期刊
ENVIRONMENTAL POLLUTION
卷 188, 期 -, 页码 144-152出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2014.02.003
关键词
Soil acidification; Orchard; Vineyard; Metal bioavailability; Earthworm
资金
- National Natural Science Foundation [Y 311111031]
- 100 Talents Program of the Chinese Academy of Sciences
The bioavailability of Cu, Zn, Pb and Cd from field-aged orchard soils in a certified fruit plantation area of the Northeast Jiaodong Peninsula in China was assessed using bioassays with earthworms (Eisenia fetida) and chemical assays. Soil acidity increased with increasing fruit cultivation periods with a lowest pH of 4.34. Metals were enriched in topsoils after decades of horticultural cultivation, with highest concentrations of Cu (132 kg(-1)) and Zn (168 mg kg(-1)) in old apple orchards and Pb (73 mg kg(-1)) and Cd (0.57 mg kg(-1)) in vineyard soil. Earthworm tissue concentrations of Cu and Pb significantly correlated with 0.01 M CaCl2-extractable soil concentrations (R-2 = 0.70, p < 0.001 for Cu; R-2 = 0.58, p < 0.01 for Pb). Because of the increased bioavailability, regular monitoring of soil conditions in old orchards and vineyards is recommended, and soil metal guidelines need reevaluation to afford appropriate environmental protection under acidifying conditions. (C) 2014 Elsevier Ltd. All rights reserved.
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