INFLUENCE OF RARE-EARTH VITAMIN-C COMPOUND ON THE GROWTH OF LIVESTOCKAND POULTRY

The formula of synthesized rare earth-vitamin C (RE-Vc) compound is RE (OH)(C6H7O6)(2) . 2H(2)O. It is a yellowish-brown powder and soluble i n water. Adding it to feed for livestock, poultry and aquaculture will promote their growth. The weight growth was raised by 5-15%, the coef ficient of feed utilized increased by 5-12% and the survival rate incr eased by about 5%. The LD(50) value of RE-Vc compound for rats and chi cken is more than 15 000 mg kg(-1). The accumulated coefficient for ra ts is more than five, regarded as slight accumulation. The level of RE residual for the tested pig, chicken and fish fed with RE-Vc compound shows no obvious differences compared with the untreated animals. RE was accumulated mainly in the viscera such as bone, liver, stomach, sp leen. No residual was found in the edible meat.