Effects of conditioners (single-layer, double-layer and retention-conditioner) on the growth performance, meat quality and intestinal morphology of growing and finishing pigs

doi:10.1016/S2095-3119(17)61782-9

Journal of Integrative Agriculture

2018, Vol. 17

Issue (04): 919-927 DOI: 10.1016/S2095-3119(17)61782-9

Animal Science · Veterinary Medicine

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Effects of conditioners (single-layer, double-layer and retention-conditioner) on the growth performance, meat quality and intestinal morphology of growing and finishing pigs

DUAN Hai-tao^{1, 3}, LI Jun-guo^{1, 2}, XUE Min¹, YANG Jie¹, DONG Ying-chao¹, LIANG Ke-hong³, QIN Yu-chang³

¹ Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 10081, P.R.China
² Key Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing 10081, P.R.China
³ Institute of Food and Nutrition Development, Ministry of Agriculture, Beijing 10081, P.R.China

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Abstract This experiment was conducted to investigate the effects of feed conditioners (single-layer, double-layer and retention-conditioner) on the growth performance, meat quality and intestinal morphology of pigs throughout the growing to finishing phase. A total of 96 growing pigs ((28.70±3.20) kg) were selected and randomized into three treatment groups with four replicates per group. Eight pigs were used per replicate for the 17-week feeding trial. The grower diet was given at 0 to 6 weeks and a finisher diet was given at 6 to 17 weeks. The treatments were as follows: SC diet (control; single-layer conditioning), DC diet (double-layer conditioning), and RC diet (retention-conditioning). Starch gelatinization was significantly higher (P<0.05) in the RC treatment than in the SC treatment, however, there was no significant difference in the starch gelatinization between the DC group and the RC group. In the growing phase, the feed to gain index (F:G) was significantly lower (P<0.05) in the RC group than in the SC and DC groups. Between growing and finishing, the F:G was the lowest (P<0.05) in the SC group compared to the RC or DC group. Drip loss, a measurement of meat quality, was significantly lower (P<0.05) in longissimus dorsi tissue collected from pigs fed the RC diet than in tissues collected from pigs fed the SC diet. The intestinal quality of the duodenum and jejunum tissues showed a significant increase (P<0.05) in the crypt depth and villus height in the RC group compared to the SC- or DC-treated pigs. These results demonstrated that the retention-conditioner treatment decreased the F:G in growing pigs, improved intestinal morphology and enhanced the meat quality in the finishing pigs. However, the retention-conditioner treatment had a negative impact on growth performance in the finishing pigs.

Keywords: pigs conditioner feed quality meat quality intestinal morphology

Received: 18 May 2017 Accepted:

Fund:

This work was financially supported by the National Key Research and Development Program of China (2016YFF0201800), the National Natural Science Foundation of China (31572631, 31372539), the Beijing Technology System for Sturgeon and Salmonids, China (SCGWZJ 20171103-1), the National Basic Research Program of China (2014CB138600), the Fundamental Research Funds of China (1610382016010), and the Special Scientific Research Fund of Agriculture Public Welfare Profession of China (201203015).

Corresponding Authors: Correspondence QIN Yu-chang, Tel: +86-10-82106058, Fax: +86-10-82106069, E-mail: qinyuchang@caas.cn; LI Jun-guo, Tel: +86-10-82106058, Fax: +86-10-82106069, E-mail: lijunguo@caas.cn

About author: DUAN Hai-tao, E-mail: woshiduanhaitao@126.com;

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DUAN Hai-tao, LI Jun-guo, XUE Min, YANG Jie, DONG Ying-chao, LIANG Ke-hong, QIN Yu-chang . 2018. Effects of conditioners (single-layer, double-layer and retention-conditioner) on the growth performance, meat quality and intestinal morphology of growing and finishing pigs. Journal of Integrative Agriculture, 17(04): 919-927.

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