Open AccessSap Production of Paper Birch in the Tanana Valley, Alaska
Author(s) -
Richard A. Ganns,
John C. Zasada,
C Phillips
Publication year - 1982
Publication title -
the forestry chronicle
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 49
eISSN - 1499-9315
pISSN - 0015-7546
DOI - 10.5558/tfc58019-1
Subject(s) - sucrose , fructose , forestry , betula pubescens , betulaceae , horticulture , production (economics) , environmental science , zoology , chemistry , botany , biology , food science , geography , economics , macroeconomics
Average sap production by paper birch (Betula papyrifera) ranged from 6 to 35 kg per tree during 2 years of observations. Production during 1977 was 175 percent higher than in 1976. The average carbohydrate concentration of sap was.9 percent and it consisted of 49 percent fructose, 33 percent glucose and 18 percent sucrose.
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