Berg L R, Nordstrom J O, Ousterhout L E
Poult Sci. 1980 Aug;59(8):1860-3. doi: 10.3382/ps.0591860.
Increasing dietary lead concentrations from 0 to 2000 ppm linearly decreased the weight of two-week-old chicks to approximately 70% of that of the controls. The growth depression caused by the lead was lessened by increasing the dietary calcium and phosphorus levels and was completely counteracted by approximately 2.1% calcium with 1.4% phosphorus. As expected, increasing calcium and phosphorus levels up to 1.2% calcium and .8% phosphorus increased bone ash. Lead had no effect on bone ash.
