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Abstract
Unfumigated hybrid poplars (
Populus spp.) were compared with poplars of the same nine clones fumigated with 0.15 pprn ozone or 0.25 ppm sulfur dioxide. After 102 days, plant height and stem specific gravity were measured to determine whether specific gravity is altered by the fumigants and to compare that response to height suppression, an accepted measure of air pollution stress. Multivariate statistical analysis of the data for each clone revealed that the height of one clone and the stem specific gravities of six clones were suppressed by ozone. Specific gravity is an indicator of wood quality; the results of this experiment suggest that it may be a useful measure of the impact of air pollution on trees.
Citation
Patton, Roy L. 1981. Effects of ozone and sulfur dioxide on height and stem specific gravity of
Populus hybrids. Res. Pap. NE-471. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4p.
