【摘要】 收集我国侧柏分布区内的种源７１个。据在兰州、正宁、两当、张掖等６个试验点历时１４ａ的试验结果表明，种源间生长性状差异显著，山东泰安、河南确山、河北获鹿等优良种源树高、胸径的遗传增益分别为８．８％和１０．３％，选用优良种源造林增益明显。内蒙古、北京、辽宁、山西和陕西一带种源普遍生长较差；太行山、秦岭以东、北京、石家庄以南、淮河流域以北地区种源适应性强、生长速度快，是我省今后侧柏种子调拨的主要范围更多还原

【Abstract】 years research results of provenance trials of platycladus orientalis established in six sites such as Lanzhou、Zhengning、Liangdang and Zhangye as well showed that there are significant difference of growth characteristics among 71 provenances collected from its domestic distribution areas, and genefic gains of height and DBH of superior provenances are 8.8% and 10.3% respectively. Provenances that comes from east of Taihang Mountain and Qingling, south of Beijing and shijiazhuang, north of the Huaihe River Valley have good adaptability and grow better than that of the znner Mongonia Autonomous Rejion, Beijing, Liaoning、Shananxi and Shanxi Province, which are major areas of seed allocation for Gansu Province.更多还原