilling to downward side(south-facing) of tree produced almost doubled sap flows than that of upward one(north-facing), while rightside drilling produced same amounts of saps to that of leftside one. Six mm drilling gave the best results not only in maximum flows but also effective hole occluding rates. The saps have in the range of 4.5 to 5.6 pH and l.0 - 2.0% of saccharinity. Sucrose, glucose, fructose and high mineral contents were found in the saps of birch tree. The tree saps could be utilized not only medicinal drink, but also one of the healthy beverages.

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