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cje ›› 2005, Vol. ›› Issue (5): 585-590.

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An improved top-open chamber for research on effects of elevated CO2 on agricultural pests in field

CHEN Fajun, GE Feng, SU Jianwei   

  1. State Key Laboratory of Integrated Management of Pests and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2003-10-06 Revised:2004-01-18 Online:2005-05-10

Abstract: An improved top-open chamber was designed to study the effects of elevated CO2 on the interactions across host plants,pests and their natural enemies.This system includes CO2 source,CO2-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 m3-1 exhaust fans per side).It can automatically control CO2 concentrations.CO2 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.

Key words: Forest fire risk zone, GIS, Daxing'an Mountains

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