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Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2004;17(10): 1434-1437.
DOI: https://doi.org/10.5713/ajas.2004.1434    Published online January 1, 2004.
Effects of Montmorillonite Nanocomposite on Mercury Residues in Growing/Finishing Pigs
Xianglin Lin, Zirong Xu, Xiaoting Zou, Feng Wang, Xianghua Yan, Junfang Jiang
The study was conducted to evaluate the effects of montmorillonite nanocomposite (MNC) on mercury residues in growing/finishing pigs. A total of 96 cross bred pigs (Duroc Landrace large white, 48 barrows and gilts respectively), with similar initial weight (27.87 1.15 kg), were used in this study. The animals were randomly assigned to two concentrations of mercury (0.1 and 0.3 ppm from HgCl2) and two levels (0 and 0.3%) of MNC in a 2 2 factorial arrangement of treatments. Each group has 3 pens (replications), and each pen has 8 pigs (4 barrows and 4 gilts). The experiment lasted for 90 days. The results showed that pig growth performances were not affected significantly by inclusion of Hg and addition of MNC (p 0.05). It indicated that the extent of intoxication in these pigs were not severe enough to impair growth performances. Both on the bases of 0.1 ppm and 0.3 ppm mercury supplementations, addition of 0.3% MNC markedly decreased mercury levels of blood, muscle, kidney and liver tissue (p<0.05). These results implied that the addition of non-nutritive sorptive material, MNC, could effectively reduce the gastrointestinal absorption of mercury via its specific adsorption, with a consequent reduction of mercury residues in body tissues. MNC had offered an encouraging solution to produce safe animal products with mercury contaminated feed.
Keywords: Montmorillonite Nanocomposite; Mercury; Adsorption; Residue; Pig

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