Toxikus fémek (Cd, Pb, Hg és Ni) vizsgálata házinyúlban és brojlercsirkében

Nowadays there is an increasing concern in relation to human consumption of potentially toxic metal-contaminated animal products, namely, that normal cuts of meat, excluding liver and kidney. Therefore a series of trials were designed to evaluate tissue and organ of economical importance animal species, such as rabbit, responses to trace element (Cd, Pb, and Hg) levels that could actually exist in the feedstuffs in a farm. The daily rations included carrot, potato, or beetroot. The effects of toxic metal burden on growth, the digestibility, the changes of haematological and biochemical values as well as of pathophysiological processes were detected. Furthermore, for the investigation of the possible adverse effects of Ni burden, both a broiler chicken and rabbit model experiment were planned. The carrot samples contained in DM 2.30 mg/kg Cd, 4.01 mg/kg Pb, and 30.00 mg/kg Hg, while the potato samples contained in DM 2.12 mg/kg Cd, 4.1 mg/kg Pb, and 3.44 mg/kg Hg and the beetroot samples contained in DM 4.72 mg/kg Cd, 3.03 mg/kg Pb, and 6.75 mg/kg Hg. Both the grower diet for broilers and the commercial pellet for rabbit were supplemented with 0, 50 or 500 mg/kg Ni. The results of this study suggest that the adverse effect exerted by high concentrations of Cd, Pb and Hg can hardly be monitored by determining the classical zootechnical parameters (i.e. feed intake, body weight gain). The smaller body weight of rabbits fed carrot, potato or beetroot samples is probably due to the reduced dry matter and, consequently, the lower energy intake from these feedstuffs. Supplemental 500 mg/kg of Ni to the diet significantly (P