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Effects of Chronic Exposure to Simulated Power Plant Emissions and Ozone in Soybean Production
Author(s) -
Jones Herbert C.,
Noggle J. C.,
McDuffie Charlie
Publication year - 1988
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/jeq1988.00472425001700040030x
Subject(s) - dose , ozone , yield (engineering) , environmental science , sulfur dioxide , chemistry , field experiment , zoology , cultivar , toxicology , environmental chemistry , agronomy , biology , inorganic chemistry , materials science , organic chemistry , metallurgy , pharmacology
Acute SO 2 effects on vegetation are less likely because large point sources comply with ambient air quality standards and emission limits. The remaining concern is for direct effects of SO 2 , which might occur from exposure to intermittent, subacute dosages. Limited data exist for assessing chronic effects because experimental exposure regimes used in most effect studies on soybean [ Glycine max. (L.) Merr.] are from field and laboratory exposure regimes consisting of SO 2 , NO 2 , and O 3 dosages with a high degree of uncertainty. Chronic exposure of ‘Essex’ soybean to 0.06 µ L L −1 (0.06 ppm) O 3 for 8 h d −1 , 5 d wK +−1 , for 18 wk in the greenhouse caused a 34% reduction in yield compared to charcoal‐filtered air. Sulfur dioxide in combination with O 3 and NO 2 caused no additional reduction in yield, but lower dosages of SO 2 increased yields compared to the O 3 treatment, apparently by retarding O 3 ‐induced premature senescence. Emissions from a power plant had no adverse effect on yield on the cultivar Essex during a 3‐yr field study (1981–1983).