Effect of ozone on photosynthesis, vegetative growth and productivity of prunus salicina' in the San Joaquin Valley of California. (Year 3). Final report
Technical Report
·
OSTI ID:7118317
In 1988, an experimental orchard of Cassleman plum (Prunus salicina) was planted in open-top-fumigation chambers and exposed for 4 growing seasons to three ozone concentrations near Fresno, California. During the third year of the study, mean 12-h ozone levels (1991) were 0.034 ppm in the charcoal filtered chambers, 0.050 ppm in the ambient air chambers, 0.94 ppm in the ambient plus added ozone chambers and 0.058 ppm in the no-chamber field plots. Chronic ozone stress has a detrimental effect on photosynthesis, stomatal conductance, leaf appearance and retention, trunk growth, and yield. Yield was 19.8 kg per tree in the charcoal filtered chambers, 15.9 kg/tree in the ambient air chambers, 6.8 kg/tree in the ambient air plus ozone chambers and 15.8 kg/tree in the no-chamber plots. Premature leaf drop and a 35 percent yield loss occurred in 1990 at mean daily ozone concentrations greater than 0.09 ppm (the California Ambient Air Quality Standard). In 1991 the yield loss increased to 65%, indicating cumulative impact on long term productivity.
- Research Organization:
- California Univ., Davis, CA (United States)
- OSTI ID:
- 7118317
- Report Number(s):
- PB-94-218856/XAB; ARB-A--033-128
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
09 BIOMASS FUELS
090700* -- Biomass Fuels-- Resources-- (1990-)
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
COMPILED DATA
DATA
ENVIRONMENTAL EFFECTS
GROWTH
INFORMATION
NUMERICAL DATA
OZONE
PLANT GROWTH
PLANTS
PRODUCTIVITY
TREES
090700* -- Biomass Fuels-- Resources-- (1990-)
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
COMPILED DATA
DATA
ENVIRONMENTAL EFFECTS
GROWTH
INFORMATION
NUMERICAL DATA
OZONE
PLANT GROWTH
PLANTS
PRODUCTIVITY
TREES