远安县壳斗科植物天然次生林群落物种竞争关系研究  

Species Competition Relationships of Natural Secondary Forest Communities of Fagaceae in Yuan′an County

作　　者：肖正利 胡皓 杨忠书 向昌凤 周丹 黄芳[4] XIAO Zhengli;HU Hao;YANG Zhongshu;XIANG Changfeng;ZHOU Dan;HUANG Fang(Yuan′an Forestry Bureau,Yichang,Hubei 444200,China;Xinzhou Forestry Bureau,Wuhan 431400,China;Yiling Forestry Bureau,Yichang,Hubei 443100,China;Hubei Ecology Polytechnic College,Wuhan 430200,China)

机构地区：[1]远安县林业局,湖北宜昌444200 [2]新洲区林业局,湖北武汉431400 [3]夷陵区林业局,湖北宜昌443100 [4]湖北生态工程职业技术学院,湖北武汉430200

出　　处：《林业调查规划》2019年第5期31-36,41,共7页Forest Inventory and Planning

基　　金：湖北省教育厅科研项目(B20160555);(B2018481)

摘　　要：以远安县3个典型壳斗科天然次生混交林群落作为研究对象,在森林调查的基础上,利用Hegyi单木竞争指数模型对壳斗科群落物种竞争强度及其动态规律进行研究。结果表明,群落壳斗科植物竞争强度顺序为:栓皮栎>槲栎>枹栎>麻栎>白栎>锥栗>茅栗>苦槠>绵柯>青椆;林型竞争为:落叶林>常绿林;群落物种竞争强度为:同科种>伴生种。壳斗科群落对象木的竞争强度与胸径之间的关系为幂函数关系。当DBH≥20cm时,竞争强度趋入减小;当DBH≥30cm时,竞争强度趋于稳定,且维持在较低水平。群落的竞争压力来自种内竞争、种间(同科种间、伴生种间)竞争;壳斗科单株在Ⅰ~Ⅴ径级时,竞争强度最大。ased on the forest surveys,the Hegyi individual plant competition index model was used to study the species competition intensity and dynamic regulations of three typical natural secondary mixed forest communities of Fagaceae in Yuan′an County.The results showed that the competition intensity of Fagaceae community was Quercu svariabilis>Quercu saliena>Quercus glandulifera>Quercus acutissima>Quercus fabri>Castanea henryi>Castanea seguinii>Castanopsiss clerophylla>Cyclobalanopsis glauca>Cyclobalanopsis myrsinifolia.The competition of deciduous forest was more intensified than that of evergreen forest and the species competition intensity in the same family surpassed that in various families.The relationship between the competition intensity and the DBH of Fagaceae stands was closely followed on the relation of power function.With DBH≥20 cm,the intensity of competition tended to decrease;with DBH≥30 cm,the intensity of competition tended to be stable,maintaining at the low level.The competitive pressure of the community came from intraspecific and interspecific(same species and associated species) competitions,which reached to the maximum when diameter class was between ⅠandⅤ.

关 键 词：壳斗科植物 天然次生林 群落物种 对象木 竞争强度 单木竞争指数模型 远安县 

分 类 号：S718.551.1[农业科学—林学] S792.18