Evaluation of Biological Safety of Chromium Picolinate for Laying Hens

WANG Gang; SUN Xiaoming; LIAO Xiudong; ZHANG Liyang; LYU Lin; LAN Yunxian; LUO Xugang

doi:10.3969/j.issn.1006-267x.2017.01.024

Chinese Journal of Animal Nutrition >

2017 , Vol. 29 >Issue 1: 214 - 223

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.01.024

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Evaluation of Biological Safety of Chromium Picolinate for Laying Hens

WANG Gang ,
SUN Xiaoming ,
LIAO Xiudong ,
ZHANG Liyang ,
LYU Lin ,
LAN Yunxian ,
LUO Xugang

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1. Southwest University Rongchang Capmus, Chongqing 402460, China;
2. Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China

Received date: 2016-07-14

Online published: 2017-01-16

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Abstract

This experiment was conducted to investigate the effects of dietary different supplemental levels of chromium picolinate (Cr-Pic) on laying performance, physiological and biochemical parameters in blood, organs indices and histopathological changes of laying hens, so as to evaluate the biological safety of Cr-Pic for laying hens. A total of 360 twenty three-week-old Beijing red commercial laying hens with similar laying rate and body weight were randomly allocated to 4 groups with 6 replicates per group and 15 chicks per replicate in a completely randomized design. Hens were fed a corn-soybean meal basal diet and the basal diet supplemented with 0.6, 4.0 or 6.0 mg/kg Cr-Pic (as chromium), respectively. The preliminary trial period was 21 days and the experimental period was 70 days. The results showed as follows:1) dietary chromium supplemental level did not affect the laying performance and organ indices of laying hens (P>0.05). 2) Dietary chromium supplemental level significantly increased the plasma glutamic-oxalacetic transaminase (GOT) activity of laying hens at the 35th days (P<0.05), but dietary chromium supplemental level did not affect the blood physiological parameters and other plasma biochemical parameters (P>0.05). 3) Dietary chromium supplemental level had no significant influence on the development of major visceral organs, and had no histopathological changes in the heart, liver, kidney, ovary and uterus part of the uterine tube. In conclusion, the current dietary allowance for chromium is 0.6 mg/kg, therefore, the addition of 6.0 mg/kg chromium (as Cr-Pic) to diet which is 10 times of the allowance is safe for laying hens.

Key words： chromium picolinate; biological safety evaluation; laying hen

Cite this article

WANG Gang , SUN Xiaoming , LIAO Xiudong , ZHANG Liyang , LYU Lin , LAN Yunxian , LUO Xugang . Evaluation of Biological Safety of Chromium Picolinate for Laying Hens[J]. Chinese Journal of Animal Nutrition, 2017 , 29(1) : 214 -223 . DOI: 10.3969/j.issn.1006-267x.2017.01.024

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