Abstract
An experiment was carried out to determine the bioavailability of the organic Zn-methionine chelate relative to inorganic Zn source (ZnSO4•7H2O) for broiler chicks fed a conventional corn–soybean meal diet. A total of 504 1-day-old Arbor Acres commercial male broiler chicks were randomly allotted to one of seven treatments in a completely randomized design involving a 2 × 3 factorial arrangement with three levels of added Zn (30, 60, or 90 mg of Zn/kg) and two Zn sources (Zn-methionine chelate and Zn sulfate) plus a Zn-unsupplemented control diet containing 29.2 mg of Zn/kg by analysis for an experimental phase of 21 days. Bone and pancreas were collected for testing Zn concentrations and pancreas metallothionein (MT) messenger RNA (mRNA) level at 7 or 21 days of age. The results showed that bone and pancreas Zn concentrations and MT mRNA level in pancreas increased linearly (P < 0.0001) at 7 or 21 days of age as added Zn level increased. Based on slope ratios from multiple linear regressions of the pancreas, MT mRNA level at 7 days and pancreas Zn concentration at 21 days on added Zn level and the bioavailability values of the Zn-methionine chelate relative to ZnSO4•7H2O (100 %) were 120 and 115 %, respectively (P > 0.22). The results indicated that the Zn from the Zn-methionine chelate was just as bioavailable as the Zn from Zn sulfate for broilers.
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Acknowledgments
This work was supported by Shandong Heshi Group Corporation Limited, the Key International Cooperation Program of the National Natural Science Foundation of China (project no. 31110103916; Beijing, People’s Republic of China), China Agriculture Research System (project no. CARS-42; Beijing, People’s Republic of China), and the Agricultural Science and Technology Innovation Program (ASTIP-IAS08; Beijing, People’s Republic of China).
Compliance with Ethical Standards
All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.
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Suo, H., Lu, L., Zhang, L. et al. Relative Bioavailability of Zinc-Methionine Chelate for Broilers Fed a Conventional Corn–Soybean Meal Diet. Biol Trace Elem Res 165, 206–213 (2015). https://doi.org/10.1007/s12011-015-0252-4
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DOI: https://doi.org/10.1007/s12011-015-0252-4