Effects on growth and cadmium residues from feeding cadmium-added diets with and without montmorillonite nanocomposite to growing pigs.
One hundred and ninety-two crossbred pigs (barrows, Duroc x Landrace x Yorkshine, initial weight 27.6 kg) were used to evaluate the effects of montmorillonite nanocomposite (MNC) on cadmium (Cd) retention in tissues of growing pigs. The animals were randomly assigned to 2 supplementations of Cd (0 or 10 mg/kg) and 2 levels of MNC (0 or 0.5%) in a 2x2 factorial arrangement. Each group was fed corn-soybean basal diets and consisted of 3 replications of 16 pigs. The feeding experiment lasted 83 d. Pig growth performances decreased significantly by addition of 10 mg Cd/kg (p<0.05) and improved with supplementation of MNC (p<0.05). Addition of MNC with Cd decreased Cd retentions in muscle, liver, kidney, spleen, thymus and lymphaden of pigs (p<0.05). MNC also decreased tissue Cd residues of pigs fed the diet without added Cd (p>0.05). There were decreased iron levels and increased copper levels in serum and liver of 10 mg Cd/kg treatment (p<0.05). Zinc content in serum and liver was not affected by the addition of Cd (p>0.05). Serum and liver iron, copper and zinc concentrations of pigs fed MNC without added Cd were unaffected by MNC (p>0.05).
Key Laboratory for Molecular Animal Nutrition of Ministry of Education, College of Animal Science, Zhejiang University, Haujiachi Campus, Qiutao North Road 164, Hangzhou, 310029, PR China.
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Xu
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Han
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Wang
D000821:Animal Feed; D000818:Animals; D001546:Bentonite / Q000633:toxicity*; D002104:Cadmium / Q000493:pharmacokinetics / Q000633:toxicity*; D003300:Copper / Q000097:blood; D005308:Fertilizers; D007501:Iron / Q000097:blood; D008099:Liver / Q000737:chemistry; D008297:Male; D011897:Random Allocation; D013552:Swine / Q000254:growth & development*; D015032:Zinc / Q000097:blood
D005308:Fertilizers; D002104:Cadmium; D001546:Bentonite; D003300:Copper; D007501:Iron; D015032:Zinc