红松活立木内部腐朽程度的定量检测

Quantitative Detection of Internal Decay Degree in Korean Pine Standing

在凉水实验林场(凉水国家级自然保护区)选取了21个红松活立木截面,用Arbotom应力波测试仪和Resistograph阻抗仪进行腐朽程度检测,得到两种检测方法的腐朽程度表征,即应力波传播速度与阻抗仪阻力曲线。用生长锥在各个横截面上分别取2根长度为25 cm的木芯,在实验室测得木芯质量损失率和含水率。然后利用最小二乘法分别建立应力波传播速度和阻抗仪阻力损失值与木材质量损失率的线性方程,进而分析应力波与阻抗仪检测表征与木材腐朽程度的关系。结果表明:应力波传播速度与质量损失率之间有较强的负相关关系(R=0.698,P<0.01),且应力波检测结果需要根据影响因素进行适当修正。阻抗仪阻力损失值与质量损失率之间有显著的正相关关系(R=0.851,P<0.01)。两种方法都能有效地检测活立木的腐朽程度。

We selected 21 cross-sections of Korean pine standing trees in Liangshui National Nature Reserve Yichun City , Hei-longjiang Provice by resistograph and stress wave to get the velocity of stress wave and the resistance of resistograoh .We got two wood cores of 25 cm length on each cross-sections by the increment core to measure the weightlessness rate and mois-ture content of the wood core in the laboratory .We analyzed the relationship between the velocity of stress wave , the resist-ance of wood core and the mass loss rate by ordinary least square regression and the relationship between the detected re -sults by resistograph , stress wave and the decay degree .The velocity of stress wave had a strong negative correlation with mass loss rate （R=0.698, P〈0.01）, and the result of stress wave need properly to be corrected .The wood core resistance loss had a significant positive correlation relationship with mass loss rate （R=0.851, P〈0.01）.