<正>以杉木试管苗靠近茎尖的茎段为外植体，通过不同预培养时间及不同浓度6-BA、TDZ、头孢霉素、卡那霉素等处理，分析诸因素对茎段再生芽的影响，建立了以杉木茎段为外植体的高频再生系统。结果表明：DCR+6-BA（1.0mg/L）+TDZ（0.001mg/L）+NAA（0.1mg/L）最适于杉木茎段诱导芽发生，预培养时间为2d时，芽诱导频率、平均芽数和芽形成能力最高。切片观察发现，茎段发生的芽多起源于茎段表面，是农杆菌容易抵达的位置，说明茎段附着农杆菌的细胞与再生芽的部位相一致。

Applying the Weakest-link rupture criterion of elasto-plastic frecture mechanics, the rupture modes of bamboo wood composite container flooring under bending loads were analyzed. Three-point bending test results demonstrate two kinds of rupture forms mainly, i.e. tension rupture o{ bottom layer and shear rupture of central layer. Based on the two cases, the theoretical predicting models of MOR for bamboo wood composite container flooring was developed. Adopting statistics regressive methods, the effects of the compression and gluing of veneers on MOR were researched, and mathematical correlative functions were also setup.