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Injury and Yield Response of Cotton to Chronic Doses of Ozone and Sulfur Dioxide
Author(s) -
Heagle Allen S.,
Heck W. W.,
Lesser V. M.,
Rawlings J. O.,
Mowry F. L.
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/jeq1986.00472425001500040011x
Subject(s) - cultivar , fiber crop , yield (engineering) , crop , gossypium hirsutum , malvaceae , ozone , crop yield , horticulture , agronomy , toxicology , biology , chemistry , materials science , organic chemistry , metallurgy
Abstract Knowledge of relationships between chronic doses of O 3 and crop yield is required to set air quality standards that protect agricultural interests and to determine the need to develop resistant cultivars of sensitive species. Open‐top field chamber studies have provided some information of this type for a few crop species including one western cullivar of cotton ( Gossypium hirsutum L.). Our objectives were to measure relationships between chronic doses of O 3 and yield of an eastern cotton cultivar and to determine whether these relationships could be affected by chronic doses of SO 2 . ‘Stoneville 213’ was exposed in open‐top field chambers to five doses of O 3 (seasonal 7 h d −1 means from 0.026–0.104 µ L L −1 ) and four doses of SO 2 (seasonal 4 h d −1 means from 0.00–0.35 µ L L −1 ), singly, and in all possible combinations. Exposures began when first foliar leaves were expanding and continued until final harvest. Stoneville 213 was sensitive to O 3 ‐induced yield decrease and regression analyses provided models describing this relationship. Compared to cotton yield in charcoal‐filtered‐air chambers, the measured decrease of cotton yield at levels of O 3 that occurred during the 1982 season at Raleigh, NC was 11%. Doses of SO 2 at levels greater than those occurring regionally did not significantly affect cotton and did not significantly change cotton response to O 3 .