Feed Science and Technology

Grape Seed Extract:Effects on Performance and Yolk Cholesterol Content in Laying Hens

  • HU Rujiu ,
  • WANG Ying ,
  • WANG Xiao ,
  • YANG Ting ,
  • CHEN Si ,
  • YANG Xiaojun ,
  • YAO Junhu
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  • College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China

Received date: 2013-03-15

  Online published: 2013-08-18

Abstract

The current study was conducted to evaluate the effects of grape seed extract (GSE) on performance and yolk cholesterol content in laying hens. A total of 450 'Lohmann-White' laying hens aged 40 weeks were assigned to 6 groups in a completely randomized design. Each group consisted of five replicates with fifteen layers per replicate. The experimental diets were a blank control diet containing no GSE, a positive control diet containing copper sulfate (125 mg/kg Cu) and the diets containing 100, 200, 400 or 800 mg/kg GSE. The preliminary test lasted for 7 days and the experiment lasted for 42 days. The results showed as follows: 1) adding 800 mg/kg GSE significantly decreased average daily feed intake (P<0.05), but did not affect average egg weight (P>0.05), and adding 100 mg/kg GSE significantly improved laying rate (P<0.01) and reduced feed/egg ratio (P<0.05), while adding 125 mg/kg Cu significantly decreased laying rate and improved feed/egg ratio (P<0.05). 2) Adding 400 and 800 mg/kg GSE significantly increased eggshell thickness (P<0.05), and adding 800 mg/kg GSE significantly increased albumen height, but did not affect eggshell height, Haugh unit and yolk color (P>0.05). 3) Yolk cholesterol content in all GSE groups and 125 mg/kg Cu group was significantly lower than that in the blank control group (P<0.01), but there was no significant difference among 125 mg/kg Cu group, 100 mg/kg GSE group and 200 mg/kg GSE group (P>0.05). Based on the results of the experiment, it is concluded that adding GSE in the diet for laying henrs at 100 mg/kg level is better than 125 mg/kg Cu for significantly reducing yolk cholesterol content and significantly improving laying rate.

Cite this article

HU Rujiu , WANG Ying , WANG Xiao , YANG Ting , CHEN Si , YANG Xiaojun , YAO Junhu . Grape Seed Extract:Effects on Performance and Yolk Cholesterol Content in Laying Hens[J]. Chinese Journal of Animal Nutrition, 2013 , 25(9) : 2074 -2081 . DOI: 10.3969/j.issn.1006-267x.2013.09.021

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