Effects of Yeast Culture Using Distiller&rsquo;s Grains on Growth Performance, Serum Antioxidant Indices and Intestinal Morphology of Broilers

ZHOU Jianmin, MA Youbiao, ZHANG Haijun, WANG Jing, WU Shugeng, QI Guanghai, LIU Jianzhong, LYU Liang

doi:10.3969/j.issn.1006-267x.2019.05.043

2019 , Vol. 31 >Issue 5: 2357 - 2366

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.05.043

Molecular Nutrition

Effects of Yeast Culture Using Distiller’s Grains on Growth Performance, Serum Antioxidant Indices and Intestinal Morphology of Broilers

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1. Key Laboratory of Feed Biotechnology of Ministry of Agriculture, Feed Research Institute, The Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. LOAD Biological Environmental Technology(Gulin) Co., Ltd., Luzhou 646509, China

Received date: 2018-10-24

Online published: 2019-05-15

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Abstract

The experiment was to investigate the effects of yeast culture using distiller's grains (DGYC) on growth performance, serum antioxidant indices and intestinal morphology of broilers. A total of 525 one-day-old Arbor Acres (AA) male broilers were randomly allotted into 5 groups with 7 replicates of 15 birds each. The chicks in the control group were fed a basal diet, and those in experimental groups were fed the basal diet supplemented with 0.25%, 0.50%, 1.00% and 2.00% DGYC, respectively. The trial lasted for 42 days. The results showed as follows: 1) compared with the control group, dietary 1.00% DGYC increased the average daily gain of broilers during later growth period (22 to 42 days of age) (0.05≤P<0.10), significantly decreased the ratio of feed to gain of broilers (P<0.05), and dietary DGYC had a quadratic effect on both above indices (P<0.05). 2) Compared with the control group, dietary 0.25% DGYC significantly decreased the abdominal fat rate of broilers at 21 days of age (P<0.05), and significantly increased the leg muscle rate of broilers at 42 days of age (P<0.05); dietary 0.50% and 1.00% DGYC tended to decreased the drip loss in breast muscle of broilers at 42 days of age (0.05≤P<0.10). 3) Dietary DGYC linearly improved the activities of glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD) and the total antioxidant capacity (T-AOC) in serum of broilers at both 21 and 42 days of age (P<0.05), and had a quadratic effect on the serum GSH-Px activity of broilers at 21 days of age and the SOD activity and T-AOC in serum of broilers at 42 days of age (P<0.05). Compared with the control group, dietary 1.00% DGYC significantly increased the serum GSH-Px activity of broilers at 21 days of age (P<0.05); dietary 0.50%, 1.00% and 2.00% DGYC significantly increased the serum SOD activity of broilers at 21 days of age (P<0.05), and significantly increased the serum T-AOC of broilers at both 21 and 42 days of age (P<0.05); dietary 0.50% and 1.00% DGYC significantly increased the serum SOD activity of broilers at 42 days of age (P<0.05). 4) The villus height at 21 days of age and the villus height to crypt depth ratio at 42 days of age in jejunum of broilers in 1.00% DGYC supplementation group were significantly higher than those in the control group (P<0.05), and all of them increased quadratically with DGYC supplemental level increasing (P<0.05). 5) Dietary DGYC caused quadratic effects on growth performance, serum antioxidant indices and jejunum morphology of broilers. The predicted optimal DGYC supplemental level for the best jejunum morphology was 0.9% to 1.1%, and for the best growth performance and serum antioxidant capacity was 1.1% to 1.2%. These results indicate that dietary DGYC can increase serum antioxidant capacity, improve morphology of jejunal mucosa, and enhance the growth performance of broilers. Based on the growth performance, serum antioxidant indices and intestinal mucosal morphology of broilers, the DGYC supplemental level in the basal diet for broilers is recommended to be 0.9% to 1.2%.

Key words： yeast culture using distiller's grains; growth performance; antioxidant indices; intestinal morphology

Cite this article

ZHOU Jianmin, MA Youbiao, ZHANG Haijun, WANG Jing, WU Shugeng, QI Guanghai, LIU Jianzhong, LYU Liang . Effects of Yeast Culture Using Distiller’s Grains on Growth Performance, Serum Antioxidant Indices and Intestinal Morphology of Broilers[J]. Chinese Journal of Animal Nutrition, 2019 , 31(5) : 2357 -2366 . DOI: 10.3969/j.issn.1006-267x.2019.05.043

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