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对浙江省临安市、开化县和庆元县３个产地速生杉木的纤维形态及基本密度的观测结果表明：胸高处由髓心向外，纤维长度随年轮数的增加而增加，由基部到梢部先增大后减小；纤维的平均长度（Ｌ）产地不同而不同，Ｌ临安＞Ｌ开化＞Ｌ庆元；纤维的长宽比随年轮数的增多而逐渐增大。速生杉木胸高部位基本密度ρ开化＞ρ临安＞ρ庆元。同一杉木不同高度上基本密度的变化规律为：基部和梢部较大，中部较小；自髓心向外，髓心较大，后逐渐变小（２～４年轮），此后（第６年轮后）逐步平稳增大。基本密度的差异也存在于不同产地的杉木之间。
The observation of fiber morphology and basic density of fast growing Chinese fir in Lin’an, Kaihua and Qingyuan counties in Zhejiang Province showed that the height of the thorax increased from the medullary center to the fiber length with the increase of the number of annual rings, The first increase and then decrease; the average fiber length (L) origin and different, L Lin’an> L Kaihua> L Qingyuan; fiber aspect ratio increases with the increase of the number of annual rings. The basic density of fast-growing Chinese fir chest height ρ Kaihua> ρ Lin’an> ρ Qingyuan. The change of basic density at different heights of the same fir was as follows: the base and tip were larger and the middle was smaller; from the medullary center to the outside, the pith was larger and then became smaller (2-4 rounds) After the Rings) gradually steady increase. Differences in basic density also exist between different origins of Chinese fir.