栓皮栎栓皮厚度的地理变异及其影响因素  

Geographical variations and its influencing factors in the cork bark thickness of Quercus variabilis

作　　者：孙婧依 王奇 刘建锋[1] 常二梅[1] 贾子瑞[1] Sun Jingyi;Wang Qi;Liu Jianfeng;Chang Ermei;Jia Zirui(State Key Laboratory of Efficient Production of Forest Resources,Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland Administration,Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,China)

机构地区：[1]林木资源高效生产国家重点实验室,国家林业和草原局林木培育重点实验室,中国林业科学研究院林业研究所,北京100091

出　　处：《北京林业大学学报》2023年第12期11-18,共8页Journal of Beijing Forestry University

基　　金：中央级公益性科研院所基本科研业务费专项重点项目(CAFYBB2022ZA001);国家自然科学基金项目(42071065、41371075)。

摘　　要：【目的】旨在揭示栓皮栎栓皮厚度的地理变异及其环境影响因素,为预测我国栓皮栎栓皮产量以及优良种质筛选与定向培育提供科学参考。【方法】使用聚类分析、混合效应模型等方法在全国范围内对12个栓皮栎群体的栓皮厚度及其影响因素进行分析。【结果】栓皮厚度与圆盘直径、圆盘年龄、木质部和韧皮部厚度均呈现极显著的正相关关系。栓皮栎树皮率、栓皮相对厚度、外皮内皮比、栓皮相对粗糙度具有明显的地理变异趋势。通过树皮率和外皮内皮比的聚类分析,陕西商洛、甘肃天水、河南内乡、河北临城、北京平谷、安徽金寨6个群体属于树皮率和外皮占比较高的类群。树皮率受圆盘直径、降水量和坡度的影响,外皮内皮比则受年均温和坡度的影响。栓皮相对厚度受年均温、降水量和坡度的影响,而栓皮相对粗糙度受圆盘直径、坡度及土壤氮含量的影响。在区域尺度上,年温度和年降水量对栓皮厚度具有显著的负效应。【结论】本研究初步量化了栓皮厚度的影响因素,可为今后栓皮栎栓皮产量预测以及良种选育提供科学参考。[Objective]This study aimed to reveal the geographical variations in cork bark thickness of Quercus variabilis and its environmental influencing factors,which could provide scientific reference not only for estimating the cork yield in China,but also for screening and breeding excellent germplasm resources.[Method]The study analyzed the thickness of cork bark and its influencing factors across 12 cork oak populations across full range,using methods such as cluster analysis and mixed effect modeling.[Result]The cork bark thickness showed highly significant positive correlation with the stem diameter,the stem age and the thickness of xylem and phloem.The cork bark rate,cork bark relative thickness,ratio of outer bark to inner bark and the relative roughness presented significant geographical trends.Through the cluster analysis of the bark rate and the ratio of outer bark to inner bark,six populations,such as Shangluo in Shaanxi,Tianshui in Gansu of northwestern China and Neixiang in Henan,Lincheng in Hebei,Pinggu in Beijing of northern China,Jinzhai in Anhui of eastern China were found to be in one cluster with higher bark rate and outer bark ratio.The bark rate was influenced by trunk diameter,annual total precipitation and slope,while the ratio of outer to inner bark was affected by annual mean temperature and slope.The relative thickness was influenced by mean annual temperature,annual total precipitation and slope,but the relative roughness was affected by trunk diameter,slope and soil N content.On the regional scale,annual mean temperature and annual total precipitation had a significant negative effect on the bark thickness.[Conclusion]This study preliminarily quantifies the influencing factors of cork bark thickness,which can provide scientific reference for future cork yield prediction and breeding of improved varieties.

关 键 词：栓皮栎 栓皮厚度 粗糙度 环境因素 

分 类 号：S792.18[农业科学—林木遗传育种] S789.1[农业科学—林学] S781.3