文献类型： 外文期刊

第一作者： Xiong, Yunxia

作者： Xiong, Yunxia;Li, Yaojie;Wu, Qiwen;Xiao, Huaqin;Cao, Shuting;Yang, Xuefen;Gao, Kaiguo;Jiang, Zongyong;Hu, Shenglan;Wang, Li;Zhao, Fei

作者机构：

关键词： amino acid-chelated trace minerals; meat quality; antioxidant capacity; fecal excretion; growing-finishing pigs

期刊名称：ANIMALS （ 影响因子：2.7； 五年影响因子：3.2 ）

ISSN： 2076-2615

年卷期： 2025 年 15 卷 9 期

页码：

收录情况： SCI

摘要： Simple Summary: Building on our previous research, which demonstrated that replacing 100% inorganic trace minerals with 30% amino acid-chelated minerals significantly enhanced antioxidant capacity and nutrient utilization efficiency and reduced fecal mineral excretion in growing-finishing pigs while preserving growth performance, this study aimed to investigate the feasibility of implementing an even greater reduction in chelated trace mineral supplementation. We found that low-dose substitution of trace minerals did not have any adverse effects on growth performance, carcass traits, meat quality, or nutrient digestibility. Moreover, the organic trace minerals (amino acid chelates) exhibited greater efficacy in enhancing antioxidant activity, as seen through higher antioxidant enzyme activities and lower malondialdehyde content in the liver. They also showed better trace element deposition in the muscle and liver than inorganic minerals. Additionally, both low-dose inorganic and organic trace mineral substitutions effectively reduced fecal emissions of heavy metals, and low-dose organic ones showed greater efficiency, which is an important aspect considering environmental concerns in the livestock industry. The results of this study are of great significance as they provide new insights into the use of different forms and doses of trace minerals in pig diets. Our previous study has shown that replacing 100% inorganic trace minerals with 30% amino acid-chelated ones can enhance antioxidant capacity, improve nutrient digestibility, and reduce fecal excretion in growing-finishing pigs without compromising performance. This study aimed to further reduce the amino acid-chelated trace minerals content in pig diets and assess its impact. Seventy-two growing-finishing barrows (Duroc x Landrace x Yorkshire), with an initial average body weight of 67.04 +/- 0.12 kg, were divided into four groups: negative control (NC, no additional trace minerals), high-dose inorganic trace minerals (HITM, 100% inorganic; 75 mg/kg Fe, 10 mg/kg Cu, 65 mg/kg Zn, 25 mg/kg Mn), and two low-dose groups (15 mg/kg Fe, 4 mg/kg Cu, 12.5 mg/kg Zn, 5 mg/kg Mn) receiving either inorganic sulfates (LITM) or amino acid-chelates (LOTM). The trial concluded when the body weight of pigs reached similar to 130 kg. Results showed that low-dose trace mineral substitution did not adversely affect growth performance, carcass traits, meat quality, or nutrient digestibility in growing-finishing pigs (p > 0.05). The LOTM pigs exhibited significantly higher serum glutathione peroxidase, liver total superoxide dismutase (T-SOD), and CuZn-SOD activities, muscle CuZn-SOD and catalase activities, and lower liver malondialdehyde content compared with LITM (p < 0.05). Muscle CuZn-SOD in LITM was lower than HITM (p < 0.05), but not in LOTM (p > 0.05). LOTM showed significantly higher muscle Fe content and lower muscle Mn content compared with HITM (p < 0.05), yet its muscle Mn level was higher than that of LITM (p < 0.05). Liver Zn content decreased in LITM compared with HITM (p < 0.05), but remained unchanged in LOTM (p > 0.05). Both LITM and LOTM significantly reduced fecal emissions of Fe, Cu, Zn, and Mn compared with HITM (p < 0.05), with greater reductions in Cu, Zn, and Mn in LOTM. In conclusion, low-dose substitution of inorganic or organic trace minerals did not negatively affect growth, carcass traits, meat quality, or nutrient digestibility in growing-finishing pigs, while it effectively reduced fecal heavy metal emissions. Organic trace minerals were more effective in enhancing antioxidant activity and trace mineral deposition.

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