【摘要】 以北京世纪坛绿地为研究点,利用Li-6400便携式光合仪测定16种常用绿化植物的叶片光合、蒸腾速率,结合植物绿量,估算常见绿化植物的生态调节服务.结果表明,绿化植物光合速率日变化呈现单峰或双峰的变化趋势,而蒸腾速率日变化以双峰变化趋势居多,第1个峰值出现在09:00—11:00,第2个峰值出现15:00—17:00;植物叶片日固碳量为1.80⁸.73g·m^-2·d^-1,释氧量为1.31⁶.35g·m^-2·d^-1,释水量为1.53⁴.80kg·m^-2·d^-1,蒸腾吸热量为3.71¹1.59 MJ·m^-2·d^-1,降温值为0.25⁰.77℃;单株植物的固碳量为21.97¹ 550.64g·d^-1,释氧量为15.98¹ 127.74g·d^-1,释水量为9.48⁸77.08kg·d^-1,蒸腾吸热量为23.03² 116.26 MkJ·d^-1;聚类分析结果表明,阔叶乔木国槐、毛白杨和垂柳单株尺度的生态调节服务最强,在北京绿地绿化中可优选以上阔叶乔木,灌木植物连翘和针叶乔木油松有较高的生态调节服务,也是绿化植物的优选品种,草本早熟禾单株水平生态调节服务最差,但通过大面积的铺设,可实现其生态价值和景观价值.更多还原

【Abstract】 A total of 16 representative greening tree species at China Century Altar Beijing were chosen to estimate their ecological regulation service.Photosynthetic and transpiration rates were measured with Li-6400 portable system,which were used to calculate carbon sequestration,oxygen emission,humidification and heatabsorbing of greening plants.Diurnal curve of net photosynthesis and transpiration in the 16 experimental species showed one or two peaks:the first peak from 09:00-11:00,a second peak from 15:00-17:00.Leaf carbon sequestration was found to be 1.80-8.73 g·m^-2,oxygen emission 1.31-6.35 g·m^-2,humidification1.53-4.80 kg·m^-2,heat-absorbing 3.70-11.57 MJ·m^-2,cooling values 0.25-0.77 ℃.Individual plant carbon sequestration was found to be 21.97-1 550.64 g,oxygen emission 15.98-1 127.74 g,humidification 9.48-877.08 kg,and heat-absorption 22.99-2 112.82 MJ.Cluster analysis showed that broadleaf trees such as Sophora japonica Linn.,Populustomentosa and Salix babylonica had strongest regulation service,shrub and coniferous trees of Pinustabulaeformis and Amygdalustriloba had high ecological service,those trees should be preferred species.Kentucky bluegrass has the worst regulation service,but ecological and landscape value could be realized by considering a larger area.更多还原