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Yield Reduction of Soybean Due to Exposure to Sulfur Dioxide and Nitrogen Dioxide in Combination
Author(s) -
Amundson Robert G.
Publication year - 1983
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/jeq1983.00472425001200040003x
Subject(s) - yield (engineering) , point of delivery , chemistry , sulfur dioxide , horticulture , nitrogen , cultivar , nitrogen dioxide , materials science , biology , metallurgy , inorganic chemistry , organic chemistry
Two soybean [ Glycine max (L.) Merr.] cultivars, ‘Beeson’ and ‘Hark,’ were grown in the field and exposed to SO 2 alone and in combination with NO 2 in open‐top chambers supplied with charcoal‐filtered air to remove ambient O 3 . The exposures were for 56 midday hours during the pod‐filling period at concentrations of approximately 481 or 1335 µ g m −3 SO 2 with or without 115 µ g m −3 NO 2 . 3 Visible injury was produced only on plants exposed to the higher SO 2 concentration, but senescence was accelerated in several treatments (i.e., control about the same as low SO 2 < low SO 2 + NO 2 < high SO 2 < high SO 2 + NO 2 . The treatments of high SO 2 alone reduced the yields of Hark 26% and Beeson 9%; NO 2 with high SO 2 reduced the yields 35% for Hark and 31% for Beeson. The lower concentration of SO 2 alone reduced the yields of Hark 20% and Beeson 6%; the presence of NO 2 at the lower SO 2 concentration did not increase the effect on yield reduction in either cultivar. These results suggest that (in the absence of ambient O 3 ) NO 2 in combination with SO 2 can reduce soybean yield more if the SO 2 dose is above a threshold value.