长沙市4种园林植物蒸腾耗水特性研究

以3年生苗为试材,采用盆栽方法,对长沙市4种园林植物细叶萼距花、麦冬、吉祥草、葱兰的耗水特性进行了研究,结果表明:4种植物在全光照下的耗水速率均比遮荫条件下高.在全光照和遮荫条件下,4种园林植物的蒸腾耗水速率大小均是细叶萼距花＞葱兰＞麦冬＞吉祥草;细叶萼距花、麦冬、吉祥草、葱兰等4种园林植物的日耗水进程一致,都是6:0...

Characteristics of water consumption by transpiration of four garden plants in Changsha City

Characteristics of water consumption by transpiration of four garden plants in Changsha City,namely,Cuphea hyssopifolia,Ophiopogon japonicus,Reineckea carnea,Zephyranthes candida,were studied by using 3-year-old pot seedlings.The results showed that the water consumption rates of four garden plants under sunshine were higher than that under shade.And the water consumption rates were Cuphea hyssopifoliaZephyranthes candidaOphiopogon japonicusReineckea carnea.The water consumption of four garden plants in a day was the lowest at 6 ∶ 00— 8 ∶ 00,which was the highest at 12 ∶ 00— 14 ∶ 00.Under sunshine,the water consumption rate of Cuphea hyssopifolia in August was the highest（586.34 g/m2）,that was the lowest in November which was 41.6% of that in August.The water consumption rate of Ophiopogon japonicus in August（397.15 g/m2） was similar to that in September（420.19 g/m2）.The water consumption rate of Reineckea carnea（420.19 g/m2） and Zephyranthes candida（550.75 g/m2） in September was the highest.The water consumption rate of four garden plants in November was the lowest.