Effects of single and combined pollution of Pb, Cd and Cu on growth, metal uptake and translocation in rice

摘要

A field experiment was conducted to investigate the single and combined of lead (Pb), cadmium (Cd), and cooper (Cu) on the growth and development of rice plants and the uptake of these heavy metals by rice. The results revealed that the growth and development of rice plants were more affected by combined pollution than by single pollution. The Pb and Cd concentrations in grains under combined pollution are higher than that in single application at same level, indicating that rice grown in soils under combined pollution poses more risk to human health than under single pollution. Biological concentration factors (BCF) of different treatments of Cd and Cu change in the order as single pollution< combined pollution, implying that the upward transporting abilities of Cd and Cu absorbed by rice plants was significantly increased under combined pollution.