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测试了雷竹材的物理力学性质 ,结果表明 :竹龄对雷竹的物理力学性质有显著的影响 ;雷竹材的径向、弦向、体积干缩系数随竹龄增加逐渐减少 ;基本密度、顺纹抗压强度、顺纹抗拉强度和抗弯强度都随竹龄增加而增加 ,至 3～ 5 a较稳定。竹竿由下至上 ,含水率、干缩性逐渐减少 ;维管束密度和基本密度逐渐增加 ,力学强度亦相应提高。根据材性来看 ,雷竹的采伐利用应以 4～ 6 a为佳。
The physical and mechanical properties of Phyllostachys pubescens were tested. The results showed that: the bamboo age had a significant effect on the physical and mechanical properties of Phyllostachys praecox; the radial, chord, and volumetric shrinkage coefficients of Phyllostachys pubescens decreased with bamboo age increasing; The grain compressive strength, the parallel grain tensile strength and flexural strength all increased with the increase of bamboo age, and were stable from 3 to 5 years. The bamboo rod from bottom to top, water content, shrinkage gradually reduced; vascular bundle density and basic density gradually increased, mechanical strength also increased accordingly. According to the material point of view, the harvesting and utilization of bamboo should be 4 ~ 6 a better.