Feed Security

Effects of Dietary Free Gossypol Levels on Liver Gossypol Accumulation, Performance and Egg Quality of Laying Hens

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  • College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271000, China

Received date: 2015-07-27

  Online published: 2015-10-15

Abstract

This experiment was conducted to investigate the effects of hepatic gossypol accumulation and the performance and egg quality of laying hens which long-term feeding with diet containing free gossypol, in order to provide theoretical support to make better use of cotton meal resources.Two hundred and seventy Hy-Line brown laying hens of 23-week-old were randomly subjected to three groups for 45 weeks, the content of free gossypol in three diets was 0, 20 and 40 mg/kg, respectively.The results showed that laying hens fed with free gossypol diet for long-term induced the accumulation of free gossypol in the liver, lead to disorder and injury of hepatic cell structure.Compared with the control group, long-term fed with free gossypol diets had no significantly effect on performance and laying performance of laying hens (P>0.05), but significantly increased the mortality and elimination rate at later stage (from 31 to 45 weeks) and increased yolk color from 1 to 10 weeks (P<0.05).It is concluded that long-term feeding with gossypol diet can result in accumulation of free gossypol in hens' liver, and then the gossypol toxicity induce liver injury and affect liver function.Although diets containing 20 or 40 mg/kg free gossypol have little effect on the performance and laying performance of laying hens, but the mortality and elimination rate at later stage of hens are significant high.Results indicate that the higher mortality and elimination rate of hens may be connected with the cumulative toxicity of gossypol in liver.

Cite this article

JIAO Hongchao, HOU Nannan, JIANG Mingjun, SONG Zhigang, LIN Hai . Effects of Dietary Free Gossypol Levels on Liver Gossypol Accumulation, Performance and Egg Quality of Laying Hens[J]. Chinese Journal of Animal Nutrition, 2015 , 27(10) : 3207 -3217 . DOI: 10.3969/j.issn.1006-267x.2015.10.028

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