Impact of ozone on soybean yield

Journal Article · · J. Environ. Qual.; (United States)

OSTI ID:6053185

Kress, L W; Miller, J E

Field-grown soybeans (Glycine max (L.) Merr., cv. Corsoy) were exposed to O/sub 3/ for 7 h daily (0900-1600 CST) for 56 d in open-top chambers. The air in the chambers was either charcoal-filtered or non-filtered, with various constant amounts of O/sub 3/ added. The randomized block design incorporated four replicates of six treatments: no chamber (0.042 ppm O/sub 3/ seasonal 7-h average); chamber with charcoal-filtered air (0.022 ppm O/sub 3/); and chambers with non-filtered air plus added O/sub 3/ to provide concentrations of 0.042, 0.064, 0.089, and 0.115 ppm. A linear reduction in seed weight per plant with increasing ozone dose (b(slope) = -87.18) was significant (P = 0.01), and yields were reduced 5, 23, 39, and 52% for the 0.042, 0.064, 0.089, and 0.115 ppm O/sub 3/ treatments, respectively, compared with the 0.022 ppm treatment. Significant (P = 0.01) linear reductions were also noted for filled pods per plant (b = 184.4), seeds per filled pod (b = -0.9955), weight per seed (b = -0.3794), and percent oil content (b = -12.33). Significant (P = 0.01) linear increases were noted for unfilled pods per plant (b = 58.11) and percent protein content (b = 20.58). A comparison of the open plots with the nonfiltered air chamber plots provided with the same concentration of O/sub 3/ revealed no significant chamber effects.

• Research Organization: Argonne National Lab., IL
• OSTI ID: 6053185
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 12:2; ISSN JEVQA
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
BIOLOGICAL EFFECTS
FOOD
GLYCINE HISPIDA
GROWTH
INHIBITION
LEGUMINOSAE
OZONE
PLANT GROWTH
PLANTS
POLLUTION
PRODUCTIVITY
SEEDS
SOYBEANS
VEGETABLES