The Variation of Growth Performance, Timing of Leaf Burst, and Leaf Form among 23 Provenances of Quercus rubra L. in Korea

摘要

To select superior exotic species and provenance for Korean environmental condition, a provenance test for northern red oak(Quercus rubra L.) was performed using seeds of twenty-three provenances originated from USA and Canada in 1933. The growth performance was highly significantly different among provenances Average growth of height, DBH, volume, and survival rate at twelve years of age are 6.27m, 6.0cm, 0.0115m~3, and 78.4%, respectively. Growth performance of northern red oak was best in seed sources from low longitude such as provenance Dunham Island and Selkirk Shore Park. (1) in New York, USA and positively correlated by increase of ages. The selection of superior provenances seems to be possible by investigation of growth characters on juvenile stage of ages 3 after plantation. Additionally, growth of northern red oak was superior 18.9% in height, 7.2% in DBH, and 45.3% in volume to that of endemic Quercus acutissima. The timing of leaf burst was usually initiated to early April and completed to early May. The provenances from the north or the west are earlier than those of the south or the east. Analysis of variance for all leaf characters were significantly different among provenances. The coefficient of variation showed above 22% to only the characters of petiole length, minimum width of leaf, and leaf area. Longitude of seed origin was not correlated with all leaf characters while latitude was negatively correlated with vein number and positively correlated with minimum width of leaf.