Air pollutants affect the relative growth rate of hardwood seedlings. Forest service research paper (final)

Technical Report · Thu Jan 01 04:00:00 EST 1981

OSTI ID:6025209

Jensen, K F

One-year-old seedlings of yellow-poplar (Liriodendron tulipifera), eastern cottonwood (Populus deltoides), and white ash (Fraxinus americana) were divided into four groups. One group Served as the control, and the other groups were fumigated for 12 hours per day with either 0.1 ppm O3, 0.2 ppm SO2, or 0.1 ppm O3 plus 0.2 ppm SO2. Two or three seedlings of each species were harvested twice a week for 6 weeks, and leaf area and new growth weight were determined. Data on leaf area and new growth were transformed to natural logarithms and fitted with a linear regression model. Relative growth rate was positive in all species-treatment combinations, but varied with fumigation treatment. Relative leaf area growth rate of the cottonwood and yellow-poplar seedlings was reduced by all three fumigation treatments. White ash growth was not analyzed because statistically significant differences were not found.

• Research Organization: Forest Service, Broomall, PA (USA). Northeastern Forest Experiment Station
• OSTI ID: 6025209
• Report Number(s): PB-81-175275
• 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
CHALCOGENIDES
GROWTH
MATHEMATICS
OXIDES
OXYGEN COMPOUNDS
OZONE
PLANT GROWTH
PLANTS
POLLUTION
POPLARS
SEEDLINGS
STATISTICS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TREES