蒙古栎干形变异性研究  

Study on Variability of Stem Form of Quercus mongolica

作　　者：程琳 张小单 饶飞 赵西平[4] 郭平平[4] 臧国长[4] 张娜[5] CHENG Lin(Guangxi Forestry Research Institute,Guangxi Nanning 530002)

机构地区：[1]广西壮族自治区林业科学研究院,广西南宁530002 [2]赣州市林业发展服务中心,江西赣州341000 [3]浙江理工大学艺术与设计学院,浙江杭州310018 [4]河南科技大学园艺与植物保护学院,河南洛阳471000 [5]河南农业职业学院,河南郑州451450

出　　处：《林业科技》2022年第4期21-25,共5页Forestry Science & Technology

基　　金：国家自然科学基金项目(31000265)。

摘　　要：以7株蒙古栎为研究对象,采用树干解析方法,对蒙古栎的形率进行测算的结果表明,蒙古栎的胸径生长与林龄呈正相关,蒙古栎株间胸径随林龄变化大,株内胸径随林龄的变异小;蒙古栎胸高形率株间的变异大,随着林龄的增加变异减小,第7年后胸高形率变异系数较小(小于10%),稳定性相对较高,可以作为蒙古栎立木干形的特征。蒙古栎希费尔形率在纵向上有明显差异(q_(1)>q_(2)>q_(3)),整体干形比较尖削,第2~5年主要表现为树高生长迅速,干形通直;第4~5年表现为直径生长加速,树高生长缓慢,干形削度有所增加;第6~19年,直径生长和树高生长较为稳定,胸高形率趋近于0.70,干形变化小。Seven Quercus mongolica were used as the research object,and the stem analysis method was used to calculate the form quotient of Quercus mongolica.The results showed that the DBH growth of Quercus mongolica was positively correlated with age.The DBH among Quercus mongolica varied greatly with age,and the variation of DBH within Quercus mongolica was small with age.The variation of breast height rate among Quercus mongolica strains was large,and the variation decreased with the increase of age.After 7 years,the variation coefficient of breast height rate was small(less than 10%),and the stability was relatively high,which could be used as the characteristics of trunk form of Quercus mongolica.The Hiffel form quotient of Quercus mongolica was significantly different in the longitudinal direction(q_(1)>q_(2)>q_(3)).The overall stem form was relatively sharp.From the second year to the fifth year,the tree height grew rapidly,resulting in stem straight.From the fourth year to the fifth year,the diameter growth accelerated,the tree height grew slowly,and the stem taper increased.From the 6th year to the 19th year,diameter growth and tree height growth were relatively stable,chest height form quotient approached 0.70,and stem form changed little.

关 键 词：蒙古栎 干形 形率 变异性 

分 类 号：S792.186[农业科学—林木遗传育种]