杉木第三代优树选择技术研究

在杉木二代种子园研究的基础上,确立了杉木第三代优树的选优区域和选优林分。提出了优树的选择优方法和步骤,并相应制定出优树树干、树皮、侧枝、结实等形质标准,优树分树龄、密度的绝对生长量标准和相对生长量标准。同时,对杉木第三代种子园育种群体的组成及建园时无性系配置的方法进行了探讨。

Study on Selective Technology of Third Generation Cunninghamia Lanceolata (Lamb.)

Based on second seed orchard,the selection of superior area and stand of third generation superior tree of Cunninghamia lanceolata （Lamb.） were established,the selective methods and steps of superior tree were proposed,while shape standard,age class of superior tree,the absolute growth standard of density,the relative growth standard of trunk,bark,lateral branch,fruit.the third generation seed orchard community of Cunninghamia lanceolata （Lamb.） and clone allocated methods were discussed.