An Open‐Top Field Chamber to Assess the Impact of Air Pollution on Plants

Journal of Environmental Quality - Tập 2 Số 3 - Trang 365-368 - 1973
Allen S. Heagle, Denis E. Body, Walter W. Heck1,2,3,4
1Mechanical Engineer, Environmental Protection Agency, Nat. Environ. Res. Cent., Research Triangle Park, North Carolina 27711
2Plant Pathologist, ARS, USDA, Dep. of Plant Pathology, North Carolina State Univ., Raleigh
3Plant Physiologist, ARS, USDA, Dep. of Botany, North Carolina State Univ., Raleigh, respectively.
4The authors thank Ralph E. Baudendistel for help in chamber construction and Walter J. Willis for help in plant culture.

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AbstractReasonable air pollution control policies depend upon a comparison of the costs of air pollution losses with the costs of controls. Present estimates of national economic losses to agricultural and ornamental vegetation are based primarily on field observations and partially on growth and yield data obtained from closed‐top field chambers and greenhouses. This research describes the design and evaluation of an open‐top field chamber that was developed to provide an environment more closely resembling ambient conditions than the environment found in closed‐top chambers.Temperature and relative humidity within open‐top chambers were similar to ambient conditions. Direct sunlight reached the plants for a portion of each day and rain entered, although not always uniformly over the chamber base. Chambers receiving charcoal‐filtered air protected sensitive ‘Bel W3’ tobacco plants (Nicotiana tabacum L.) from ambient ozone concentrations. Plants growing in chambers receiving unfiltered air or in ambient air plots were severely injured.

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Journal of Environmental Quality

Tập 2 Số 3

365-368

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