5种红豆杉的生态效益比较

在野外自然条件下，测定了中国红豆杉（Taxus chinensis）、云南红豆杉（T. yunnanensis）、东北红豆杉(T. cuspidata)、南方红豆杉（T. chinensis var. mairei）和曼地亚红豆杉（T. media cv Hicksii）等5种红豆杉植物的叶面积指数、光合与呼吸速率、蒸腾速率等指标，计算了释氧固碳量和降温增湿量，比较了它们之间的生态学效应。结果表明，不同种类红豆杉的生态效益存在差异，降温增湿和释氧固碳能力均以曼地亚红豆杉最强，南方红豆杉和云南红豆杉次之，东北红豆杉和中国红豆杉相对较弱。应加强红豆杉在城市园林绿化中的应用研究，以充分发挥红豆杉的生态效益。

Comparison of the Ecological Benefits on Five Species of Taxus

An outdoor experiment was conducted to calculate the leaf area index, photosynthetic and respiration rate on five species of Taxus chinensis, T. yunnanensis, T. cuspidat, T. chinensis var. mairei and T. media planted in rural area. The cooling and humidification capability of five species were calculated. A comparative study on the ecological benefits of five species of Taxus was made．It’s the capability of keeping balance between carbon and oxygen in atmosphere and the capability of cooling and humidification．The results indicated that ecological effects were different among different Taxues species: T. media was the strongest, followed by T. cuspidata , T. chinensis var. mairei and T. yunnanensis．It was suggested that researches on the application of yews in urban area should strengthened to give full play to their ecological effects.