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Journal of Integrative Agriculture  2015, Vol. 14 Issue (10): 2042-2049    DOI: 10.1016/S2095-3119(15)61033-4
Animal Science · Veterinary Science Advanced Online Publication | Current Issue | Archive | Adv Search |
Relative bioavailability of tribasic zinc sulfate for broilers fed a conventional corn-soybean meal diet
 LI  Wen-xiang, MA  Xin-yan, LU  Lin, ZHANG  Li-yang, LUO  Xu-gang
1、Mineral Nutrition Research Division, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193,P.R.China
2、Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510000, P.R.China
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摘要  An experiment was carried out to investigate the relative bioavailability of tribasic zinc (Zn) sulfate relative to Zn sulfate for broilers fed a conventional corn-soybean meal diet. A total of 504 1-d-old Arbor Acres commercial male chicks were randomly assigned by body weight of birds to one of seven treatments involving a 2×3 factorial arrangement with three levels of added Zn (30, 60, or 90 mg of Zn kg–1) and two Zn sources (tribasic Zn sulfate and Zn sulfate) plus a control with no added Zn for an experimental phase of 14 d. Plasma Zn, tibia ash Zn, pancreas Zn, and pancreas metallothionein (MT) messenger RNA (mRNA) were analyzed at 6 or 14 d of age post-hatching. The results showed that plasma Zn, tibia ash Zn, pancreas Zn, and pancreas MT mRNA increased linearly (P<0.002) as dietary Zn concentration increased at 6 or 14 d of age. The R2 for a linear model was greater on d 6 than on d 14 for the above 4 responsive criteria, and among these indices, the fitting of the tibia ash Zn concentration was the best (R2=0.99). Therefore, based on slope ratios from the multiple linear regressions of the above 4 indices of the birds at 6 d of age on daily intake of dietary Zn, the bioavailabilities of tribasic Zn sulfate relative to Zn sulfate (100%) were 95.6% (P=0.18), 83.5% (P=0.01), 87.9% (P=0.53), and 75.9% (P=0.38) for the tibia ash Zn, pancreas Zn, plasma Zn, and pancreas MT mRNA, respectively. The results indicated that generally, Zn from tribasic Zn sulfate was as available as Zn from Zn sulfate for broilers.

Abstract  An experiment was carried out to investigate the relative bioavailability of tribasic zinc (Zn) sulfate relative to Zn sulfate for broilers fed a conventional corn-soybean meal diet. A total of 504 1-d-old Arbor Acres commercial male chicks were randomly assigned by body weight of birds to one of seven treatments involving a 2×3 factorial arrangement with three levels of added Zn (30, 60, or 90 mg of Zn kg–1) and two Zn sources (tribasic Zn sulfate and Zn sulfate) plus a control with no added Zn for an experimental phase of 14 d. Plasma Zn, tibia ash Zn, pancreas Zn, and pancreas metallothionein (MT) messenger RNA (mRNA) were analyzed at 6 or 14 d of age post-hatching. The results showed that plasma Zn, tibia ash Zn, pancreas Zn, and pancreas MT mRNA increased linearly (P<0.002) as dietary Zn concentration increased at 6 or 14 d of age. The R2 for a linear model was greater on d 6 than on d 14 for the above 4 responsive criteria, and among these indices, the fitting of the tibia ash Zn concentration was the best (R2=0.99). Therefore, based on slope ratios from the multiple linear regressions of the above 4 indices of the birds at 6 d of age on daily intake of dietary Zn, the bioavailabilities of tribasic Zn sulfate relative to Zn sulfate (100%) were 95.6% (P=0.18), 83.5% (P=0.01), 87.9% (P=0.53), and 75.9% (P=0.38) for the tibia ash Zn, pancreas Zn, plasma Zn, and pancreas MT mRNA, respectively. The results indicated that generally, Zn from tribasic Zn sulfate was as available as Zn from Zn sulfate for broilers.
Keywords:  tribasic zinc sulfate       bioavailability       Zn concentration       MT gene expression       broilers  
Received: 21 January 2015   Accepted:
Fund: 

This study was conducted under the support of Changsha Xingjia Bioengineering Co., Ltd., China, the Agricultural Science and Technology Innovation Program, China (ASTIPIAS08), and the China Agriculture Research System, China (CARS-42).

Corresponding Authors:  LUO Xu-gang,Tel: +86-10-62816012, Fax: +86-10-62810184,E-mail: wlysz@263.net     E-mail:  wlysz@263.net
About author:  LI Wen-xiang, E-mail: 449111937@qq.com; MA Xin-yan,E-mail: dk051maxy@163.com;

Cite this article: 

LI Wen-xiang, MA Xin-yan, LU Lin, ZHANG Li-yang, LUO Xu-gang. 2015. Relative bioavailability of tribasic zinc sulfate for broilers fed a conventional corn-soybean meal diet. Journal of Integrative Agriculture, 14(10): 2042-2049.

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