Molecular Nutrition

Effects of Bacillus subtilis on Growth Performance, Slaughter Performance, Serum Antioxidant Indexes and Intestinal Morphology of Shimen Chickens

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  • 1. College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China;
    2. Hunan Co-Innovation Center of Animal Production Safety, Changsha 410128, China;
    3. Hunan Engineering Research Center of Poultry Production Safety, Changsha 410128, China;
    4. Asahi Calpis Wellness Co., Ltd., Tokyo 1500022, Japan;
    5. Shanghai Naseco Products Company, Shanghai 201199, China

Received date: 2018-10-12

  Online published: 2019-05-15

Abstract

The purpose of this study was to investigate the effects of dietary Bacillus subtilis (BS) on growth performance, slaughter performance, serum antioxidant indexes and intestinal morphology of Shimen chickens. A total of 540 55-day-old healthy Shimen female chickens with similar body weight of (0.75±0.02) kg were randomly divided into 3 groups with 6 replicates per group and 30 chickens per replicate. Chickens in control group were fed a basal diet, and the others in experimental groups were fed the basal diet supplemented with 300 and 600 mg/kg BS, respectively. The adjustment period lasted for 7 days, and the experimental period lasted for 28 days. The results showed as follows: 1) compared with control group, average daily feed intake (ADFI) and average daily gain (ADG) of Shimen chickens in 300 and 600 mg/kg BS groups had an increasing trend from 1 to 14 days (P>0.05). There were no significant differences in ADFI, ADG and the ratio of feed to gain (F/G) among all groups from 15 to 28 days and 1 to 28 days (P>0.05). 2) Compared with control group, dressing percentage of Shimen chickens in 600 mg/kg BS group was significantly increased (P<0.05), and abdominal fat percentage in 300 and 600 mg/kg BS groups had an increasing trend (P>0.05). There were no significant differences in semi-eviscerated percentage, eviscerated percentage, breast muscle percentage and leg muscle percentage among all groups (P>0.05). 3) Compared with control group, the activity of total superoxide dismutase (T-SOD) in serum of Shimen chickens in 300 mg/kg BS group was significantly increased at 14 days (P<0.05), and the activity of glutathione peroxidase (GSH-Px) in serum in 300 and 600 mg/kg BS groups was significantly increased at 14 and 28 days (P<0.01). 4) Compared with control group, villus height, fluff width and crypt depth of duodenum of Shimen chickens in 300 and 600 mg/kg BS groups had an increasing trend (P>0.05), and fluff width of jejunum in 300 mg/kg BS group was significantly increased (P<0.05). There were no significant differences in fluff width, crypt depth and the ratio of villus height to crypt depth of ileum among all groups (P>0.05). In conclusion, dietary BS improves slaughter performance, enhances antioxidant capacity and improves intestinal morphology of Shimen chickens.

Cite this article

PENG Yudong, KANG Kelang, QU Xiangyong, HE Changqing, CHEN Jifa, PENG Canyang, YASUHIRO Sakai, ZHOU Xuebin . Effects of Bacillus subtilis on Growth Performance, Slaughter Performance, Serum Antioxidant Indexes and Intestinal Morphology of Shimen Chickens[J]. Chinese Journal of Animal Nutrition, 2019 , 31(5) : 2119 -2126 . DOI: 10.3969/j.issn.1006-267x.2019.05.018

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