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本文以浙江省常见的16种园林植物为研究对象,利用LI-6400便携式光合作用测定系统测定其光合响应曲线,分析其在光能利用率(LUE)、CO2固定效率(CE)、水分利用率(WUE)方面的能力,评价其改善环境的效益。研究结果表明:在大乔木中法国梧桐和乐昌含笑蒸腾速率(Tr)较强,说明其在降温增湿方面潜力较大,而青冈和香樟的光合速率和羧化效率较高,说明二者在光能利用、固定CO2和释放O2方面的能力较强;小乔木中牡丹木槿、西府海棠和石楠的光能利率、水分利用率和羧化效率均高于其它树种,日本晚樱、牡丹木槿、西府海棠、白玉兰等对弱光的利用潜力较强,总体上在夏季落叶种的光能利用率、CO2固定效率、水分利用率大部分优于常绿种,配置时可考虑适当增加落叶树种;在灌木中茶梅的光合速率较低而蒸腾速率较高,说明茶梅在固定CO2方面能力较弱,而在增湿方面能力则较强,含笑则反之,红叶石楠在光能利率、水分利用率和羧化效率方面优于其它树种,可作为园林配置中理想的灌木树种。
In this paper, 16 species of common ornamental plants in Zhejiang Province were selected as the research object. The photosynthetic response curve was measured by LI-6400 portable photosynthesis system. The effects of LUE, CO2, CE, (WUE) capacity, to evaluate its environmental benefits. The results showed that trumpet (Tr) of Sycamore and Lechang in large trees showed strong trilting potential, which indicated that the photosynthetic rate and carboxylation efficiency of Cyclobalanopsis glauca and Cinnamomum camphora were high, indicating that both Light energy utilization, CO2 fixation and O2 release capacity are stronger; small trees in the light of Peony hibiscus, West Begonia and heather light energy rate, water use efficiency and carboxylation efficiency are higher than other species of Japanese cherry, peony hibiscus , Xifu Begonia, magnolia and other low light potential utilization is strong, the overall light energy efficiency of summer deciduous species, CO2 fixation efficiency, water use efficiency are mostly better than evergreen species, the allocation can be considered appropriate to increase deciduous trees The photosynthetic rate and transpiration rate of Camellia sinensis in shrubs are lower, indicating that Camellia plum is less capable of fixing CO2 while its ability in humidifying is stronger than that of smiling. On the contrary, Water use efficiency and carboxylation efficiency is superior to other species, can be used as an ideal shrub species in the garden configuration.