Ruminant Nutrition

Effects of Dietary Structural Carbohydrate to Nonstructural Carbohydrate Ratio on Growth Performance and Intestinal Mucosa Immunity of Meat Rabbits

  • CHEN Jie ,
  • ZHOU Qinfei ,
  • ZHOU Shujun ,
  • ZHANG Jing ,
  • WANG Yongcai
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  • 1. Animal Science Department of Southwest University Rongchang Campus, Rongchang 402460, China;
    2. The Animal Husbandry Technology Promotion Station in Liangping Chongqing, Chongqing 405200, China

Received date: 2014-06-16

  Online published: 2014-12-05

Abstract

The present study aimed to investigate the effects of dietary structural carbohydrate to nonstructural carbohydrate ratio (SC/NSC) on growth performance and intestinal mucosa immunity of meat rabbits. A total of 180 healthy New Zealand weaning pups with similar body weight were randomly divided into 5 groups with 36 replicates per group and 1 rabbit per replicate. Rabbits in the 5 groups were fed the experimental diets with different SC/NSC (22:38, 25:35, 28:32, 31:29 and 34:26). The experiment lasted for 29 days. The results showed as follows: 1) with dietary SC/NSC increasing, the average daily feed intake was increasing, the average daily gain was firstly increased and then decreased, and the ratio of feed to gain was firstly decreased and then increased. 2) The diarrhea rate, mortality, health risk index and the average diarrheal time were decreased with dietary SC/NSC increasing (P>0.05). 3) With dietary SC/NSC increasing, the contents of interleukin 2 (IL-2) and secreted immunoglobulin A (SIgA) in the small intestinal mucosa were increased, but the contents of interleukin 6 (IL-6) and tumor necrosis factor α (TNF-α)in the small intestinal mucosa were firstly decreased and then increased. It is concluded that dietary SC/NSC can influence the intestinal mucosa IL-2 content, stimulate the secretion of SIgA and improve intestinal immune function. From the viewpoint of reduction of diarrhea rate and mortality, the best dietary SC/NSC is 34:26.

Cite this article

CHEN Jie , ZHOU Qinfei , ZHOU Shujun , ZHANG Jing , WANG Yongcai . Effects of Dietary Structural Carbohydrate to Nonstructural Carbohydrate Ratio on Growth Performance and Intestinal Mucosa Immunity of Meat Rabbits[J]. Chinese Journal of Animal Nutrition, 2014 , 26(12) : 3682 -3688 . DOI: 10.3969/j.issn.1006-267x.2014.12.018

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