摘要
对子午岭油松林的主要物种进行实地调查,并根据林下灌木层各物种的重要值确定主要树种,然后用聚集强度指数、x2值和关联度指数对林下灌木层主要树种的空间分布格局和种间关联性进行分析.结果显示:(1)13个主要树种中除辽东栎的K值和CA值小于0外,其余种群皆表现为K>0,C>1,CA>0,I>0,m*/m>0;(2)x2检验显示,大多数树种种间关联性不显著;(3)种间关联度分析显示,树种呈正联结的共计36对,呈负联结的也有36对,有6对是关联强度低的种对.结果表明,在子午岭油松林中辽东栎与其它树种相比,具有广泛均匀分布的倾向,与其它树种之间存在强烈的竞争关系,辽东栎树种具有一定的种间竞争扩张优势.
The main tree speices of Pinus tableformis forest in Ziwuling Mountains were inventoried. 13 tree species were selected based on the important value. And the data was analyzed by spatial distribution index and x^2 and interspecific association index. The results showed that for all main tree species K〉0,C〉1, CA 〉0,I〉0,m＊/m〉0,but Quercus liaotungensis K〈0,CA〈0; The results of x^2 test showed that most tree species have indistinctive association. The interspecific association analysis indicated that there were 36 pairs of positive associations and 36 pairs of negative associations and 6 pairs of infirm associations. The results showed Quercus liaotungensis had widespread tendency and intensive competition in Ziwuling Mountains.
出处
《西北植物学报》
CAS
CSCD
北大核心
2007年第4期791-796,共6页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家重点基础研究发展规划项目(2002CB111505)资助
关键词
空间分布格局
聚集强度指数
种间关联度
spatial distribution pattern
spatial distribution index
interspecific connection
作者简介
杨君珑（1981-）,男,硕士.主要从事林业生态工程及恢复生态.
通讯作者：王辉,教授,硕士生导师.主要从事森林生态环境,荒漠化防治.E-mail：wangh@gsau.edu.cn
