石质边坡植被建植后1年内群落动态

为了解石质边坡人工植被建植初期群落的动态，依托实际工程，采用常规群落调查法，对高速公路石质边坡人工植被进行了为期1年的跟踪调查。结果表明，在观察期内，样地中共出现了47种植物，分属13科41属，主要为禾本科、豆科和菊科三大科草本植物；群落物种数量组成发生季节性变化，最大值出现在2009年9月，记录物种数21种，最小值出现在2010年2月，记录物种数5种。边坡群落中不同功能群植物分布结果表明，豆科植物表现出良好的适应性；植物生活型分布结果表明，多年生植物生长相对稳定；植被建植1年内黑麦草（Lolium perenne）始终占据明显优势；群落类型为黑麦草草本群落。群落物种呈均匀分布，没有分层现象；群落丰富度指数、Shannon Wiener指数和Simpson指数随季节波动变化，Pielou均匀度指数变化不明显；黑麦草重要值与群落物种丰富度指数、Shannon Wiener指数、Simpson指数、Pielou均匀度指数呈显著负相关。

Community dynamics of artificial vegetation on rocky slope in the first year after planting

In order to understand the dynamic changes of artificial vegetation community of rocky slope in the initial planting stage, based on the actual project and taking conventional community survey method, the artificial vegetation of highway rocky slope have been tracked and investigated for one year. The results showed that during the observation period, 47 species of plants in 46 genus and 13 families had been found in the plots; most of them were herbs belonged to three families: Gramineae, Leguminosae and Compositae. Community species quantitative composition showed seasonal changes and 21 species was recorded (maximum) in September 2009, while 5 species was recorded (minimum) in February 2010. The results of plant distribution in different functional groups showed that legumes had performed better adaptability. The results of distribution of plant life forms showed that perennial plants grew relatively stable. The Lolium perenne always occupied an obvious advantage in the first year after planting and the community type was the L. perenne community. The distributions of community species were uniform and there was no stratification phenomenon. Community richness index, Shannon Wiener index and Simpson index showed seasonal fluctuations, while the change of Pielou evenness index was not notable. The important value of L.perenne and community species richness index, Shannon Wiener index, Simpson index, Pielou evenness index had a significant negative correlation.