Effects of Yolk Immunoglobulin on Growth Performance and Immune Function of Chicks

YANG Haiming; JU Xiaojun; WANG Zhiyue; MA Yinpeng; MA Yiguo; ZHANG Jianping

doi:10.3969/j.issn.1006-267x.2016.11.009

Chinese Journal of Animal Nutrition >

2016 , Vol. 28 >Issue 11: 3429 - 3436

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.11.009

POULTRY NUTRITION

Effects of Yolk Immunoglobulin on Growth Performance and Immune Function of Chicks

YANG Haiming ,
JU Xiaojun ,
WANG Zhiyue ,
MA Yinpeng ,
MA Yiguo ,
ZHANG Jianping

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1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China;
2. Jinhu County Lvliang Center Veterinary, Jinhu 211621, China

Received date: 2016-05-24

Online published: 2016-11-18

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Abstract

This experiment was conducted to study the effects of dietary yolk immunoglobulin (IgY) on growth performance and immune function of chicks. Two hundred and forty one-day-old Roman rooster hens with same batch of hatching and similar body weight were randomly divided into 2 groups (control and experimental groups) with 6 replicates in each group and 20 chicks in each replicate. Chicks in the control group were fed with a basal diet, and the others in the experimental group fed the basal diet supplemented with 0.1% IgY. The experiment lasted for 5 weeks. At the age of 1, 3 and 5 weeks, 2 chickens with average weight of each replicate were weighed, slaughtered, and the blood was collected for the serum immune parameters, and then the immune organ, jejunum chyme were taken and used for the determination of relevant indicators. The results showed as follows:1) compared with the control group, the average daily gain of chicks in experimental group had a tendency to increased at the age of 1, 3 and 5 weeks (0.05 < P < 0.10). 2) The thymus relatively weight of chicks at the age of 1 and 5 weeks and spleen relatively weight of chicks at age of 1 week in experimental group were significantly higher than those in control group (P<0.05). The content of IgY in bursa of Fabricius, spleen and thymus of chicks at the age of 1 and 5 weeks in experimental group had no significant difference with what in control group (P>0.05). 3) The content of globulin, α-interferon interleukin-2 and the activity of lysozyme in serum of chicks at the age of 1 week, the content of total protein, globulin and interleukin-2 in serum of chicks at the age of 3 weeks, and the number of blood lymphocytes of chicks at the age of 5 weeks in experimental group were significantly higher than those in control group (P<0.05). 4) The content of secretory immunoglobulin A in intestinal tract chyme of chicks at the age of 1 week in experimental group was significantly higher than that in control group (P<0.05). In conclusion, dietary supplementation of IgY can enhance growth performance and immune function at the age of 1 to 5 weeks. But from the perspective of improving immune function, the effect at early stage of brood (1 to 3 weeks of age) is more obvious.

Key words： chicks; yolk immunoglobulin; growth performance; immune function

Cite this article

YANG Haiming , JU Xiaojun , WANG Zhiyue , MA Yinpeng , MA Yiguo , ZHANG Jianping . Effects of Yolk Immunoglobulin on Growth Performance and Immune Function of Chicks[J]. Chinese Journal of Animal Nutrition, 2016 , 28(11) : 3429 -3436 . DOI: 10.3969/j.issn.1006-267x.2016.11.009

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