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本文以12年生和28年生杉木(Cunninghamia lanceolata (Lamb.)Hook)人工林样木为材料,对材性性状的株内变异性进行了分析,结果表明:(1)在株内不同部位,木材密度和管胞长度存在着显著的变异性;(2)胸高部位上自髓心向外,木材密度(经苯-乙醇抽提后)和管胞长度迅速增大,至13～18年轮后大致趋向稳定;(3)对28年生和12年生的树木,抽提前后木材密度平均相差14.4％和4.5％,但抽提前后木材密度紧密相关。(4)幼龄(5,10,15年生)木材的密度和管胞长度,与成龄木材(28年生)的相应性状之间具有紧密相关性。
In this paper, the 12-year-old and 28-year-old Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) plantation wood samples were used to analyze the intraspecific variability of the traits. The results showed that: (1) Density and tracheid length; (2) From the medullary center to the thorax, the density of wood (after benzene-ethanol extraction) and the tracheid length increased rapidly. From the 13th to 18th year after the rotation (3) For 28-year-old and 12-year-old trees, the average density of wood before and after extraction was 14.4% and 4.5% respectively, but the density of wood before and after extraction was closely related. (4) Density and tracheid length of young (5, 10, 15 year old) wood are closely related to the corresponding traits of adult timber (28 year old).