文献类型： 外文期刊
作者： Cui, Yiyan 1 ; Tian, Zhimei 1 ; Lu, Huijie 1 ; Deng, Dun 1 ; Liu, Zhichang 1 ; Rong, Ting 1 ; Ma, Xianyong 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Inst Anim Sci, Guangzhou, Peoples R China
2.State Key Lab Livestock & Poultry Breeding, Guangzhou, Peoples R China
3.Minist Agr, Key Lab Anim Nutr & Feed Sci South China, Guangzhou, Peoples R China
4.Guangdong Prov Key Lab Anim Breeding & Nutr, Guangzhou, Peoples R China
5.Guangdong Engn Technol Res Ctr Anim Meat Qual & S, Guangzhou, Peoples R China
6.Guangdong Lab Lingnan Modern Agr, Maoming Branch, Maoming, Peoples R China
关键词： Zinc oxide nanoparticles; Gut health; Zinc; Piglets
期刊名称：LIVESTOCK SCIENCE （ 影响因子：1.943； 五年影响因子：2.252 ）
ISSN： 1871-1413
年卷期： 2021 年 251 卷
页码：
收录情况： SCI
摘要： This study investigated the effects of zinc oxide nanoparticles (ZnO-N) on growth performance, gut health, and zinc and copper excretion in piglets. A total of 144 piglets (Duroc x Landrace x Large White, weaned at 21 days; mean initial weight 6.15 +/- 0.01 kg) were assigned to six groups with six replicates of four pigs per pen for a 26day feeding trial. The groups were: antibiotic group (basal diet + 75 mg/kg aureomycin), ZnO group (basal diet + 1,600 mg/kg zinc oxide), and four ZnO-N groups (basal diet + 200, 300, 400, or 500 mg/kg ZnO-N, respectively). No significant difference in growth performance was observed amongst the treatments. ZnO-N supplementation improved the activities of superoxide dismutase (linear or quadratic, p < 0.05), copper-zinc superoxide dismutase in the ileum (linear, p < 0.05), catalase in the jejunum and ileum (linear or quadratic, p < 0.05), total antioxidant capacity of duodenum and ileum (linear, p < 0.05), and glutathione peroxidase in the ileum (linear, p < 0.05), and reduced malondialdehyde content in the jejunum (linear, p < 0.05). As ZnO-N content was increased, the contents of jejunal IgA, interleukin (IL)-6, and IL-10 decreased (linear, p < 0.05), while IgM content increased (linear, p < 0.05). The contents of ileal IgA and IL-10 increased (linear and quadratic, p < 0.05), while the contents of IgM, IgG, and IL-6 decreased (linear or quadratic, p < 0.05). Villus height and the ratio of villus height to crypt depth in piglets fed with ZnO-N were higher than in the antibiotic group (p < 0.05). Pigs fed with 200-500 mg/kg ZnO-N showed lower contents of hepatic zinc and copper and faecal zinc than the ZnO group (p < 0.05). These results show that dietary ZnO-N enhanced intestinal antioxidant and immune capacity and intestinal morphology, particularly 500 mg/kg ZnO-N, and also that ZnO-N minimised zinc content in the liver and faeces.
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