3.2海南五针松的种内和种间竞争-广西植物.doc

DOI:10.11931/Guihaia.gxzw201610005 鹦哥岭海南五针松的种内和种间竞争 游娟，林乐乐，谢磊，崔国发基金项目：北京林业大学青年教师科学研究中长期项目（2015ZCQ-BH-03） [Supported by The long term project of young teachers scientific research in Beijing Forestry University（2015ZCQ-BH-03）] 作者简介：游娟（1990-），女，重庆涪陵人，硕士研究生，主要研究方向为生物多样性保护与利用，（E-mail） HYPERLINK mailto:xiaobj@163.com xiaobj@163.com。 *通讯作者：崔国发，教授，博士生导师，研究方向珍稀濒危植物保育拯救，自然保护区规划设计等，（E-mai） HYPERLINK mailto:fa6716@163.com fa6716@163.com。 （北京林业大学自然保护区学院，北京 100083） 摘要：为了探讨海南五针松群落内物种间的竞争关系，本研究对海南鹦哥岭国家级自然保护区海南五针松群落内56株对象木及442株伴生种竞争木的调查，运用Hegyi的单木竞争模型分析其种内和种间竞争强度。结果表明：海南五针松的种内和种间竞争强度分别为31.31%和68.69%，说明竞争主要来自种间。海南五针松伴生种较多，种内与主要伴生种间的竞争关系为海南五针松＞线枝浦桃＞海桐山矾＞五列木＞印度锥＞杏叶柯＞红鳞浦桃＞海南猴欢喜＞毛棉杜鹃＞浦桃＞木荷。竞争强度随海南五针松胸径的增大而减小，当海南五针松的胸径到达35cm时，竞争强度变化很小，二者符合幂函数关系(CI=aDb)，所得模型能很好的预测海南五针松的种内和种间竞争强度。根据竞争模型预测，在海南五针松胸径达到35cm之前，应对严重影响其生长的伴生种进行修枝或择伐，以保证其获得足够的生存资源，达到保护这一物种的目的。 关键词：鹦哥岭；海南五针松；种内竞争；种间竞争；竞争指数 Interaspecific and intraspecific competition of Pinus fenzeliana in Yinggeling, Hainan Province You Juan, Lin Lele, Xie Lei, Cui Guofa* (College of Nature Conservation, Beijing Forestry University,Beijing 100083,China) Abstract: To clarify the competition of Pinus fenzeliana community, we investigated the intra- and interspecific competition of Pinus fenzeliana in the Hainan Yinggeling Natural Reserve, using Hegyi individual competition indices(CI) model. The competition intensity was analyzed from the 56 objective trees and 442 concomitant competitive trees within the P. fenzeliana community. The results showed that: The intra- and interspecific competition intensities of P. fenzeliana accounted for 31.31% and 68.69% respectively in the total competition intensity, indicating a remarkable effect of interspecific competition. The value of the main competition intensity was laid out in numerical order, i.e., P. fenzeliana Syzygiumar aiocladum Symplocos heishanensis Pentaphylax euryoides Castanopsis indica Lithocarpus amygdalifolius Syzygium hancei Sloanea hainanensis Rhododendron moulmainense Syzygium jambos