Wang Zhongcheng, Yu Huimin, Wu Xuezhuang, Zhang Tietao, Cui Hu, Wan Chunmeng, Gao Xiuhua
Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
Biol Trace Elem Res. 2016 Oct;173(2):475-82. doi: 10.1007/s12011-016-0654-y. Epub 2016 Feb 27.
The experiment was conducted to investigate the effects of zinc pectin oligosaccharides (Zn-POS) chelate on growth performance, nutrient digestibility, and tissue zinc concentrations of Arbor Acre broilers aged from 1 to 42 days. A total of 576 1-day-old broilers were randomly assigned into 4 groups with 9 replicates per group and 16 chicks per replicate. Chicks were fed either a basal diet (control) or basal diet supplemented with Zn-POS at 300 (Zn-POS-300), 600 (Zn-POS-600), or 900 mg/kg (Zn-POS-900), respectively, for 42 days. A 3-day metabolism trial was conducted during the last week of the experiment feeding. The average daily gain and the average daily feed intake of Zn-POS-600 were significantly higher (P < 0.05) than those of either the control, Zn-POS-300, or Zn-POS-900. Zn-POS-600 had the highest apparent digestibility of dry matter, crude protein, and metabolic energy among all groups. The control group had the lowest apparent digestibility of dry matter (P < 0.05), whereas the apparent digestibility of dry matter in Zn-POS-600 was higher (P < 0.05) than that of Zn-POS-300. The apparent digestibility of crude protein in Zn-POS-600 or Zn-POS-900 was higher (P < 0.05) compared to Zn-POS-300 or the control. The apparent digestibility of metabolic energy in Zn-POS-600 or Zn-POS-900 was higher (P < 0.05) than that of Zn-POS-300. Zn-POS-600 had the highest liver zinc concentrations (P < 0.05), while Zn-POS-900 had the highest pancreatic zinc concentrations (P < 0.05). Our data suggest that the supplementation of 600 mg/kg Zn-POS is optimal in improving the average daily gain and the average daily feed intake, utilization of dietary dry matter and crude protein, and increasing tissue zinc concentrations in liver and pancreas of broilers.
本试验旨在研究果胶寡糖锌（Zn-POS）螯合物对1至42日龄爱拔益加肉鸡生长性能、养分消化率及组织锌浓度的影响。选取576只1日龄肉鸡，随机分为4组，每组9个重复，每个重复16只鸡。雏鸡分别饲喂基础日粮（对照组）或添加300（Zn-POS-300）、600（Zn-POS-600）或900 mg/kg Zn-POS（Zn-POS-900）的基础日粮，为期42天。在试验期的最后一周进行了为期3天的代谢试验。Zn-POS-600组的平均日增重和平均日采食量显著高于对照组、Zn-POS-300组或Zn-POS-900组（P<0.05）。Zn-POS-600组的干物质、粗蛋白和代谢能表观消化率在所有组中最高。对照组的干物质表观消化率最低（P<0.05），而Zn-POS-600组的干物质表观消化率高于Zn-POS-300组（P<0.05）。与Zn-POS-300组或对照组相比，Zn-POS-600组或Zn-POS-900组的粗蛋白表观消化率更高（P<0.05）。Zn-POS-600组或Zn-POS-900组的代谢能表观消化率高于Zn-POS-300组（P<0.05）。Zn-POS-600组的肝脏锌浓度最高（P<0.05），而Zn-POS-900组的胰腺锌浓度最高（P<0.05）。我们的数据表明，添加600 mg/kg Zn-POS最有利于提高肉鸡的平均日增重和平均日采食量，提高日粮干物质和粗蛋白的利用率，并增加肝脏和胰腺中的组织锌浓度。
