为了确定落叶松人工林中不同因子对林下草本植物多样性的影响,在塞罕坝机械林场对林下草本植物展开调查。通过对调查资料进行相关分析和逐步回归,得出不同生境因子和林分因子对草本物种丰富度、多样性指数及均匀度指数的影响程度。结果表明:1) 生境因子中海拔对丰富度指数S正相关显著,对多样性指数和均匀度指数相关性不显著;坡向与各指数均不显著;坡度与Simpson多样性指数D及基于Simpson多样性的均匀度指数Jsi负相关极显著,对Shannon-Wiener多样性指数H及基于Shannon-Wiener多样性的均匀度指数Jsw负相关显著,说明坡度对Simpson指数的影响甚于Shannon-Wiener指数。2) 林分因子中林分密度和郁闭度均对H及Jsw正相关极显著,对Jsi正相关显著,说明落叶松人工林林分密度和郁闭度对Shannon-Wiener指数的影响比对Simpson指数的影响更敏感;林龄对S及H正相关极显著,对Jsw正相关显著。
The investigation was conducted from July to August in Saihanba Forest Farm in order to determine how the different factors of the larch plantation affect the plant diversity.On the basis of statistics of investigation data,effects of different factors on species richness,evenness and plant diversity were discussed.The results showed that altitude had significant positive correlation with S.Aspect had no relations withother factors.Slope had more significant positive correlation with D and Jsi than H and Jsw.The results demonstrated that the effects which were caused by slope were more sensitive to Simpson indexes.Density and cannopy density had more sensitive effects on Shannon-Wiener indexes than Simpson indexes.Age had significant positive correlation with S and H,but not Jsw.
[1]李俊涛,谭晓京,蔡体久,等.凉水国家级自然保护区森林群落林下物种多样性[J].北京林业大学学报,2007,29(2):266-271.
[2]周会萍,牛德奎,张继红,等.湿地松人工林群落林下植被物种多样性研究[J].江西农业大学学报,2006,28(1):78-83.
[3]张晓辉,周建云,何景峰,等.黄龙山林区主要森林群落下物种多样性研究[J].西北林学院学报,2007,22(4):39-44.
[4]李利平,邢韶华,赵勃,等.北京山区不同区域油松林植物多样性比较研究[J].北京林业大学学报,2005,27(4):12-16.
[5]于立忠,朱教君,史建伟,等.辽东山区人工阔叶红松林植物多样性与生产力研究[J].应用生态学报,2005,16(12):2225-2230.
[6]张丽荣,王建中,王建军,等.塞罕坝自然保护区维管植物多样性研究[J].林业资源管理,2003(5):53-57.
[7]王庆锁,李玉中,路端正,等.河北省塞罕坝地区种子植物区系的过渡性分析[J].生态学杂志,2005,24(5):473-477.
[8]翟洪波,殷建伟,魏晓霞.半干旱地区华北落叶松人工林合理密度探讨——以塞罕坝机械林场为例[J].林业资源管理,2006(3):48-50.
[9]马克平,黄建辉,于胜利,等.北京东灵山地区植物群落多样性的研究[J].生态学报,1995,15(3):268-277.
[10]李清河,杨立文,周金星.北京九龙山植物群落物种多样性特征对比分析[J].应用生态学报,2002,13(9):1065-1068.
[11]陈廷贵,张金屯.十五个物种多样性指数的比较研究[J].河南科学,1996,17:55-57.
[12]黄忠良,孔国辉,何道泉.鼎湖山植物群落多样性的研究[J].生态学报,2000,20(2):193-198.
[13]黄康有,廖文波,金建华,等.海南岛吊罗山植物群落特征和物种多样性分析[J].生态环境,2007,16(3):900-905.
[14]李毳.山西庞泉沟针叶林群落植物多样性研究[J].水土保持学报,2001,15(5):95-98.
[15]高润宏,董智,张昊,等.额济纳绿洲胡杨林更新及群落生物多样性动态[J].生态学报,2005,25(5):1019-1024.
[16]刘玉宝.29年生杉木林下植物多样性与密度的关系[J].福建林学院学报,2005,25(1):1-4.
