孟滦林场不同年龄杨桦天然次生林生物多样性研究  

Study on Biodiversity in Natural Secondary Poplar-birch Forests of Different Ages in Mengluan Forest Farm

作　　者：崔丽红[1] 张树梓[1] 黄选瑞[1] 

机构地区：[1]河北农业大学林学院,河北保定071000

出　　处：《林业资源管理》2013年第6期114-120,共7页Forest Resources Management

基　　金：科技部"十二五"科技支撑计划(2012BAD22B0304);国家公益专项(20100400205)

摘　　要：以木兰林管局孟滦林场杨桦天然次生林为研究对象,调查不同年龄阶段(9a,18a,28a)及不同层次(乔木层、灌木层、草本层)的物种组成情况,并使用Excel和Forstat软件计算物种的生物多样性指数,用SPSS 17.0软件分析各个指数间的差异。结果表明:林内物种共计155种,隶属于50科104属,18a生林分内物种数量最多,为120种。白桦、山杨和棘皮桦为乔木层优势种,毛榛为灌木层优势种,草本层则以糙苏和乌苏里苔草为优势种;乔木层Shannon-Wiener指数、Simpson指数和均匀度指数均表现为9a<28a<18a;灌木层为18a<9a<28a,草本层各指数表现为28a<9a<18a,且均大于乔木层和灌木层。This article takes natural secondary poplar-birch forests in Mengluan Forest Farm of Mulan Forestry administration as the research object. Species composition of forests of different ages( 9 years,18 years and 28 years) and different layers( tree layer,shrub layer and grass layer) were investigated,biodiversity indexes were calculated with Excel and Forstat,and differences between different indexes were analyzed with SPSS17. 0. The results show that there are 155 species,belonging to 50 families and 104 categories,and the number of species of 18-years-old forest is the largest,which is 120. Betula platyphylla, Populus davidiana Dode and Betula dahurica are dominant species of tree layer,Corylus mandshurica is dominant species of shrub layer,Phlomis umbrosa and Carex ussuriensis are dominant species of grass layer; Shannon-Wiener index,Simpson index and evenness index of tree layer all show that 9 year < 28year < 18year; indexes of shrub layer show that 18 year < 9 year < 28year; indexes of grass layer show that 28 year < 9 year < 18 year,moreover,they are all greater than indexes of tree layer and shrub layer.

关 键 词：孟滦林场 杨桦林 天然次生林 生物多样性 

分 类 号：S718[农业科学—林学]