Abstract
Field grown loblolly pine (Pinus taeda L.) seedlings from two half-sibling families were exposed to three levels of acid precipitation and four levels of O3 in open top chambers at Auburn, AL. At the end of one growing season, dry weight and total N accumulation of seedlings was directly related. to rainfall acidity, possibly indicating a fertilizer response in the N deficient soil. Increasing O3 levels elicited an increase in N content of permanent tissues that was not related to a dry weight response. The origin of this N was believed to be increased internal translocation associated with enhanced premature needle senescence observed at higher O3 levels.
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Wright, L.M., Lockabyl, B.G., Meldahll, R. et al. The influence of acid precipitation and ozone on nitrogen nutrition of young loblolly pine. Water Air Soil Pollut 54, 135–142 (1990). https://doi.org/10.1007/BF00298660
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DOI: https://doi.org/10.1007/BF00298660