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研究了杉木实生苗根生长势的测定方法，根生长势与造林第１年成活率之间的关系。新根数量和新根总长与造林成活率密切相关，可以反映苗木的真实质量。通过对根生长势同苗木形态指标之间相关关系的分析，发现长度≥５ｃｍ的１级侧根数和苗木鲜重与根生长势相关紧密，地径、苗高、主根长等指标与根生长势相关不紧密。
The method of determining the growth potential of seedling root of Cunninghamia lanceolata was studied. The relationship between root growth potential and survival rate in the first year of afforestation was studied. The number of new roots and total length of new roots are closely related to the survival rate of afforestation, which can reflect the true quality of seedlings. Through the analysis of the correlation between root growth potential and seedling morphological characteristics, it was found that the root number of first grade and the fresh weight of seedling were closely related to the root growth potential. The indexes of root diameter, seedling height, main root length and root growth potential Not closely related.