枫香地理种源幼林生长性状变异研究

对来自8省（区）的20个枫香种源在上海松江进行了造林试验,2年生幼林的结果表明：枫香的树高和地径2个生长性状在种源间存在极显著和显著差异，且树高有较高的广义遗传力；2个生长性状在不同造林地段间也表现出极显著差异；树高与种源地理经度和纬度间均呈显著负相关，而地径则未表现出显著负相关。根据苗高和地径，采用独立选择法初选出南丹、南平和吉安3个幼林期较速生的种源．并采用系统聚类法初步将种源划分为三个大区：西南速生种源区，中部中速生长种源区和中亚热带东北部生长相对较慢种源区。

A Study on Variations of Young Forest Growing Traits in Liquidambar formosana Geographic Provenances

The affforestation provenance trial of Liquidambar formosana containing 20 seedlots collected from 8 provinces (zone) was conducted in Songjing of Shanghai City. The results in 2 years showed: there were significant differences in the 2 growth traits, namely, tree height and ground diamater of the Liquidambar formosana provenance, and the broad heritability of tree height was high. There were significant differences in the 2 growth traits under different affforestation terrains. The tree height had significant negative relation to latitude and longitude of the seedlots, while the ground diamater had no significant negative relation to latitude and longitude of the seedlots.The 3 quick-growing provenances have been selected in the young forest, they are Nandan in Guangxi, Nanping in Fujian,Ji'an in Jiangxi.The 3 provenance zones are districted by means of system cluster, which are quick-growing provenance zone of southwest-subtropics, middle-growing provenance zone of middle-subtropics and slow-growing provenance zone of northeast-subtropics.