近邻体结构对不同径级黄花落叶松和蒙古栎径向生长的影响  

Effects of Neighborhood Structure on Radial Growth of Larix olgensis and Quercus mongolica with Different Diameter Classes

作　　者：曾艳丽 关艳辉 乔璐靖 陈雅婷 琚存勇[1] 蔡体久[1] ZENG Yanli;GUAN Yanhui;QIAO Lujing;CHEN Yating;JU Cunyong;CAI Tijiu(Key Laboratory of Sustainable Forest Ecosystem Management,Ministry of Education,College of Forestry,Northeast Forestry University,Harbin 150040;Heilongjiang Xiaobeihu National Nature Reserve Administration,Ning’an 157499)

机构地区：[1]东北林业大学林学院,森林生态系统可持续经营教育部重点实验室,哈尔滨150040 [2]黑龙江小北湖国家级自然保护区管理局,宁安157499

出　　处：《植物研究》2025年第2期254-265,共12页Bulletin of Botanical Research

基　　金：国家自然科学基金项目(32371860)。

摘　　要：研究林木径向生长与其近邻体结构的关系,有助于了解林分结构的细微之处,使森林经营更加定量化和精确化。以小北湖自然保护区内黄花落叶松(Larix olgensis)林和蒙古栎(Quercus mongolica)林为研究对象,计算优势、伴生树种不同径级林木的径向生长量与近邻体结构参数,采用通径分析探究近邻体结构对不同径级林木径向生长的直接与间接影响。结果表明:无论是作为优势树种还是伴生树种,黄花落叶松和蒙古栎的小径级林木径向生长量均要低于中、大径级,其中,黄花落叶松的小径级林木径向生长量要低于蒙古栎,中、大径级则要高于蒙古栎。小、中径级林木径向生长与近邻体结构显著相关,大径级林木则不相关。开阔比数和竞争指数是影响黄花落叶松和蒙古栎径向生长的主要因子,且对伴生树种的影响程度要高于优势树种。随着径级增大,近邻体结构对径向生长的影响程度逐渐减小。此外,开阔比数与竞争指数的间接相互作用也会影响黄花落叶松与蒙古栎的径向生长。因此,该地区进行森林经营时,应选择小、中径级林木进行近邻体结构调整,以提高它们的开阔比数和降低竞争指数为主。Clarifying the relationship between the radial growth and neighborhood structure of trees is helpful to understand the subtleties of stand structure and to make forest management more quantitative and precise.The Larix olgensis and Quercus mongolica forests in Xiaobeihu Nature Reserve were taken as materials,and the radial growth and neighborhood structural parameters of different diameter classes of dominant and associated tree species were calculated respectively.The direct and indirect effects of neighborhood structure on the radial growth of trees with different diameter classes were explored by path analysis.The results showed that:whether as dominant or associated tree species,the radial growth of small diameter class trees of L.olgensis and Q.mongolica was lower than that of medium and large diameter classes.The radial growth of L.olgensis was lower than that of Q.mongolica in the small diameter class,but higher than that of Q.mongolica in the medium and large diameter classes.The radial growth of small and medium diameter trees was significantly correlated with neighborhood structure,but not for large diameter trees.Open comparison(OP)and competition index(CI)were the main factors affecting the radial growth of L.olgensis and Q.mongolica,and the effect of associated tree species was higher than that of dominant tree species.The effect of neighborhood structure on radial growth gradually decreased with the increase of diameter class.In addition,the indirect interaction between OP and CI also affected the radial growth of L.olgensis and Q.mongolica.Therefore,when forest management was carried out in this area,the small and medium diameter class trees should be selected to adjust neighborhood structure,mainly by improving OP and reducing CI.

关 键 词：林木生长 森林空间结构 近邻体 林木竞争 林木空间分布 

分 类 号：S758.5[农业科学—森林经理学]