Molecular Nutrition

Effects of Chromium Sources and Chromium Levels on Growth Performance, Immune Organ Indexes and Meat Quality of Broilers under Normal Rearing Condition

  • ZHENG Cancai ,
  • HUANG Yanling ,
  • XIAO Fang
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  • College of Life Science and Technology, Southwest University for Nationalities, Chengdu 610041, China

Received date: 2015-03-25

  Online published: 2015-08-13

Abstract

This experiment was conducted to investigate the effects of dietary chromium (Cr) sources and Cr levels on growth performance, immune organ indexes and meat quality of broilers under normal rearing condition, in order to compare effectiveness and appropriate supplemened level between Cr sources and Cr levels. According to body weight, a total of 252 one-day-old Cobb female broilers were randomly allotted to 7 treatments with 6 replicates per treatment and 6 broilers per replicate in a 1 plus 3×2 design. Broilers were fed a basal corn-soybean meal diet (control) containing 0.32 mg/kg Cr, and the others were fed the basal diets supplemented with 0.4 or 2.0 mg/kg Cr from different sources [Cr propionate (CrPro), Cr picolinate (CrPic), Cr chloride (CrCl3) respectively]. The experiment lasted for 42 days. The results showed as follows: 1) dietary supplemented with Cr had significant effects on the average daily feed intake during 4 to 6 weeks (P<0.05). 2) Dietary supplemented with Cr had tendency of enhancing Bursa of fabricius index (P<0.10); CrCl3 increased thymus index and Bursa of fabricius index better than CrPro and CrPic (P<0.05), while, CrPro and CrPic had no significant difference (P>0.10). 3) Dietary supplemented with Cr increased drip loss of breast muscle (P<0.05); dietary supplemented with 2.0 mg/kg Cr significantly reduced pH15min (P<0.05); compared with CrPic, CrCl3 had a tendency to increase a* value (P=0.08). It is concluded that in normal rearing condition, the Cr content in basal diets can meet the growth requirements of broilers without additional Cr supplementation, and Cr can raise immune organs indexes, especially CrCl3, meanwhile, Cr supplementation can increase drip loss, moreover Cr supplemented with 0.4 mg/kg can maintain meat pH which may have some effects on meat quality.

Cite this article

ZHENG Cancai , HUANG Yanling , XIAO Fang . Effects of Chromium Sources and Chromium Levels on Growth Performance, Immune Organ Indexes and Meat Quality of Broilers under Normal Rearing Condition[J]. Chinese Journal of Animal Nutrition, 2015 , 27(8) : 2378 -2387 . DOI: 10.3969/j.issn.1006-267x.2015.08.009

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