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The growth performance, intestinal digestive and absorptive capabilities in piglets with different lengths of small intestines

  • M. Wang (a1), C. Yang (a1), Q. Y. Wang (a1), J. Z. Li (a1), Y. L. Li (a1), X. Q. Ding (a1), J. Yin (a1), H. S. Yang (a1) (a2) and Y. L. Yin (a1) (a2)...

Abstract

The small intestine is an important digestive organ and plays a vital role in the life of a pig. We tested the hypothesis that the length of the small intestine is related to growth performance and intestinal functions of piglets. A total of 60 piglets (Duroc × Landrace × Yorkshire), weaned at day 21, were fed an identical diet during a 28-day trial. At the end of the study, all piglets were sacrificed, dissected and grouped according to small intestine lengths (SILs), either short small intestine (SSI), middle small intestine (MSI) or long small intestine (LSI), respectively. Positive relationships between SIL and BW, average daily gain (ADG), average daily feed intake (ADFI) and gain-to-feed ratios (G : F) were observed. Final BW, ADG, ADFI and G : F significantly increased (P < 0.05) in MSI and LSI piglets compared with SSI piglets. Short small intestine and MSI had greater jejunal mucosa sucrase and alkaline phosphatase activities (P < 0.05) than LSI piglets. The mRNA level of solute carrier family 2 member 2 (Slc2a2) in the jejunal mucosa of SSI piglets was the greatest. The MSI piglets had a greater (P < 0.05) ileal villus height than other piglets and greater (P < 0.05) villus height-to-crypt depth ratios than LSI piglets. However, the LSI piglets had a greater (P < 0.05) ileal crypt depth than SSI piglets. No significant differences in duodenal, jejunal, caecal and colonic morphologies were detected among the groups. Moreover, luminal acetate, propionate, butyrate and total short-chain fatty acid contents were greater (P < 0.05) in SSI and MSI piglets than those in LSI piglets. In addition, there was greater serum glucose concentration in MSI piglets than other piglets. Serum albumin concentration in SSI piglets was the lowest. In conclusion, these results indicate that SIL was significantly positively associated with growth performance, and in terms of intestinal morphology and mucosal digestive enzyme activity, the piglets with a medium length of small intestine have better digestion and absorption properties.

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Corresponding author

E-mail: yhs@hunnu.edu.cn

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Keywords

The growth performance, intestinal digestive and absorptive capabilities in piglets with different lengths of small intestines

  • M. Wang (a1), C. Yang (a1), Q. Y. Wang (a1), J. Z. Li (a1), Y. L. Li (a1), X. Q. Ding (a1), J. Yin (a1), H. S. Yang (a1) (a2) and Y. L. Yin (a1) (a2)...

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