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Relative Bioavailability of Zinc-Methionine Chelate for Broilers Fed a Conventional Corn–Soybean Meal Diet

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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 cornsoybean 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).

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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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Correspondence to Xugang Luo.

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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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