Effect of Chromium Nanoparticle on Growth Performance, Carcass Characteristics, Pork Quality and Tissue Chromium in Finishing Pigs

  • Wang, M.Q. (Zhejiang University, Feed Science Institute Ministry of Education) ;
  • Xu, Z.R. (The Key Laboratory of Molecular Animal Nutrition Ministry of Education)
  • Received : 2003.11.17
  • Accepted : 2004.04.16
  • Published : 2004.08.01


The study was conducted to evaluate the effect of chromium nanoparticle (CrNano) on growth, carcass characteristics, pork quality, and tissue chromium in finishing pigs. A total of 100 Duroc$\times$Landrace$\times$Yorkshire barrows (average initial BW of 64.78$\pm$0.83 kg) were divided into 10 pens, 10 pigs per pen. 5 pens of pigs were fed with control diet (corn-soybean meal, 1.05% Lys) and others were fed with control diet addition with 200 $\mu$g/kg Chrome (Cr) from CrNano. During the trial, all pigs were given free access to feed and water. After 35 days trial, 10 pigs from each each treatment (weight similar to average group weight, 91.34$\pm$1.31 kg for control group, and 92.26$\times$0.56 kg for CrNano treated group) were sacrificed to measure carcass characteristics, pork quality, and to collect the samples of longissimus muscle, liver, kidney and heart. The results indicated that the addition of 200 $\mu$g/kg CrNano decreased feed: gain ratio by 3.56% (p<0.05) compared to the control group. Pigs fed CrNano had 14.06% higher (p<0.05) carcass lean percentage, 19.96% (p<0.05) larger longissimus muscle area and 25.53% lower (p<0.05) carcass fat percentage, 18.22% lower (p<0.05) backfat thickness. Drip loss in chops from pigs fed CrNano was decreased by 21.48% (p<0.05) and weights of longissimus muscle and semimembranosus were increased by 16.33% (p<0.05) and 14.87% (p<0.05) respectively. In addition, supplemental CrNano resulted in 184.11% (p<0.05), 144.99% (p<0.05), 88.13% (p<0.05) and 52.60% (p<0.05) increment of Cr concentration in longissimus muscle, liver, kidney and heart, respectively. These results suggest that supplemental CrNano has beneficial effects on carcass characteristics, pork quality and individual skeletal muscle weight, increase tissue chromium concentration in selected muscle and organs.


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