The Effect of Rare Earth Elements on Growth Performance, Tibia Mineralization and Blood Serum of Japanese Quails.

The present study was designed to determine the effect of different
types and concentrations rare earth elements on growth performance
of Japanese quails. 120 and 225 one day old Japanese quails in the
first and third experiment respectively were allotted to five
dietary treatments: a control group and four REE groups which were
supplemented with 50,100, 400 and 800 mg/kg of REE-citrate, a
Lanthanoid mixture. In the second experiment 300 one day old
Japanese quails were allotted to eight dietary treatments: a
control group and seven REE groups which were supplemented with 50
or 100 mg/kg of REE-citrate (type A), lanthanum acetate (type B),
lanthanum chloride (type C) and lanthanum carbonate (type D). Each
experiment lasted four weeks and during it feed and water was ad
libitum. The REE supplements increased the weight gain of Japanese
quails compare to control group by 18.5-22% during the first
experiment (p