赵渊祥, 吴明长, 张俊, 等. Pilodyn在马尾松大径材活立木基本密度预测中的应用[J]. 西南林业大学学报(自然科学), 2025, 45(1): 1–7 . DOI: 10.11929/j.swfu.202311014
引用本文: 赵渊祥, 吴明长, 张俊, 等. Pilodyn在马尾松大径材活立木基本密度预测中的应用[J]. 西南林业大学学报(自然科学), 2025, 45(1): 1–7 . DOI: 10.11929/j.swfu.202311014
Zhao Yuanxiang, Wu Mingchang, Zhang Jun, Wang Haoyun, Liang Daqu, Wu Feng. Application of Pilodyn method in predicting the basic density of standing trees of Pinus massoniana Large-diameter Wood[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202311014
Citation: Zhao Yuanxiang, Wu Mingchang, Zhang Jun, Wang Haoyun, Liang Daqu, Wu Feng. Application of Pilodyn method in predicting the basic density of standing trees of Pinus massoniana Large-diameter Wood[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202311014

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Pilodyn在马尾松大径材活立木基本密度预测中的应用

Application of Pilodyn method in predicting the basic density of standing trees of Pinus massoniana Large-diameter Wood

  • 摘要: 用Pilodyn仪测定35年生马尾松大径材胸径处阻力值,分为0~10 a(内侧)、11~20 a (中部)、21~35 a(外侧)3个年龄段,用生长锥采集南北方向过髓心的木芯,分析各年龄段木材基本密度变化规律,探析Pilodyn测定值与各年龄段木材基本密度的关联,建立Pilodyn预测模型。结果表明:马尾松大径材木材基本密度从髓心往外主要表现为先降低后升高的趋势;Pilodyn测定值与各年龄段木材基本密度均存在显著或极显著的负相关关系,其中与21~3 5 a年龄段木材基本密度的相关系数达到−0.807,由外往内相关性逐渐减弱;各年龄段的木材基本密度之间均存在极显著的正相关关系;利用Pilodyn与全年龄段平均木材基本密度建立的回归方程的决定系数(R2)为0.4315,与21~35 a年龄段木材基本密度建立的回归方程的R2最高,为0.6535。本研究可为Pilodyn方法在马尾松大径材活立木的木材基本密度快速、无损检测的应用中提供理论依据。

     

    Abstract: The resistance value of Pinus massoniana large diameter wood at a breast diameter of 35 years was measured using a Pilodyn instrument. The wood samples were divided into three age groups: inner(0~10 years), middle(11~20 years), and outer(21~35 years). Wood cores were collected in the north-south direction, passing through the pith, using a growth cone. The study analyzed the change in wood basic density in each age group, examined the relationship between Pilodyn measured values and wood basic density, and established a Pilodyn prediction model. The results indicated that the basic density of P. massoniana large diameter wood initially decreased and then increased from the pith to the outside. In all age groups, there was a significant or very significant negative correlation between Pilodyn measurements and wood basic density. Notably, the correlation coefficient(R) between wood basic density and wood basic density in the 21~35 year age group reached -0.807. The correlation progressively weakened from the outer to the inner regions. Furthermore, there was a very significant positive correlation among wood basic density in all age groups. The regression analysis yielded a coefficient of determination(R2) of 0.4315 for the regression equation established by Pilodyn and the average wood basic density across all ages. The regression equation for the wood basic density of the 21~35 year age group had the highest R2 value of 0.6535. These findings contribute to the understanding of the Pilodyn method's application in the rapid and non-destructive testing of wood basic density in large diameter P. massoniana wood.

     

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