Optimal Dietary Selenium Allowance for Lingnan Yellow-Feathered Broilers Aged from 1 to 21 Days

LI Long, JIANG Shouqun, ZHENG Chuntian, GOU Zhongyong, CHEN Fang, XIONG Yunxia, QIU Yueqin, XIE Xiuzhen

doi:10.3969/j.issn.1006-267x.2017.04.008

Chinese Journal of Animal Nutrition >

2017 , Vol. 29 >Issue 4: 1141 - 1147

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.04.008

Molecular Nutrition

Optimal Dietary Selenium Allowance for Lingnan Yellow-Feathered Broilers Aged from 1 to 21 Days

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The Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China

Received date: 2016-09-25

Online published: 2017-04-14

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Abstract

This experiment was conducted to investigate the effects of dietary different selenium levels on growth performance and antioxidant property of Lingnan yellow-feathered broilers aged from 1 to 21 days, in order to estimate the optimal dietary selenium allowance of fast-growing Lingnan yellow-feathered broilers in the early feeding period. One thousand and two hundred 1-day-old healthy, well-developmental, fast-growing Lingnan yellow-feathered male broilers were randomly assigned to five groups with six replicates per group and forty broilers per replicate according to the body weight. The broilers in experimental group 1 (control group) were fed the basal diet (the level of selenium was 0.039 mg/kg), and those in experimental groups 2 to 5 were fed the basal diet supplemented with 0.075, 0.150, 0.225 and 0.300 mg/kg selenium, respectively. The experiment lasted for 21 days. The results showed as follows:under the experiment condition, 1) compared with the control group, the diet supplemented with 0.300 mg/kg selenium significantly decreased the final weight and increased the ratio of feed to gain of Lingnan yellow-feathered broilers aged from 1 to 21 days (P<0.05), and the average daily gain (ADG) in 0.300 mg/kg selenium supplemental group was significantly lower than that in the other selenium supplemental groups (P<0.05). 2) Compared with the control group, the diet supplemented with 0.075 and 0.150 mg/kg selenium significantly increased the activity of glutathione peroxidase (GSH-Px) in plasma of Lingnan yellow-feathered broilers at 21 days of age (P<0.05), and the diet supplemented with 0.225 and 0.300 mg/kg selenium significantly decreased the content of malondialdehyde (MDA) in plasma (P<0.05).The activity of GSH-Px in erythrocyte in all selenium supplemental groups was significantly higher than that in the control group (P<0.05). 3) Compared with the control group, the diet supplemented with 0.075, 0.150 and 0.225 mg/kg selenium significantly increased the activity of GSH-Px in liver of Lingnan yellow-feathered broilers at 21 days of age (P<0.05), and the content of MDA in liver in 0.075 and 0.150 mg/kg selenium supplemental groups was significantly lower than that in the control group and 0.300 mg/kg selenium supplemental group (P<0.05). In conclusion, based on the growth performance and antioxidant property, the optimal dietary selenium supplemental level of Lingnan yellow-feathered broilers aged from 1 to 21 days is 0.075 mg/kg, base of 0.039 mg/kg of selenium level in the basal diet, the optimal dietary selenium allowance of Lingnan yellow-feathered broilers aged from 1 to 21 days is 0.114 mg/kg. Based on the content of MDA in liver, the optimal dietary selenium allowance of Lingnan yellow-feathered broilers aged from 1 to 21 days estimated by nonlinear regression analysis is 0.130 mg/kg.

Key words： Lingnan yellow-feathered broilers; selenium; allowance; growth performance; antioxidant property

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LI Long, JIANG Shouqun, ZHENG Chuntian, GOU Zhongyong, CHEN Fang, XIONG Yunxia, QIU Yueqin, XIE Xiuzhen . Optimal Dietary Selenium Allowance for Lingnan Yellow-Feathered Broilers Aged from 1 to 21 Days[J]. Chinese Journal of Animal Nutrition, 2017 , 29(4) : 1141 -1147 . DOI: 10.3969/j.issn.1006-267x.2017.04.008

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