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Effects of Chronic Doses of Ozone and Sulfur Dioxide on Injury and Yield of Soybeans in Open‐Top Field Chambers 1
Author(s) -
Heagle Allen S.,
Heck Walter W.,
Rawlings John O.,
Philbeck Robert B.
Publication year - 1983
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1983.0011183x002300060037x
Subject(s) - ozone , pollutant , sulfur dioxide , zoology , biology , glycine , carbon dioxide , yield (engineering) , air pollutants , sulfur , toxicology , agronomy , chemistry , air pollution , ecology , biochemistry , amino acid , materials science , organic chemistry , metallurgy
Soybeans, Glycine max (L.) Merr. ‘Davis’, were exposed for 7 h day −1 (111 days) to six concentrations of ozone (O 3 ) and for 4 h day −1 (101 days) to four concentrations of sulfur dioxide (SO 2 ), singly and in mixtures (24 combinations). The pollutant concentrations were selected to span those that occur in major soybean production areas of the USA. The pollutant dose‐yield response relationships were modeled using regression analyses and a Weibull model analysis. Both analyses indicated that a dose of O 3 typical for soybean production areas (seasonal 7—h day −1 mean of 0.055 ppm v/v) caused a seed weight decrease of 20% compared to a control dose of 0.025 ppm O 3 . Sulfur dioxide at levels known to exist regionally in the USA (seasonal 4—h day −1 mean of <0.026 ppm SO 2 ) did not cause injury or affect soybean yield. Neither pollutant changed the dose‐response relationships for the other except at high concentrations where the effect of mixtures was less than the additive effects of the pollutants singly. The dose‐response relationships were similar for each of two soil types.