Feed Science and Technology

Effects of Coated ZnO on Growth Performance, Serum Biochemical Indices and Nutrient Apparent Digestibility of Weaner Piglets

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  • 1. College of Animal Sciences and Veterinary Sciences, Shenyang Agricultural University, Shenyang 110866, China;
    2. Fujian Shenna Bio. Co., Ltd., Fuzhou 350700, China;
    3. Liaoning Debao Agricultural and Animal Husbandry Group Co., Ltd., Shenyang 110171, China

Received date: 2015-01-08

  Online published: 2015-06-17

Abstract

This trial was conducted to study the effects of coated ZnO (C-ZnO) on the growth performance, the serum biochemical indices and nutrient apparent digestibility of weaner piglets, by compared with uncoated ZnO, aimed at research the effects of C-ZnO instead of traditional ZnO, and discussed production practice to reduce the possibility of the dosage of ZnO and enhance its effect. A total of 120 Large-White weaner piglets were randomly divided into 5 groups with 4 replicates per group and 6 piglets per replicate. Piglets in control group were fed a basal diet, the four groups were fed the basal diet supplemented with 2 400 mg/kg ZnO and 1 800, 2 400, 2 740 mg/kg C-ZnO, respectively. The trial lasted for 28 days. The results showed as follows: compared with control group, the average daily gain in the group supplemented with 2 400 mg/kg C-ZnO was increased significantly (P<0.01), the ratio of feed to gain was decreased significantly (P<0.05), and the diarrhea rate was decreased significantly (P<0.01). The average daily gain of 2 400 mg/kg C-ZnO group was significantly higher than that of ZnO group (P<0.01). Compared with control group, serum contents of growth hormone (GH), immunoglobulin G (IgG), immunoglobulin M (IgM) and the digestibility of crude protein and ether extract were significantly increased in 2 400 mg/kg C-ZnO group (P<0.01). Compared with control group, a significant reduction in E. coli number (P<0.01) and a significantly increase in Bifidobacteria number were also observed in 2 400 mg/kg C-ZnO group (P<0.01). Compared with ZnO group, serum GH content was significantly increased (P<0.05) and alkline phosphatase (AKP) activity was significantly decreased (P<0.05) in 2 400 mg/kg C-ZnO group. There were no differences in the growth performance, serum indices and nutrients apparent digestibility between the 1 800 mg/kg C-ZnO and ZnO groups (P>0.05). The diarrhea rate in ZnO groups was significantly decreased (P<0.05) compared with control group, but the other growth performance had no significant difference (P>0.05). In conclusion, supplementation of 2 400 mg/kg coated ZnO in weaner piglets diet can improve the growth performance, improve the nutrient digestible situation and control the diarrhea rate. The effect of 2 400 mg/kg uncoated ZnO is similar to that of 1 800 mg/kg coated one.

Cite this article

ZHU Yujing, SU Xin, LI Fangfang, ZHANG Xin, KUANG Yinggu, ZHENG Lili, GAO Yuan, MEN Lin, GUO Fulai, ZHANG Yong . Effects of Coated ZnO on Growth Performance, Serum Biochemical Indices and Nutrient Apparent Digestibility of Weaner Piglets[J]. Chinese Journal of Animal Nutrition, 2015 , 27(6) : 1779 -1786 . DOI: 10.3969/j.issn.1006-267x.2015.06.014

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