Effects of Porous Zinc Oxide on Fecal Microelement Contents, Short Chain Fatty Acid Contents in Cecum Content and Feces and Intestinal Bacterial Diversity of Weaned Piglets

PENG Peng, CHEN Sijia, JIANG Zaihui, TANG Xiaopeng, LI Chengliang, DENG Dun, LUO Jie, WANG Yueli, YIN Yulong, FANG Rejun

doi:10.3969/j.issn.1006-267x.2018.12.051

2018 , Vol. 30 >Issue 12: 5221 - 5229

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.12.051

Molecular Nutrition

Effects of Porous Zinc Oxide on Fecal Microelement Contents, Short Chain Fatty Acid Contents in Cecum Content and Feces and Intestinal Bacterial Diversity of Weaned Piglets

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1. College of Animal Science and Technology, Hunan Agriculture University, Changsha 410128, China;
2. Academician Workstation of Tangrenshen Group, Zhuzhou 412002, China;
3. Key Laboratory for Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China

Received date: 2018-05-28

Online published: 2018-12-19

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Abstract

This experiment aimed to investigate the effects of diet supplemented with porous zinc oxide (P-ZnO) on fecal microelement contents, short chain fatty acid (SCFA) contents in cecum content and feces and intestinal bacterial diversity of weaned piglets. A total of 192 piglets weaned at 21 d with the body weight of (6.32±0.24) kg were allocated into 4 groups with 6 replicates and 8 piglets (half male and half female) per replicate. The piglets in group A (positive control group) were fed a basal diet supplemented with 3 000 mg/kg common zinc oxide, the piglets in group B (negative control group) were fed the basal diet, and the piglets in groups C and D were fed the basal diet supplemented with 750 and 1 500 mg/kg P-ZnO, respectively. The experiment lasted for 14 days. The results showed as follows: 1) compared with the group A, zinc content in feces of groups B, C and D was significantly decreased (P<0.05). Manganese content in feces of group C was significantly higher than that of groups A and D (P<0.05), but had no significant difference compared with group B (P>0.05). 2) Compared with group B, acetic acid content in cecum content of groups A, C and D was increased by 33.58%, 44.74% and 39.79% (P<0.05), respectively, and propionic acid content in cecum content of groups C and D was significantly increased (P<0.05). Compared with group A, each SCFA content in cecum content of groups C and D had no significant change (P>0.05). No significant difference in each SCFA content in feces among groups (P>0.05). 3) Compared with group A, operational taxonomic units (OTUs) of groups B, C and D raised substantially, Chao1 and ACE indices raised gradually (P>0.05), and Simpson index had higher tendency (P=0.095 9). Seen from the bacterial distribution at phylum level, the relative abundance of Firmicutes was increased, while the relative abundances of Proteobacteria and Actinobacteria were decreased. Seen from the bacterial distribution at genus level, compared with group B, the relative abundance of Streptococcus was increased and the relative abundance of Lactobacillus was decreased of groups A and D, and the relative abundance of Rothia of groups A and C was increased. In conclusion, the diet of weaned piglet supplemented with porous zinc oxide can increase SCFA contents in cecum content and intestinal bacterial diversity and improve intestinal microenvironment. Compares with zinc oxide, common porous zinc oxide also can decrease fecal zinc emission to save zinc resources and reduce environment pollution.

Key words： porous zinc oxide; microelement; short chain fatty acids; intestinal flora; weaned piglets

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PENG Peng, CHEN Sijia, JIANG Zaihui, TANG Xiaopeng, LI Chengliang, DENG Dun, LUO Jie, WANG Yueli, YIN Yulong, FANG Rejun . Effects of Porous Zinc Oxide on Fecal Microelement Contents, Short Chain Fatty Acid Contents in Cecum Content and Feces and Intestinal Bacterial Diversity of Weaned Piglets[J]. Chinese Journal of Animal Nutrition, 2018 , 30(12) : 5221 -5229 . DOI: 10.3969/j.issn.1006-267x.2018.12.051

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