Evaluation of the Biological Safety of Selenium Yeast for Broilers

HE Wengang, ZHAO Yuzhen, LIAO Xiudong, ZHANG Liyang, LYU Lin, GUO Yanli, LUO Xugang

doi:10.3969/j.issn.1006-267x.2017.05.023

Chinese Journal of Animal Nutrition >

2017 , Vol. 29 >Issue 5: 1634 - 1644

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.05.023

Molecular Nutrition

Evaluation of the Biological Safety of Selenium Yeast for Broilers

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1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
2. Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China

Received date: 2016-11-18

Online published: 2017-05-13

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Abstract

This experiment was conducted to investigate the effects of dietary different supplemental levels of selenium yeast on growth performance, hemoglobin content and hematocrit in blood, plasma biochemical parameters, organ indices and histopathological changes of Arbor Acres (AA) broilers so as to evaluate the biological safety of selenium yeast for broiler chicks.A total of 288 one-day-old AA broilers were randomly allocated into four groups with six replicates per group and twelve broilers per replicate (half male and half female) in a completely randomized design. Broilers were fed the corn-soybean meal basal diets supplemented with 0, 0.4, 2.4 or 4.9 mg/kg selenium yeast (as selenium). The experiment lasted for 42 days. The results showed as follows: 1) compared with the control group, dietary supplemented with 0.4 and 2.4 mg/kg selenium yeast significantly increased the average daily feed intake of broilers during 22 to 42 days of age (P<0.05), dietary supplemented with 0.4, 2.4 and 4.9 mg/kg selenium yeast significantly increased the average daily gain of broilers during 1 to 42 days of age (P<0.05), but no significant differences were found in the above two indices among all the selenium yeast groups (P>0.05). 2) Except dietary different supplemental levels of selenium yeast significant affected the urea nitrogen content and glutathione peroxidase (GSH-Px) activity in plasma of broilers at 21 days of age and plasma GSH-Px activity of broilers at 42 days of age (P<0.05), but did not affect the other plasma biochemical parameters (P>0.05). Compared with the control group, the plasma GSH-Px activity of broilers at 21 and 42 days of age in selenium yeast groups was significantly increased as dietary selenium yeast level increased (P<0.05), and dietary supplemented with 2.4 mg/kg selenium yeast significantly decreased plasma urea nitrogen content of broilers at 21 days of age (P<0.05). 3) Dietary different supplemental levels of selenium yeast had no significant effects on hemoglobin content and hematocrit in blood of broilers at 21 and 42 days of age and organ indices of broilers at 42 days of age (P>0.05), and did not cause the histopathological changes of major organs. These results indicate that when dietary supplemental level of selenium yeast is 0.4 mg/kg (dietary total selenium content is 0.41 mg/kg), the supplemental level of chromium (as selenium yeast) to diet which is 10 times of the allowance will be safe for broilers.

Key words： selenium yeast; biological safety evaluation; broilers

Cite this article

HE Wengang, ZHAO Yuzhen, LIAO Xiudong, ZHANG Liyang, LYU Lin, GUO Yanli, LUO Xugang . Evaluation of the Biological Safety of Selenium Yeast for Broilers[J]. Chinese Journal of Animal Nutrition, 2017 , 29(5) : 1634 -1644 . DOI: 10.3969/j.issn.1006-267x.2017.05.023

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