title: Relative bioavailability of zinc-methionine chelate for broilers fed a conventional corn-soybean meal diet.
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.
authors: Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, People's Republic of China.
authors: Haiqing
authors: H
authors: Suo
authors: Lin
authors: L
authors: Lu
authors: Liyang
authors: L
authors: Zhang
authors: Xueyuan
authors: X
authors: Zhang
authors: Hua
authors: H
authors: Li
authors: Yufei
authors: Y
authors: Lu
authors: Xugang
authors: X
authors: Luo
mesh_terms: D000821:Animal Feed; D000818:Animals; D001682:Biological Availability; D002614:Chelating Agents / Q000737:chemistry; D002645:Chickens; D005527:Food, Fortified; D016014:Linear Models; D008297:Male; D008715:Methionine / Q000737:chemistry*; D010179:Pancreas / Q000187:drug effects / Q000378:metabolism; D011200:Poultry; D012333:RNA, Messenger / Q000378:metabolism; D011897:Random Allocation; D013025:Glycine max / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*; D019287:Zinc Sulfate / Q000737:chemistry
chemical_list: D002614:Chelating Agents; D012333:RNA, Messenger; D019287:Zinc Sulfate; D008715:Methionine; D015032:Zinc