用于研究大气二氧化碳浓度升高对农田有害生物影响的田间试验装置——改良的开顶式气室  

An improved top-open chamber for research on effects of elevated CO_2 on agricultural pests in field.

作　　者：陈法军[1] 戈峰[1] 苏建伟[1] 

机构地区：[1]中国科学院动物研究所农业虫鼠害国家重点开放实验室,北京100080

出　　处：《生态学杂志》2005年第5期585-590,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金重点项目(30330490);中国科学院知识创新工程项目(KSCX2-SW-103和KSCX3-IOZ-04);国家重点基础研究发展规划资助项目(G2000016209)。

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。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.

关 键 词：开顶式气室 二氧化碳 自动系统 温度 相对湿度 

分 类 号：S4-3[农业科学—植物保护]