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

作　　者：赵渊祥 吴明长[3] 张俊 王好运 梁大曲 吴峰 Zhao Yuanxiang;Wu Mingchang;Zhang Jun;Wang Haoyun;Liang Daqu;Wu Feng(Institute for Forest Resources and Environment of Guizhou Province/Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province,Guizhou University,Guiyang Guizhou 550025,China;College of Forestry,Guizhou University,Guiyang Guizhou 550025,China;Huangping State-owned Forest Farm,Qiandongnan Guizhou 556100,China)

机构地区：[1]贵州大学贵州省森林资源与环境研究中心,贵州省高原山地林木培育重点实验室,贵州贵阳550025 [2]贵州大学林学院,贵州贵阳550025 [3]黄平县国有林场,贵州黔东南556100

出　　处：《西南林业大学学报(自然科学)》2025年第1期213-219,共7页Journal of Southwest Forestry University:Natural Sciences

基　　金：“十三五”国家重点研发计划项目(2017YFD0600302)资助;“十四五”国家重点研发计划项目(2022YFD2201700)资助;国家自然科学基金项目(32260406)资助。

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0.431 5,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0.653 5。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。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 3 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,ex-amined the relationship between Pilodyn measured values and wood basic density,and established a Pilodyn pre-diction model.The results indicated that the basic density of P.massoniana large diameter wood initially de-creased and then increased from the pith to the outside.In all age groups,there was a significant or very signific-ant negative correlation between Pilodyn measurements and wood basic density.Notably,the correlation coefficient for wood basic density(R)in 21–35 yerars group reached−0.807,with the correlation gradually weakening from the outer to the inner regions.Furthermore,there was a very significant positive correlation among wood ba-sic 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 find-ings 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.

关 键 词：马尾松 PILODYN 年龄 木材 基本密度 无损检测 

分 类 号：S603.2[农业科学—园艺学]