摘要
运用区组试验设计,于沪陕高速公路信阳至南阳段4种路基边坡建立了28个植物群落观测试验小区。在测定相关指标的基础上,对不同土壤类型边坡物种多样性指标进行了比较分析,同时研究了路基边坡物种多样性与植被因子的相关性。结果表明:"紫穗槐+狗牙根+高羊茅"群落和"胡枝子+狗牙根+高羊茅"群落的物种多样性指数、丰富度指数及均匀度指数较高;物种多样性指标之间相关性显著;多样性指数、丰富度指数、均匀度指数与地上生物量相关性较强,与高度、盖度、保土作用系数相关性较差;植被保土作用系数与植被覆盖度密切相关,与植株高度的相关性显著。
According to group test planning, 28 plots of plant communities were established along the road slope of Hushaan Highway between Xinyang and Nanyang. Species diversity indices of the plants growing the slopes with different soil types were compared. Relationship between vegetation factors and species diversity was studied. The results showed that the correlations among the Shannon Weiner index, Margalef index and Pielou index of two communities were relatively higher： Amorpha f ruticosa ＋ Cynodon dact ylon ＋ Festuca elata community, and Lespedezabicolor＋C, dactylon＋Festucaelata community. A significant relationship was observed among species diversity indexes. The Shannon Weiner index, margalef index and pielou index were related remarkly with aboveground biomass, while there was a poor correlation between species diversity indices and the vegetation height, the vegetation coverage and the coefficient of soil conservation. The coefficient of soil conservation was closely related to the vegetation coverage, and remarkable correlated to the vegetation height.
出处
《西北林学院学报》
CSCD
北大核心
2012年第2期230-234,共5页
Journal of Northwest Forestry University
基金
河南省教育厅自然科学研究计划项目(2010B180014)
关键词
高速公路
边坡
植物群落
植被因子
物种多样性
highway
slope
plant communities
vegetation factors
species diversity
