香根草与紫穗槐配置方式对护坡地植物群落特征的影响

经过2005-2006年连续2年的定点调查与分析，研究了香根草Vetiveria zizanioides与紫穗槐Amorpha fruticosa不同配置组合类型对护坡地植物群落的影响，结果表明：1）紫穗槐单种护坡有利于增加群落中定居的植物种数量，但香根草在阴坡上单种护坡不利于其他植物定居。2）群落多样性指数、均匀度指数与香根草物种优势度均呈极显著线性负相关；群落优势度指数与香根草物种优势度呈极显著线性正相关。3）香根草种群在群落中影响比紫穗槐大，但受坡向和紫穗槐制约。4）阳坡有利于香根草种群的发展，阴坡则起抑制作用；阳坡上紫穗槐植株高，茎秆粗，但分蘖少，而阴坡上则相反。5）香根草与紫穗槐在阳坡上间作对香根草生长不利，但有利于紫穗槐，紫穗槐性状好于其单种方式；香根草与紫穗槐在阴坡上间作有利于香根草种群，但紫穗槐性状却不如其单种方式。

Effects of different allocation patterns of Vetiveria zizanioides and Amorpha fruticosa for slope protection on plant community characteristics

Effects of different allocation patterns of vetiver(Vetiveria zizanioides) and Amorpha fruticosa for slope protection on plant community characteristics were studied from 2005 to 2006.The results indicated: 1) A.fruticosa monocropped pattern increased the number of the plant species,but for V.zizanioides monocropped for pattern on the north-facing slopes,it rejected other plant species.2) The vetiver dominance was significantly negatively correlated with the community diversity and evenness index but positi...