七种园林植物光合生理特性研究

以广州市南沙区的7种园林植物花叶鸭脚木、大红花、水鬼蕉、朱蕉、鹅掌藤、绿朱蕉、射干为研究对象,利用Li—6400便携式光合测定系统测定其光合生理特性,以期选出光合能力强的园林植物;同时,以植物的光合指标作为依据进行聚类分析。结果表明:植物的净光合速率为水鬼蕉鹅掌藤大红花射干绿朱蕉花叶鸭脚木朱蕉;7种园林植物可分为3类,第1类有花叶鸭脚木和鹅掌藤,第2类有大红花、朱蕉、绿朱蕉和朱蕉,第3类为水鬼蕉。水鬼蕉和鹅掌藤的净光合速率和蒸腾速率高,光合能力、改善生态环境的功能强。

Photosynthetic characteristics of seven landscape plants

In order to select landscape plants with high photosynthetic capacity,the photosynthetic characteristics of sen-ven landscape plants Schefflera odorata ‘Variegata’,Hibiscus rosa-sinensis ,Hymenocallis littoralis ,Cordyline frutico-sa,Schefflera arboricola,Cordyline fruticosa ‘Green Leaves'and Belamcanda chinensis were analyzed in Nansha of Guan-gzhou,Guangdong Province.Results showed that photosynthetic rate of plants decreased in the order of H.littoralis.>S.arboricola >H.rosa -sinensis >B.chinensis >C.fruticosa ‘Green Leaves'>S.odorata ‘Variegata’>C. fruticosa;the photosynthetic index of seven plants were grouped using cluster analysis:the first kind included S.odorata‘Variegata’and S.arboricola,the second kind included H.rosa-sinensis,B.chinensis,C.fruticosa and C.frutico-sa ‘Green Leaves'and belonged to the third kind.H.littoralis and S.arboricola have a strong improving environment function with high net photosynthetic rate and transpiration rate.