Rao Somu Bala Nageswara, Elangovan Arumbackam Vijayarangam, Madiajagan Bagath, Rajendran Duraisamy, Franklin Magdaline Eljeeva Emerald, Gopi Marappan, Pal Dintaran, Parthipan Sivashanmugam, Nalina M, Dey Debpriyo Kumar, Manjunatha Reddy G B, Awachat Vaibhav Bhagwan
ICAR-National Institute of Animal Nutrition and Physiology, Bengaluru, India.
Southern Regional Station, ICAR-National Dairy Research Institute, Bengaluru, India.
Biol Trace Elem Res. 2023 Dec;201(12):5774-5785. doi: 10.1007/s12011-023-03614-2. Epub 2023 Mar 13.
The present study was undertaken for the production of encapsulated zinc and its evaluation in broiler chicken diet. The process of microencapsulation involved the use of polymers, gum arabic and maltodextrin with a maximum encapsulation of efficiency of 66%. Encapsulated material contained about 20% zinc oxide (ZnO) as core material following the freeze-drying process. One hundred and ninety-two-day-old broiler chicks were distributed in four groups in six replications having eight birds in each. The four groups comprised control (inorganic source of zinc), En-Zn-100 (encapsulated zinc at 100% of control), En-Zn-50 (encapsulated zinc at 50% of control), and Org-Zn-50 (Zn-methionine at 50% of control). The experiment was carried out for 35 days following standard management practices. The live weight gain, feed intake and FCR were comparable among groups. Plasma and muscle zinc (ppm) content was unaffected by the level or source of zinc supplementation. The zinc apparent ileal digestibility coefficient was significantly (P < 0.05) higher in En-Zn-50 fed groups, while crude protein digestibility was not affected by the level or form of Zn supplementation. Bone weight, length, and zinc content were comparable, and bone ash content was significantly different among the groups. Relative expression of ZnT2 was significantly upregulated in encapsulated zinc-fed groups. From the study, it could be concluded that supplementation of zinc either as encapsulated or organic form at 50% of inorganic source (ZnO) could be sufficient to maintain the growth performance, serum, tissue and bone mineral content in broiler chicken.
本研究旨在生产包封锌并在肉鸡日粮中对其进行评估。微胶囊化过程涉及使用聚合物、阿拉伯胶和麦芽糊精，最大包封效率为66%。经过冷冻干燥过程后，包封材料含有约20%的氧化锌（ZnO）作为核心材料。192只1日龄的肉鸡被分为四组，每组六个重复，每个重复八只鸡。四组分别为对照组（锌的无机来源）、En-Zn-100（包封锌含量为对照组的100%）、En-Zn-50（包封锌含量为对照组的50%）和Org-Zn-50（蛋氨酸锌含量为对照组的50%）。按照标准管理方法进行了35天的试验。各组之间的活体重增加、采食量和饲料转化率相当。血浆和肌肉中的锌（ppm）含量不受锌添加水平或来源的影响。En-Zn-50饲喂组的锌回肠表观消化率系数显著更高（P < 0.05），而粗蛋白消化率不受锌添加水平或形式的影响。各组之间的骨重、骨长和锌含量相当，但骨灰含量有显著差异。在饲喂包封锌的组中，ZnT2的相对表达显著上调。从该研究可以得出结论，以无机来源（ZnO）的50%补充包封形式或有机形式的锌足以维持肉鸡的生长性能、血清、组织和骨骼矿物质含量。
