Interaction of soil moisture stress and ambient ozone on growth and yields of soybeans
1985
A:PS
Details
Title
Interaction of soil moisture stress and ambient ozone on growth and yields of soybeans
Publication Date
1985
Call Number
A:PS
Summary
Afield experiment was conducted in open-top chambers to detemine how interactions of soil moiture stress and exposure to ozone may affect soybean yields. Cultivars Williams and Forrest were grown in 1982 and Williams and Corsoy in 1983. Five levels of O3 - including charcoal-filtered (CF) and nonfiltered (NF) air - and two soil moisture regimes (averaging-0.05 M Pa, and about -0.40 M Pa at depths of 0.25 and 0.45 m) were employed. This report describes a significant interaction involving soil moisture stress (SMS) and the CF air treatments. Compared to the no-stress treatment, the combination of SMS and ambient O3 in 2 yr of experiments reduced yields by 25%. Exposure to ambient O3 without SMS reduced yields 5%. In CF air, SMS lowered yields 4%. Knowledge of this interaction increases the significance of O3 as an environmental phytotoxicant. Although cultivar differences existed, the soybean plants acclimated to SMS in CF air but not in NF air. Exposure to elevated ambient O3 may cause plants to lose tolerance to SMS. [AS/SS]
Journal Citation
v.75(4):472-477, PHYTOPATHOLOGY
Contact Information
harvest@worldveg.org
Record Appears in
Research > Published Articles