Application of some methods for reducing levels of heavy metals in fattening Egyptian buffalo bulls

Abstract: The present study was carried out to evaluate the effects of lead and cadmium found in the environment on the performance of buffalo calves fed rations treated with yeast, zinc and EDTA. Twenty animals from Mehalet-Mousa farm were used, five animals for each treatment. Treatments included: the control in which animals were fed a non-treated ration and three treatments, in which animal were fed rations supplemented with yeast, zinc or EDTA. Hematological and biochemical measurements were obtained for all animals in each treatment. The measurements of lead and cadmium residues in each of water, ration, blood, liver, kidney and eye muscles were obtained for three animals in each treatment Levels were than the significantly higher. The concentrations of lead and cadmium were 1.22 and 0.22 ppm in water and were 0.73 and 0.5ppm in ration, respectively. These normal levels of 0.05 and 0.001 ppm for lead and cadmium, respectively. The results significantly showed higher concentration of hemoglobin in the animals treated with yeast, zinc and EDTA, being 14.82, 16.18 and 17.41 g/dl respectively, compared with 12.43g/dl for than the control treatment. The PCV concentration was significantly higher in EDTA treatment (37.39 g/dl) compared to 35.64, 35.80 and 34.40 g/dl for the yeast, zinc and control treatments, respectively. All treatments showed significant reduction in creatinine concentration than the control treatment. Residues of lead and cadmium in blood plasma were less in yeast, zinc and EDTA treatments compared to the control treatment. Yeast, zinc and EDTA treatments resulted significantly in lower levels of lead (0.27, 0.25 and 0.24 ppm) compared to 0.54 ppm in the control treatment. While significant differences were recorded in the residues cadmium being 0.05, 0.04 and 0.04 ppm in yeast, zinc and EDTA treatments compared to 0.09ppm for the control treatment. The levels of lead in liver significantly differed among different treatments and ranged between 0.72 to 0.16 ppm in all treatments. While the levels of lead in kidney were significantly higher in yeast, zinc and EDTA compared to the control treatment, being 0.28, 0.11, 0.08 and 0.92 ppm respectively. The levels of lead in eye muscles significantly differ among different treatments being 0.15, 0.12, 0.07 and 0.05 ppm for yeast, zinc, EDTA and control treatments respectively. The levels of cadmium in liver were significantly differed among different treatments, being the highest (0.52 ppm) in the control treatment and the lowest (0.20 ppm) in the EDTA treatment. In kidney, cadmium level was the highest in the control treatment (0.41 ppm) and the lowest (0.27ppm) in the EDTA treatment. In eye muscles, cadmium level ranged between 0.04 to 0.02 ppm in all treatments. The initial body weight was 195±5 kg for all treatments. Average daily gain was higher in the yeast treatment (0.46 kg) compared with those zinc, EDTA and control treatments (0.41, 0.41 and 0.43 kg, respectively). It is concluded that treating rations with, yeast, zinc or EDTA can reduce in growth .Moreover, animals fed EDTA ration showed the lowest residues compared, to the animals fed yeast and zinc ration.
Key words: Lead, cadmium, yeast, zinc, EDTA, blood, meat, rations, kidney, liver.
Publication year 2011
Pages PP. 99
Availability location مكتبة معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى - الجيزة
Availability number 1182
Organization Name
Country Egypt
Author(s) from ARC
Agris Categories Animal physiology - Nutrition
Blood. Cadmium. Chelating agents. Kidneys. Lead. Liver. Meat. Rations. Yeasts. Zinc.
Proposed Agrovoc buffalo calves;
Publication Type PhD Thesis