Feed Science and Technology

Effects of Nano Zinc Oxide on Growth Performance and Intestinal Mucosal Barrier in Weaner Piglets

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  • 1. Institute of Feed Science, Zhejiang University, Hangzhou 310058, China;
    2. Institute of Virology and Biotechnology Research, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Received date: 2011-10-19

  Online published: 2012-02-07

Abstract

This experiment was conducted to study the effects of nano zinc oxide on growth performance and intestinal mucosal barrier in weaner piglets. Ninety-six 'Duroc × Landrace × Yorkshire’ crossbred piglets with an average body weight of (5.7±0.2) kg were weaned at 21 days of age and randomly allocated into control group, zinc oxide group and nano zinc oxide group (4 replicates in each group and 8 piglets per replicate). A basal diet was the diet of control group, a basal diet supplemented with 3 000 mg/kg zinc as zinc oxide was the diet of zinc oxide group, and a basal diet supplemented with 300 mg/kg zinc as nano zinc oxide was the diet of nano zinc oxide group, respectively. Feeding trial lasted for 14 days. The results showed that the diet of nano zinc oxide group improved average daily gain (P<0.05) and decreased diarrhea rate of piglets (P<0.05) compared with the diet of control group. There was no significant difference in growth performance and diarrhea rate between the piglets of nano zinc oxide group and the piglets of zinc oxide group (P>0.05). The piglets of nano zinc oxide group had higher villus height and villus height/crypt depth (P<0.05), lower plasma D-lactate content and diamine oxidase activity (P<0.05) compared with the piglets of control group. No significant difference in intestinal mucosal barrier was found between the piglets of nano zinc oxide group and the piglets of zinc oxide group (P>0.05). The results indicate that the diet supplemented with 300 mg/kg zinc as nano zinc oxide can protect intestinal mucosal barrier, decrease diarrhea rate and improve growth performance, which is comparable to the effect of the diet supplemented with 3 000 mg/kg zinc as zinc oxide.

Cite this article

HU Caihong, YOU Zhaotong, ZHU Kang, LUAN Zhaoshuang . Effects of Nano Zinc Oxide on Growth Performance and Intestinal Mucosal Barrier in Weaner Piglets[J]. Chinese Journal of Animal Nutrition, 2012 , 24(2) : 285 -290 . DOI: 10.3969/j.issn.1006-267x.2012.02.014

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