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Dietary supplementation with sodium humate improves egg quality and immune function of laying hens

In: Journal of Applied Animal Nutrition
Authors:
A.R. Zhang Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural Affairs & National Engineering Research Center of Biological Feed Development, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China P.R.;

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S.A. Pirzado Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural Affairs & National Engineering Research Center of Biological Feed Development, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China P.R.;

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G.H. Liu Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural Affairs & National Engineering Research Center of Biological Feed Development, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China P.R.;

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Z.M. Chen Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural Affairs & National Engineering Research Center of Biological Feed Development, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China P.R.;

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W.H. Chang Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural Affairs & National Engineering Research Center of Biological Feed Development, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China P.R.;

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H.Y. Cai Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural Affairs & National Engineering Research Center of Biological Feed Development, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China P.R.;

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W.L. Bryden School of Agriculture and Food Sciences, University of Queensland, Gatton, QLD 4343, Australia

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A.J. Zheng Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural Affairs & National Engineering Research Center of Biological Feed Development, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China P.R.;

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Open Access

Abstract

The aim of this study was to evaluate the influence of the dietary addition of sodium humate (HAS) on performance and immune response of laying hens during peak lay, over an eight-week period. Laying hens, aged 24 weeks old, were randomly allotted to four dietary treatments: a basal control diet or the basal diet supplemented with 0.1, 0.3 or 0.5% HAS. Each treatment had six replicates with 15 layers per replicate. Egg production, egg quality, serum antioxidant parameters and immunity indexes were measured. HAS had no significant effect on egg production or egg and shell quality, but all supplemental levels significantly improved Haugh unit values and egg yolk colour. Supplementation with all levels of HAS significantly increased serum immunoglobuline (Ig) level compared to the hens fed the control diet. Feeding either 0.1 or 0.5% HAS significantly increased serum IgM levels. The results indicated that dietary supplementation with HAS can enhance egg albumin quality and improve immunity in laying hens.

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