Effects of Dietary Zinc Sulfate on Egg Production Performance of Jinghong Laying Hens

ZHENG Aijuan, BAI Jie, CAI Huiyi, CHEN Zhimin, CHANG Wenhuan, DENG Xuejuan, LIU Guohua

doi:10.3969/j.issn.1006-267x.2018.06.013

Chinese Journal of Animal Nutrition >

2018 , Vol. 30 >Issue 6: 2109 - 2117

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.06.013

Molecular Nutrition

Effects of Dietary Zinc Sulfate on Egg Production Performance of Jinghong Laying Hens

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1. The Key Laboratory of Feed Biotechnology of Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. National Engineering Research Center for Biological Feed Development, Beijing 100081, China

Received date: 2017-11-22

Online published: 2018-06-20

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Abstract

The present study evaluated the effects of different supplemental levels of zinc sulfate in basal diet on egg production performance and the metallothionein content in tissues of Jinghong laying hens during peak egg production period. Five hundred and forty 20-week-old healthy Jinghong laying hens were randomly allotted to six groups with 6 replicates per group and 15 hens per replicate. Hens in the control group were fed a basal diet contained 25 mg/kg zinc, and in the experimental groups were fed diets supplemented with 25, 50, 75, 100 and 125 zinc sulfate (calculated by zinc) in the basal diet, respectively. The trial lasted for 24 weeks after 2 weeks of pre-feeding. The results showed as follows:1) different supplemental levels of zinc sulfate in the basal diet did not significantly affect the laying rate, average daily feed consumption, average egg weight, ratio of feed to egg and mortality of hens during the whole experiment period (P>0.05). 2) Different supplemental levels of zinc sulfate in the basal diet significantly increased the metallothionein content in breast muscle (P<0.05), but had no significant effects on the metallothionein content in heart muscle (P>0.05) of laying hens. 3) Based on the quadratic curve regression prediction, the average daily feed consumption was the lowest during the whole period when the zinc sulfate supplemental level was 75 mg/kg. In conclusion, different supplemental levels of zinc sulfate have no significant effects on egg production performance of Jinghong laying hens during peak egg production period.

Key words： zinc sulfate; laying hen; egg production performance; metallothionein

Cite this article

ZHENG Aijuan, BAI Jie, CAI Huiyi, CHEN Zhimin, CHANG Wenhuan, DENG Xuejuan, LIU Guohua . Effects of Dietary Zinc Sulfate on Egg Production Performance of Jinghong Laying Hens[J]. Chinese Journal of Animal Nutrition, 2018 , 30(6) : 2109 -2117 . DOI: 10.3969/j.issn.1006-267x.2018.06.013

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