Injury and yield responses of differentially irrigated cotton to ozone (journal version)

Technical Report · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6277965

Temple, P J; Kupper, R S; Lennox, R W; Rohr, K

The study was conducted to determine the influence of drought stress on foliar injury and yield responses of field-grown cotton. Cotton grown on Hanford coarse sandy loam at three levels of soil water in open-top chambers was exposed to seasonal 12-h O/sub 3/ concentrations in Riverside, CA. At ambient O/sub 3/ concentrations severely drought-stressed (SS) cotton averaged 25% foliar injury, while moderately stressed (SO) plants averaged 56%, and optimally watered (OW) plants averaged 68% foliar injury. Lint and seed yields were significantly reduced by O/sub 3/ in OW and SO plots, while SS cotton showed no yield reductions, except at 0.111 microliters per liter. Yield reductions were primarily attributable to fewer numbers of bolls. The relative similarity in responses of OW and SO cotton was attributed to adaptation to drought stress by SO plants, which maintained the sensitivity of moderately stressed cotton to O/sub 3/. These results suggest that low or moderate drought stress would have relatively little effect on the response of irrigated cotton to O/sub 3/.

• Research Organization: Environmental Protection Agency, Corvallis, OR (USA). Environmental Research Lab.
• OSTI ID: 6277965
• Report Number(s): PB-89-144521/XAB; EPA-600/J-88/223
• Country of Publication: United States
• Language: English

Related Subjects

500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
COTTON PLANTS
DROUGHTS
ENVIRONMENTAL IMPACTS
GROWTH
INJURIES
IRRIGATION
MAGNOLIOPHYTA
MAGNOLIOPSIDA
MATHEMATICS
OZONE
PLANT GROWTH
PLANTS
REGRESSION ANALYSIS
STATISTICS