Dietary Optimal Supplemental Level of Manganese for Chinese Yellow-Feathered Breeder Hens during Peak Period of Laying

WANG Yibing; CHEN Fang; JIANG Shouqun; GOU Zhongyong; LI Long; LIN Xiajing; FAN Qiuli; CUI Xiaoyan

doi:10.3969/j.issn.1006-267x.2019.10.016

Chinese Journal of Animal Nutrition >

2019 , Vol. 31 >Issue 10: 4527 - 4536

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.10.016

Dietary Optimal Supplemental Level of Manganese for Chinese Yellow-Feathered Breeder Hens during Peak Period of Laying

WANG Yibing ,
CHEN Fang ,
JIANG Shouqun ,
GOU Zhongyong ,
LI Long ,
LIN Xiajing ,
FAN Qiuli ,
CUI Xiaoyan

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State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science(South China) of Ministry of Agriculture, 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: 2019-03-20

Online published: 2019-10-17

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Abstract

This experiment was conducted to investigate the effects dietary manganese supplemental level on performance, egg quality, traits related to reproduction, hatching performance, plasma hormone and biochemical indicators and gene expression in tissues of Chinese yellow-feathered breeder hens during peak period of laying, to find out the dietary optimal supplemental level of manganese for Chinese yellow-feather breeder hens during peak period of laying. Single factor experimental design was used for the experiment. Six hundred Lingnan Chinese yellow-feathered breeder hens at egg-laying peak were randomly assigned to 5 groups with 6 per replicate of 20 birds per replicate. Breeder hens in the 5 groups were fed experimental diets supplemented with 0 (control group), 45, 90, 135 and 180 mg/kg manganese based on a basal diet (containing 9.89 mg/kg manganese) for 10 weeks, respectively. The results showed as follows:compared with control group, dietary supplemented with 90 and 135 mg/kg manganese enhanced laying rate and average daily egg mass of breeder hens to a certain extent, but the difference was not significant (P>0.05). Compared with control group, dietary supplemented with 90 and 135 mg/kg manganese significantly decreased early embryo mortality (P<0.05), and dietary supplemented with 135 mg/kg manganese significantly decreased middle embryo mortality (P<0.05), and also significantly enhanced hatchability of fertilized eggs (P<0.01). As dietary manganese supplemental level increasing, the content of follicle-stimulating hormone (FSH) in plasma was enhanced, and it in manganese supplementation groups was significantly higher than that in control group (P<0.05), while the content of cholesterol in plasma was not influenced by dietary manganese supplemental level (P>0.05). The relative expression levels of manganese superoxide dismutase (MnSOD) gene in heart and follicle and B-cell lymphoma-2 (BCL-2) gene in follicle were not influenced by dietary manganese supplemental level (P>0.05), however, the relative expression level of TH gene in hypothalamus was significantly decreased compared with control group when dietary manganese supplemental level was 180 mg/kg (P<0.05). In conclusion, taking into consideration of all results, the dietary optimal supplemental levels of manganese for Chinese yellow-feather breeder hens during peak period of laying are 90 to 135 mg/kg.

Key words： manganese; Chinese yellow-feather breeder hens; performance; reproduction performance; hatching performance; plasma hormone and biochemical indicators

Cite this article

WANG Yibing , CHEN Fang , JIANG Shouqun , GOU Zhongyong , LI Long , LIN Xiajing , FAN Qiuli , CUI Xiaoyan . Dietary Optimal Supplemental Level of Manganese for Chinese Yellow-Feathered Breeder Hens during Peak Period of Laying[J]. Chinese Journal of Animal Nutrition, 2019 , 31(10) : 4527 -4536 . DOI: 10.3969/j.issn.1006-267x.2019.10.016

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