Yu Yu, Lu Lin, Li Su-Fen, Zhang Li-Yang, Luo Xu-Gang
1Mineral Nutrition Research Division,Institute of Animal Science,Chinese Academy of Agricultural Sciences,Beijing 100094,People's Republic of China.
Br J Nutr. 2017 Apr;117(8):1086-1094. doi: 10.1017/S0007114517001040. Epub 2017 May 22.
In Expt 1, a Zn-unsupplemented basal diet (control) and the basal diet supplemented with one of four different Zn sources, including ZnSO4, Zn-amino acid chelate with a weak chelation strength (Zn-AA W), Zn-protein chelate with a moderate chelation strength (Zn-Pro M) and Zn-protein chelate with a strong chelation strength (Zn-Pro S) were fed to broiler chickens from days 14 to 28. On day 28, Zn content in plasma from the hepatic portal vein increased (P0·05) and Zn-AA W(P<0·04) were higher than those for ZnSO4. These findings indicate that organic Zn absorption (especially Zn-Pro S) in intact living broilers was more effective than that of inorganic Zn; organic Zn absorption in the ligated duodenal segment was a saturable carrier-mediated process similar to that of ZnSO4. Moreover, except for MT, there might be other Zn transporters involved in Zn absorption that are affected by different Zn sources.
在实验1中，从第14天到第28天，给肉鸡饲喂不添加锌的基础日粮（对照）以及添加四种不同锌源之一的基础日粮，这四种锌源包括硫酸锌、螯合强度较弱的锌氨基酸螯合物（Zn-AA W）、螯合强度中等的锌蛋白螯合物（Zn-Pro M）和螯合强度较强的锌蛋白螯合物（Zn-Pro S）。在第28天，肝门静脉血浆中的锌含量增加（P<0·05），且Zn-AA W组（P<0·04）高于硫酸锌组。这些结果表明，完整活体肉鸡中有机锌的吸收（尤其是Zn-Pro S）比无机锌更有效；结扎十二指肠段中有机锌的吸收是一个类似于硫酸锌的可饱和载体介导过程。此外，除了金属硫蛋白外，可能还有其他参与锌吸收的锌转运体受不同锌源的影响。
