Effect of humic acids on lead accumulation in chicken organs and muscles
2008
Zraly, Z.,Vyzkumny Ustav Veterinarniho Lekarstvi, Brno (Czech Republic) | Pisarikova, B.,Vyzkumny Ustav Veterinarniho Lekarstvi, Brno (Czech Republic) | Trckova, M.,Vyzkumny Ustav Veterinarniho Lekarstvi, Brno (Czech Republic) | Navratilova, M.,Vyzkumny Ustav Veterinarniho Lekarstvi, Brno (Czech Republic)
The purpose of the present study was to investigate the effect of feeding humic acid (HA) to pullets during 10 days on the concentrations of HA in different organs and muscles. Forty pullets allocated to 4 groups with ten birds in each were used. The control group (K) was fed the basic diet without supplementation. The second group (HA) was fed the basic diet with HA at the dose of 500 mg/chicken/day. The first experimental group (Pb) was fed basic diet containing lead acetate at the dose of 3.54 mg (1.42 mg Pb) per pullet/day and the second experimental group (Pb + HA) was fed lead acetate and 500 mg HA/day. The Pb content was determined in liver, kidney, bone and muscle tissues. Pb concentrations in the tissues of control animals were 4% (liver), 12.6% (kidneys) and 10% (muscles) of the maximum residue limits. Significantly increased Pb concentrations were detected in liver, kidneys, bones and muscles of Pb chickens. The highest accumulation was found in bones. Concurrent administration of HA and Pb caused a significant decrease in the Pb conc., i.e. by 30%, 43.8 %, 53.8 % and 50.6% in liver, kidneys, muscles and bones, respectively, in comparison with Pb chickens. A significant decrease in Cu concentration was observed in blood plasma of both experimental groups.
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