作　　者： ; ; (赖根明）; (郑国丰）;

机构地区： 福建农林大学材料工程学院

出　　处： 《西北林学院学报》 2004年第2期112-115,共4页

摘　　要： 对不同年龄、不同胸径、竹竿不同部位方竹材基本密度和干缩性的进行了测定和分析,结果表明,年龄对方竹材基本密度和干缩性影响均极显著,竹竿部位对方竹材基本密度和除高向干缩系数以外的干缩性指标影响极显著,胸径对方竹材基本密度影响极显著,对方竹材体积干缩系数影响显著,对方竹材弦向干缩系数、径向干缩系数、高向干缩系数影响不显著;年龄影响的重要程度大于胸径和竹竿部位;方竹材基本密度和干缩性表现为:上部>中部>下部,随胸径增大而减小,基本密度随年龄增大而增大,而干缩性均随着年龄的增大而减小,而且基本密度和干缩性稳定期在3～4a,方竹作为用材的最适宜采伐龄为3a。 Basic densities and shrinkages of Chimonobambusa quadrangularis timber with different age, diameter and positions of culm were determined and analyzed. The results showed that age affected the basic density and shrinkage extremely significantly. Positions of culm affected the basic density and shrinkage indexes except the shrinkage parallel to grain extremely significantly. Diameter affected the basic density extremely significantly and the volume shrinkage obviously. Age affected the basic density and shrinkage more significantly than diameter or positions of culm . Basic density and shrinkage of C.quadrangularis at various positions were upper>middle>lower, and they had reverse relation with diameter. Basic density of C.quadrangularis had positive relation with age but shrinkage reversely. Its basic density and shrinkage tended to be stable within 3～4 a. The most optimal cutting age for timber of C.quadrangularis was 3 years old.

关 键 词： 方竹材 基本密度 干缩性 变异

领　　域： [农业科学] [农业科学]