暖温带不同地区青檀形态特征分析

Morphological Variation among Different Sources of Pteroceltis tatarinowii in Warm Temperate Zone

Wild resources of Pteroceltis tatarinowii Maxim.were investigated and morphological characteristics of leaves,fruits and seeds were measured in 2005.In Lingyan Temple of Shandong,the trees grow in the temple and along the roads.In addition to the two Pteroceltis tatarinowii,the average DBH and height of the other trees were 24.32 cm and 10.05 m respectively.The stands in Miaofeng Mountain distributed only in the valley of Dishuiyan with the average DBH of 16.12 cm and average height of 11.50 cm.Pteroceltis tatarinowii could naturally reproduce in wild habitat and only a few natural reproduced seedlings were found at Lingyan Temple.The results of variance analysis showed that there was significant difference of 9 characteristics among different individual trees of the same source.Except for width of fruit wing,8 morphological characteristics significantly differed among three sources.Significant difference exited in leaf length and leaf width among three sources.Although there was no significant difference in seed and nut features between two different sources in Beijing,those characteristics of Pteroceltis tatarinowii from Beijing source were obviously different with those from Shangdong.The seeds from Shandong were the smallest and lightest.There was distinctness in morphological quality characteristics from different trees.