Journal
ENVIRONMENTAL POLLUTION
Volume 144, Issue 2, Pages 703-714Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2005.12.040
Keywords
soil pollution; metal allocation; biomass production; photosynthesis; Populus tremula; Salix viminalis; Betula pendula; Picea abies
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Young Populus tremula, Salix viminalis, Betula pendula and Picea abies trees were grown together in large open-top chambers. The treatments were: without or with (Cu/Zn/Cd/Pb = 640/3000/10/90 mg kg(-1)) metal contamination in the topsoil, irrigation pH 3.5 or 5.5, and acidic or calcareous subsoil. Growth, metal allocation to foliage and wood, as well as leaf gas exchange were measured. Biomass was reduced in P. tremula and B. pendida by the metal-contaminated topsoil relative to uncontaminated topsoil, whereas in P. tremula photosynthesis and transpiration were decreased. These effects were related to the elevated foliar Zn accumulation in P. tremula. S. viminalis showed a significant reduction in growth and an increased Zn and Cd accumulation on acidic vs. calcareous subsoil. Acidic irrigation produced only a few significant effects. P. abies showed the lowest metal uptake and no growth response to metal contamination. (c) 2006 Elsevier Ltd. All rights reserved.
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