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Crop Effects from Air Pollutants in Air Exclusion Systems vs. Field Chambers
Author(s) -
Olszyk David M.,
Bytnerowicz Andrzej,
Kats Gerrit,
Dawson Philip J.,
Wolf Joanne,
Thompson C. Ray
Publication year - 1986
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1986.00472425001500040019x
Subject(s) - medicago sativa , plant growth , environmental science , air pollution , agronomy , biology , ecology
Crop growth and yield effects from exposure to ambient O 3 were evaluated with air exclusion systems and open‐top or closed‐top field chambers. Alfalfa ( Medicago sativa L.) studies with three harvests in 1983 and three in 1984 indicated that during the summer growing season, plants respond similarly to ambient O 3 when exposed in air exclusion systems and inboth open‐ and closed‐top chambers. Filtering ambient O 3 in general increased plant growth in both air exclusion systems and chambers. Plant growth was most similar between nonfiltered air exclusion systems chambers and outside plots, somewhat altered in opentop chambers, and greater in closed‐top chambers than the other facilities. During the fall, alfalfa growth was similar in air exclusion systems and outside plots, whereas growth was greater in open‐top chambers than in outside plots.