沙质海岸人工混交林种群竞争及其生态位  

A Study of the Population Competition and Niche of the Mixed Plantation Growing in Sandy Coast

作　　者：范迎新[1] 李传荣[1] 许景伟[2] 韩芳[1] 赵飞[1] 王卫东[2] 葛文华 

机构地区：[1]山东农业大学林学院,山东泰安271018 [2]山东省林业科学研究院,山东济南250014 [3]日照大沙洼林场,山东日照276825

出　　处：《中南林业科技大学学报》2008年第2期40-44,共5页Journal of Central South University of Forestry & Technology

基　　金：国家“十五”(2002BA517A12-3);“十一五”科技支撑项目“海岸带防护林体系构造技术试验与示范(2006BAD03A14-04和05)”;山东省重点项目“农田防护林体系建设及效益评价”资助

摘　　要：采用Hegyi的单木竞争指数模型对胶南市环海林场人工混交林种群竞争强度和主要种群的生态位宽度和重叠进行了分析.结果表明:1树木受到的竞争强度与其胸径、树高和冠幅呈负相关.2黑松刺槐混交幼林竞争强度较小,成林竞争强度较大.3多树种混交林种间竞争强度的大小顺序为侧柏>火炬松>刺槐、黑松>白蜡.4多树种混交林各种群生态位宽度值大小顺序为火炬松>白蜡>黑松>刺槐>侧柏.生态位重叠较大,其中刺槐与黑松的生态位重叠值最大,为0.729,火炬松与侧柏的生态位重叠最小,为0.155.Using Hegyi single tree competition index model, this paper makes a study of the population competition intensity, together with niche breadth and niche overlap, of the artificial mixed plantation growing in sandy coast in Jiaonan City. The results indicate： （1） the competition intensity of objective trees has a negative correlation to their DBH, height and canopy ; （2） the competition intensity of adult mixed forest of Pinus thunbergii Parl. and Robinia pseudoacacia L. is bigger than that of their young one; （3） the inter-specific order of competition intensity in mixed forest is Platycladus orientalis （L.） Franco 〉 Pinus taeda L. 〉 R. pseudoacacia L. and P. thunbergii Parl. 〉 Fra：cinus chinensis Roxb. ; （4） the value order of niche breadth in mixed forest is P. taeda L. 〉 F. chinensis Roxb. 〉 P. thunbergii Parl. 〉 R. pseudoacacia L. 〉 P. orientalis （L.） Franco; and （5） the niche overlap is large; among them the largest is 0. 729 between R. pseudoacacia L. and P. thunbergii Parl. ; the smallest is 0. 155 between P. taeda L. and P. orlentalls （L.） Franco.

关 键 词：生态学 海防林 竞争 竞争指数 生态位宽度 生态位重叠 

分 类 号：Q145[生物学—生态学]