Feed Science and Technology

Effects of Schizochytrium Powder on Performance, Egg Quality, Serum Biochemical Indices and Yolk Ducosahexenoic Acid Content of Laying Hens

  • CHEN Xiuli ,
  • YUE Hongyuan ,
  • LI Lianbin ,
  • SONG Dan ,
  • CAO Shehui ,
  • WU Shugeng
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  • 1. College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China;
    2. National Engineering Research Center of Biological Feed, Feed Research Institute of Chinese Academy of Agricultural Sciences, Beijing 100081, China

Received date: 2013-10-17

  Online published: 2014-03-04

Abstract

This experiment was conducted to investigate the effects of diet supplemented with different levels of Schizochytrium (SL) powder on performance, egg quality, serum biochemical indices and yolk ducosahexenoic acid (DHA) content of laying hens. Two hundred and eighty eight Hy-Line brown laying hens aged 29 weeks were randomly divided into 4 groups with 6 replicates per group and 12 hens per replicate. Hens in the four groups were fed the basal diets supplemented with 0 (control), 1%, 2% and 3% SL powder, respectively. The experiment lasted for 6 weeks. The results showed as follows: 1) dietary SL powder supplemental level had no significant effects on laying rate, average egg weight and the ratio of feed to egg (P>0.05). 2) Dietary SL powder supplemental level had no significant effects on egg-shape index, eggshell thickness, eggshell strength, Haugh unit and albumen height (P>0.05), the yolk color in 1% SL powder group was significantly higher than that in other groups (P<0.05). 3) The contents of total cholesterol, triglyeride and low density lipoprotein-cholesterol in serum in 1% and 2% SL powder groups were significantly lower than those in control group (P<0.05). 4) The contents of ω-3 polyunsaturated fatty acid and DHA in egg yolk were linear improved with the dietary SL powder supplemental level increasing, and reduced the ratio of ω-6 to ω-3. However, the yolk DHA content did not continue to increase when SL powder supplemental level exceed 2%, and DHA enrichment in eggs could be saturated in 15 days. The results suggest that under this experimental condition, dietary supplementation of 2% SL powder can improve the yolk DHA content of hens, and have no negative effect on performance and egg quality.

Cite this article

CHEN Xiuli , YUE Hongyuan , LI Lianbin , SONG Dan , CAO Shehui , WU Shugeng . Effects of Schizochytrium Powder on Performance, Egg Quality, Serum Biochemical Indices and Yolk Ducosahexenoic Acid Content of Laying Hens[J]. Chinese Journal of Animal Nutrition, 2014 , 26(3) : 701 -709 . DOI: 10.3969/j.issn.1006-267x.2014.03.020

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