凉水林场长白落叶松种源材性变异分析及优良种源选择

以凉水林场11个种源的31年生的长白落叶松为研究对象，测定树高、胸径、材积、基本密度、顺纹抗压强度、抗弯强度、弹性模量、弦面硬度、径面硬度、端面硬度共10个指标，分析估算了各性状的变异系数和相关系数，以此为依据，进行优良种源选择。结果表明：树高、胸径的变异系数较小，分别为4.90%和7.64%；其他性状的变异系数均超过10%，其中，径面硬度的变异系数最大，达23.59%；树高、胸径和材积呈显著或极显著正相关关系，基本密度和多数力学性状呈显著或极显著正相关关系，多数力学性状间互为显著或极显著正相关关系；结合主成分分析的结果，最终选择穆棱、小北湖、鸡西长白落叶松作为凉水林场的优良种源。

Genetic Variation of Wood Properties and Superior Provenance of Larix olgensis Provenance in Liangshui Forest Farm

The tree height, DBH, timber volume, wood density, crushing strength parallel to grain, bending strength, MOE, the hardness of tangential section, the hardness of diametral plane, the hardness of end surface were analyzed for the superior provenances selection of 31-year-old Larix olgensis from 11 provenances sited in Liangshui forest farm. To select superior provenances, we estimate the variation coefficient and correlation coefficient of L.olgensis. The results showed that tree height (4.90%) and DBH (7.64%) has small variation coefficient. Other characters have rich variation (above 10%). The hardness of diametral plane has the biggest variation coefficient (23.59%). The results showed that the correlation between tree height, DBH and timber volume among families were significant or extremely significant and positively correlated. The wood density is significantly or very significantly and positively correlated with most mechanical properties. The correlation among most mechanical properties is significantly or very significantly and positively correlated. Combined with the result of principal component analysis, Muling, Jixi, Xiaobeihu were selected as the superior provenances.