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为了探索出在CO2浓度和水分双因子影响下的城市绿化模式,本文以北京市典型的绿化灌木树种大叶黄杨为研究对象,采用盆栽试验,研究3种不同水分胁迫水平(SWS为55%~75%、MWS为65%~85%、LWS为75%~95%)和3种CO2浓度(400×10-6、600×10-6、800×10-6)水平下对大叶黄杨的景观功能和生态服务功能的影响,寻求综合考虑CO2浓度-水分-景观-生态关系的城市绿化模式。研究发现,SWS处理下,景观功能受到抑制,但生态服务功能却随CO2浓度的增加而得到提升;而在LWS和MWS处理下,增大CO2浓度,能够促进大叶黄杨的生长,并使大叶黄杨景观和生态服务功能发挥到最大限度。综合以上研究结果,可认为将土壤水分控制在中度水分胁迫条件下(MWS),大叶黄杨在CO2浓度不断升高的现有环境中生长最为有利,它的景观和生态服务功能能够发挥到最大限度,是一种优化的城市绿化模式。
In order to explore the urban greening mode under the influence of CO2 concentration and water factor, this paper took Euonymus japonicus as a typical greening shrub species in Beijing as the research object. Pot experiments were conducted to study the effects of three different water stress levels (SWS 55% 75%, MWS 65% ~ 85%, LWS 75% ~ 95%) and three CO2 concentrations (400 × 10-6,600 × 10-6,800 × 10-6) Landscape function and ecological service function, and to seek a model of urban greening considering CO2 concentration-water-landscape-ecology relationship. The results showed that under the treatment of SWS, the landscape function was inhibited, but the ecosystem service function was enhanced with the increase of CO2 concentration. However, under the treatment of LWS and MWS, the increase of CO2 concentration could promote the growth of Euonymus japonicus, Ye Huang landscape and ecological service functions to maximize. Based on the above results, it can be concluded that under the conditions of moderate water stress (MWS), Euonymus japonicus is best grown in the existing environment with increasing CO2 concentration, and its landscape and ecological service functions can be played to At best, it is an optimized model of urban greening.