【摘要】 开顶式气室可精准控制大气CO2(或其它气体成分)的浓度,使之稳定在一个特定的水平,为研究未来大气CO2浓度升高(或其它气体成分变化)对植物害虫天敌之间相互关系的影响提供了条件。该装置由CO2气源、CO2浓度测控系统和气室3部分组成。气室又包括无色透明玻璃(2.5mm厚)室壁,正八边形的铁框架和中空底座,以及换气扇组成的通风系统4部分。能实现气室内CO2浓度的自动控制。经试验检测,气室内CO2浓度、温度、相对湿度等环境条件的水平分布和垂直分布都很均匀,与自然环境十分接近。该气室设计的结构合理,使用性能稳定,可广泛应用于大气特定成分变化对生态系统影响的研究。更多还原

【Abstract】 An improved top-open chamber was designed to study the effects of elevated CO 2 on the interactions across host plants,pests and their natural enemies.This system includes CO 2 source,CO 2-measure-control system and top-open chamber.The top-open chamber,consist of no-color and transparent grass (2.5-mm thickness) wall,iron frame and hollow pedestal (octagon),and ventilation (eight 0.235 m 3·s -1 exhaust fans per side).It can automatically control CO 2 concentrations.CO 2 concentrations,temperature and relative humidity were all well distributed at horizontal and vertical in top-open chamber,which is similar to natural environment.It was perceived that the setup of this apparatus was reasonable,and the usage performance was stable.We suggested that the improved top-open chamber could be used to study the effect of concentration changes of some atmospheric components on agriculture and ecosystem.更多还原