Relations between soil properties and selected heavy metal concentrations in spring wheat (Triticum aestivum L.) grown in contaminated soils

Citation
Zr. Nan et al., Relations between soil properties and selected heavy metal concentrations in spring wheat (Triticum aestivum L.) grown in contaminated soils, WATER A S P, 133(1-4), 2002, pp. 205-213
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
WATER AIR AND SOIL POLLUTION
ISSN journal
0049-6979 → ACNP
Volume
133
Issue
1-4
Year of publication
2002
Pages
205 - 213
Database
ISI
SICI code
0049-6979(200201)133:1-4<205:RBSPAS>2.0.ZU;2-O
Abstract
Spring wheat was grown in soils near a non-ferrous metals mining and smelti ng base in Baiyin city, Gansu province, P.R. China. The area studied is 501 km(2). Some of the croplands had been contaminated by heavy metals mainly through wastewater irrigation or aerial deposition. The soil samples were a nalyzed for pH, organic matter and available phosphorous (P); also for tota l cadmium (Cd), lead (Pb), copper (Cu) and zinc (Zn) contents. Spring wheat grains were also analyzed for heavy metals. The results were interpreted u sing multiple linear correlation and stepwise regression analyses. The incr ement of total soil contents of selected heavy metals could enhance grain C d accumulation, and the increment of total Zn content of soil could lower t he grain Pb accumulation. The correlations were markedly increased by inclu ding other soil properties for grain Cd and Pb. Stepwise regression analyse s indicated that the effect of soil pH and available P on the uptake of gra in Cd were greater than that of the other total soil contents of heavy meta ls. Grain Cd and Pb could be reliably predicted by the total soil contents of Cd and Pb while the uptake of grain Zn and Cu were not satisfactorily pr edicted.