东北三大硬阔种内和种间竞争关系  

Intraspecific and Interspecific Competitions of the Three Hardwood Tree species in Northeast China

作　　者：张浩[1] 刘万生 王彦琦 陈曦[1] 穆立蔷[1] ZHANG Hao;LIU Wansheng;WANG Yanqi;CHEN Xi;MU Liqiang(College of Forestry,Northeast Forestry University,Harbin 150040;Inner Mongolia Academy of Forestry Sciences,Hohhot 010010)

机构地区：[1]东北林业大学林学院,哈尔滨150040 [2]内蒙古自治区林业科学研究院,呼和浩特010010

出　　处：《植物研究》2024年第6期870-878,共9页Bulletin of Botanical Research

基　　金：黑龙江大峡谷国家级自然保护区保护基础设施建设项目(固定样地)(HFW220100052)。

摘　　要：为分析东北地区三大硬阔树种间的竞争关系,以黑龙江大峡谷国家级自然保护区内次生阔叶混交林样地(1 hm2)为对象,测得样地内胸径(DBH)大于5 cm的乔木胸径、种类和坐标,通过Hegyi单木竞争指数算法计算竞争强度,研究分别以胡桃楸(Juglans mandshurica)、黄檗(Phellodendron amurense)、水曲柳(Fraxinus mandshurica)为对象木时,对象木胸径与竞争木的竞争强度关系,为东北地区三大硬阔树种的保护提供有力支持。结果表明:3个树种的种内、种间及平均竞争强度均随着胸径变大而变小,竞争强度与对象木的数量正相关,即随着对象木数量增加,对象木的种内竞争指数、种间竞争指数、总的林分竞争指数均增加。三大硬阔树种竞争中,胡桃楸与黄檗均是种内竞争较强,而水曲柳则是种间竞争较强。对象木胸径与竞争指数(种内、种间、总的)的关系均符合幂函数关系。In order to analyze the competitive relationships among the three hardwood tree species in northeast China,a sample plot of secondary broad-leaved mixed forest with an area of 1 hm2 was set in Heilongjiang Grand Canyon National Nature Reserve.The DBH greater than 5 cm,species,and coordinates of all trees in the sample plot were measured,and the competition intensity was calculated by Hegyi competition index algorithm to examine the relationship between the competition intensity and DBH of three tree species.It provides strong support for the protection of three hardwood tree species in northeast China.The results showed that in the competition between the subject trees and competing trees,the intraspecific,interspecific and average competition intensity of the tree species decreased with the increase of DBH,and the competition intensity was positively correlated with the number of subject trees.The intraspecific competition index,interspecific competition index and total competition index increased with the increase of the number of subject trees.In the competition of the three hardwood tree species,except for the Fraxinus mandshurica,Juglans mandshurica and Phellodendron amurense were the most intense intraspecific competition,and the relationships between the DBH of the subject trees and the competition indexes(intraspecific,interspecific and total)were the power function relationship.

关 键 词：竞争强度 三大硬阔 种内竞争 种间竞争 胸径 

分 类 号：S718.5[农业科学—林学]