Residual Regularity in Tissues of Layer after Combined Exposure to Lead （ Pb） and Cadmium （ Cd）

摘要

[Objective]The study was to investigate residual regularity in tissues of layer after combined exposure to lead (Pb)and/or cadmium (Cd).[Method]Lead acetate (100 mg/L)and/or cadmium chloride (50 mg/L)were administered in drinking water to 120 individuals of 40-week-old hyline layers for 8 weeks.[Result]Compared with the Cd group,the Cd content in various tissues,except kidney and femur,in Cd+Pb group all increased,but the difference was not significant (P>0.05).The Cd contents in kidney and femur in Cd group were significantly higher than that in Cd+Pb group.Compared with the group Pb,the Pb contents in breast muscle and kidney in Cd+Pb group decreased significantly (P<0.05);the Pb contents in femur decreased extremely (P<0.01);while the Pb contents in leg muscle,heart and spleen increased significantly (P<0.05);the Pb contents in liver and glandular stomach were almost the same.Compared with the control group,the Cd content in various tissues in Pb group increased significantly (P<0.05);no significant changes were observed for Pb content in Cd group.[Conclusion]Deposit of Pb and Cd in poultry body had complex interaction.