The aim of this study was to determine whether dietary supplementation with zinc oxide nanoparticales (NP-ZnO) as a substitute for the conventional ZnO affects the intestinal digestibility of selected minerals, growth performance and meat quality in turkeys. The replacement of ZnO with NP-ZnO had no effect on the intestinal digestibility of Zn, Cu, Fe and Ca, whereas the lowest dose of supplemental Zn reduced Zn digestibility. The applied inclusion levels and sources of Zn had no effect on the growth performance (except the feed intake) of turkeys, including liveability. No differences in the relative weights of the heart, spleen and bursa of Fabricius (except the liver), or the weights of the femur and tibia were found between the dietary treatments. Neither the dose nor the source of supplemental Zn influenced carcass dressing percentage or the share of breast, thigh and drumstick muscles in the carcass. In comparison with the highest and moderate doses of Zn, the lowest inclusion level of Zn contributed to increased yellowness of breast meat (P=0.005). The analyzed doses and sources of supplemental Zn exerted varied effects on the redox status of fresh and frozen breast meat. In conclusion, the growth performance of turkeys, carcass yield and composition as well as the redox status of fresh and frozen breast meat were generally similar, regardless of the dietary source and level of Zn. The beneficial effect of Zn addition at 100 mg/kg was improved Zn and Ca digestibility, and increased redness of breast meat.

中文翻译：

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补充不同来源和锌水平的火鸡饲粮中选定矿物质的肠道消化率，生长性能和肉质

这项研究的目的是确定膳食补充氧化锌纳米颗粒（NP-ZnO）代替常规ZnO是否会影响所选矿物质的肠消化率，生长性能和火鸡肉的质量。用NP-ZnO代替ZnO对Zn，Cu，Fe和Ca的肠消化率没有影响，而最低剂量的补充Zn会降低Zn的消化率。施用的锌含量和锌源对火鸡的生长性能（除采食量以外）没有影响，包括宜居性。在饮食治疗之间，心脏，Fabricius的脾脏和法氏囊（肝脏除外）的相对重量或股骨和胫骨的重量没有差异。补充锌的剂量或来源均不会影响cas体的敷料百分比或or体中大腿，大腿和鸡腿肌肉的比例。与最高和中等剂量的Zn相比，Zn的最低夹杂物含量导致胸肉泛黄（P = 0.005）。分析的补充锌的剂量和来源对新鲜和冷冻胸脯肉的氧化还原状态产生了不同的影响。总之，无论锌的饮食来源和水平如何，火鸡的生长性能，car体产量和组成以及新鲜和冷冻胸脯肉的氧化还原状态大致相似。以100 mg / kg添加Zn的有益作用是改善Zn和Ca的消化率，并增加乳房发红。与最高和中等剂量的Zn相比，Zn的最低夹杂物含量导致胸肉泛黄（P = 0.005）。分析的补充锌的剂量和来源对新鲜和冷冻胸脯肉的氧化还原状态产生了不同的影响。总之，无论锌的饮食来源和水平如何，火鸡的生长性能，car体产量和组成以及新鲜和冷冻胸脯肉的氧化还原状态大致相似。以100 mg / kg添加Zn的有益作用是改善Zn和Ca的消化率，并增加乳房发红。与最高和中等剂量的Zn相比，Zn的最低夹杂物含量导致胸肉泛黄（P = 0.005）。分析的补充锌的剂量和来源对新鲜和冷冻胸脯肉的氧化还原状态产生了不同的影响。总之，无论锌的饮食来源和水平如何，火鸡的生长性能，car体产量和组成以及新鲜和冷冻胸脯肉的氧化还原状态大致相似。以100 mg / kg添加Zn的有益作用是改善Zn和Ca的消化率，并增加乳房发红。分析的补充锌的剂量和来源对新鲜和冷冻胸脯肉的氧化还原状态产生了不同的影响。总之，无论锌的饮食来源和水平如何，火鸡的生长性能，car体产量和组成以及新鲜和冷冻胸脯肉的氧化还原状态大致相似。以100 mg / kg添加Zn的有益作用是改善Zn和Ca的消化率，并增加乳房发红。分析的补充锌的剂量和来源对新鲜和冷冻胸脯肉的氧化还原状态产生了不同的影响。总之，无论锌的饮食来源和水平如何，火鸡的生长性能，car体产量和组成以及新鲜和冷冻胸脯肉的氧化还原状态大致相似。以100 mg / kg添加Zn的有益作用是改善Zn和Ca的消化率，并增加乳房发红。