不同地理种源油桐幼林期生长性状差异分析

根据油桐的两个生长性状（树高、地径）因子，分析来自11个不同地区93个家系的油桐在幼林期的生长差异，结果表明：不同种源油桐的树高、地径在栽植初期（2013年）均存在极显著差异；栽植1 a后（2014年），不同种源油桐的地径差异仍极显著，但树高无显著性差异。同一种源不同家系油桐的生长情况有所差异，造林初期及造林1a后湖南沅陵和湖南株洲地区不同家系油桐的树高、地径均存在显著性差异，其他地区则变化不一。湖南沅陵地区油桐的树高和地径在栽植初期及1 a后均高于所有种源的平均值，生长表现较好。其中，4-11家系的树高、地径均高于种源平均值，生长表现优良。

The difference analysis of growth characters from different geographical provenances of Vernicia fordii in young growth period

The growth difference of eleven different areas' ninety-three families' of young Vernicia fordii forests was analyzed, according to the growth characters of tree height and ground diameter. The results showed that there were very significant differences of tree height and ground diameter between the different geographical provenances in the early planting stage. There were also very significant differences of ground diameter between the different geographical provenances in the year of 2014, but there were not significant differences of tree height between them. There were difference of growth conditions between the different families from the same provenance during the early planting stage and one year later. There were significant differences of tree height and ground diameter for V. fordii from Yuanling County and Zhuzhou City, Hunan Province, but the other areas' changed differently. The tree height and ground diameter of Yuanling County were higher than the average of all eleven provenance during the early planting stage and one year later. And the tree height and ground diameter of 4-11 family were both higher than the average of Yuanling provenances', growth performance was excellent.