Brams E, Anthony W
Sci Total Environ. 1983 Jun;28:295-306. doi: 10.1016/s0048-9697(83)80027-8.
Two experiments measured quantities of soil Cd and Pb in wheat grain and eggs of laying hens that ingested the grain for 34 days and in liver and muscle after a 30 day withdrawal period. Soil Cd (0.6 to 2.9 ppm) induced a direct and linear accumulation in grain which ranged from 1.25 to 5.36 ppm. No response to soil Pb (4.0 to 18.7 ppm) was detected in grain which averaged 2.7 +/- 1.5 ppm. Ingestion by hens of 1500 to 11,000 micrograms Cd kg-1 body wt induced 1.87 ppm in dry albumin but Cd was not detectable in yolk, liver or muscle. Lead ingested after 34 days averaged 13,386 micrograms kg-1 body wt induced a mean of 3.88 and 4.71 micrograms Pb g-1 in yolk and albumin, respectively, but none in liver and muscle. From the soil pool 0.004% Cd and 0.02% Pb accumulated in the grain; 1.6% of grain Cd accumulated in the eggs. Only minuscule quantities (1 X 10(-5#of the Cd and Pb in the soil pool were transferred and retained in hen tissues via ingestion of the grain.
两项实验测量了摄入该谷物34天的小麦籽粒和蛋鸡所产鸡蛋中的土壤镉和铅含量，以及30天休药期后的肝脏和肌肉中的含量。土壤镉含量（0.6至2.9 ppm）导致籽粒中镉直接呈线性积累，积累量在1.25至5.36 ppm之间。未检测到籽粒对土壤铅含量（4.0至18.7 ppm）有响应，籽粒中铅平均含量为2.7±1.5 ppm。母鸡摄入1500至11,000微克镉/千克体重，导致干蛋白中镉含量达到1.87 ppm，但在蛋黄、肝脏或肌肉中未检测到镉。摄入34天后，铅平均摄入量为13,386微克/千克体重，导致蛋黄和蛋白中铅含量分别平均为3.88和4.71微克/克，但在肝脏和肌肉中未检测到铅。土壤库中的镉有0.004%、铅有0.02%积累在籽粒中；籽粒中的镉有1.6%积累在鸡蛋中。通过摄入谷物，土壤库中只有极少量（1×10⁻⁵）的镉和铅转移并保留在母鸡组织中。
