Oxidant effects on forest tree seedling growth in the Appalachian Mountains [USA]
1982
Duchelle, S.F. | Skelly, J.M. | Chevone, B.I. (Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (USA). Dept. of Plant Pathology and Physiology)
Long range transport of episodic concentrationns of 0(,3) into the Appalachian Mountains of Virginia was recorded in the summer season of 1979 and 1980. Continuous monitoring of 0(,3) indicated monthly averages of 0.05 ppm 0(,3) and several periods averaged approx. 0.08 ppm 0(,3). Open-top chambers were used to test the effect of ambient doses of the pollutant on the growth of 8 planted forest tree species native to the area. Height growth was suppressed for all species at the end of the second growing season when grown in open plots (no chamber) and ambient chambers compared to those grown in charcoal-filtered air supplies chambers. Height growth trends of open ambient chamber filtered air chamber were consistent. Virginia pine and green ash were significantly taller (p
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