An inexpensive system for exposing plants in the field to elevated concentrations of CO2

Authors

  • T.W. ASHENDEN,

    Corresponding author
    1. High CO2 Research Group, Institute of Terrestrial Ecology, Bangor Research Unit, UCNW, Deiniol Road, Bangor, Gwynedd LL57 2UP, UK
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  • R. BAXTER,

    1. High CO2 Research Group, Institute of Terrestrial Ecology, Bangor Research Unit, UCNW, Deiniol Road, Bangor, Gwynedd LL57 2UP, UK
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  • C. R. RAFAREL

    1. High CO2 Research Group, Institute of Terrestrial Ecology, Bangor Research Unit, UCNW, Deiniol Road, Bangor, Gwynedd LL57 2UP, UK
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T. W. Ashenden, High CO2 Research Group, Institute of Terrestrial Ecology, Bangor Research Unit, UCNW, Deiniol Road, Bangor, Cwynedd LL572UP, UK.

ABSTRACT

An inexpensive, potentially mobile field exposure system is described which may be easily constructed by a small workshop. It may be operated as an open-top with a frustrum or covered with a polycarbonate ‘lid’. The system is cost-effective for CO2 exposure work because the small size allows provision of CO2-enriched atmospheres over prolonged periods at relatively low cost. A preliminary assessment of the chambers has been made and concentrations can be maintained at ±6% for a target atmosphere of 680 cm3 m−3 CO2 under normal operating conditions. Other chamber environmental conditions are reported.

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