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选择优树是建立杉木嫁接种子园与实生种子园的首要环节和物质基础。优树的好坏直接关系到种子园林木生长及所产生的种子质量。因此,必须选择那些真正具有优良遗传特性的单株。 现在国内外采用的优树选择方法很不一致,我国杉木选优工作,普遍采用原南京林学院和福建洋口林场1964年提出的五株优势木比较法。这种方法工作量小,速度快,质量又能保证。
Choosing the best tree is the most important link and material foundation for establishing the seed grafting and seedling of Chinese fir grafting. The quality of the tree is directly related to the growth of the seed garden trees and the quality of the seeds produced. Therefore, you must choose those who truly have excellent genetic characteristics of the plant. At present, the selection method of superior trees at home and abroad is very inconsistent. In our country, the optimal selection of superior plants for Chinese fir is generally based on the comparison of five superior woods proposed by Nanjing Forestry College and Yangkou Forest Farm in 1964. This method of small workload, speed, quality and can guarantee.