Selection of copper and zinc dosages in pig diets based on the mutual benefit of animal growth and environmental protection
Selection of copper and zinc dosages in pig diets based on the mutual benefit of animal growth and environmental protection
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DOI：
10.1016/j.ecoenv.2021.112177
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发表时间：
2021-04-08
影响因子：
6.8
通讯作者：
Feng, Jie
中科院分区：
文献类型：
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作者：
Ding, Haoxuan;Zhang, Qian;Feng, Jie
饲粮中添加铜和锌有利于动物的生长发育，但粪便中的重金属对生态环境构成威胁，平衡是解决问题的关键。在本研究中，对2000头猪(早育猪，9？15公斤;晚班，15岁？25公斤;种植者:25 ?本试验旨在分析不同饲粮（梯度添加量铜和锌添加剂）对仔猪和生长猪生长性能、抗氧化性能、免疫功能和粪便重金属排泄的影响。尽管在整个育苗期，不同处理的平均日增重（ADG）和平均日采食量（ADFI）没有显著差异，但在饲粮中添加适当高剂量的铜和锌对断奶仔猪的抗氧化状态和免疫功能有有益的影响。特别是在苗期早期，与低铜组（5 mg/kg Cu）相比，高铜组（120 mg/kg Cu）可显著提高血清过氧化物酶（POD）、谷胱甘肽过氧化物酶（GSH-PX）、总抗氧化能力（T-AOC）、过氧化氢酶（CAT）和铜锌超氧化物歧化酶（Cu/Zn-SOD）、皮质醇。此外，饲粮中添加锌和铜不仅提高了血清中相应微量元素的浓度，还影响了血清中其他微量元素的浓度。饲粮中铜和锌含量的降低有助于降低粪便中铜和锌的含量。综上所述，我们制定了铜和锌的互利剂量(9？15公斤：铜5毫克/公斤，锌50毫克/公斤；15？25公斤：铜4毫克/公斤，锌50毫克/公斤；25 ?60 kg: 4 mg/kg Cu和10 mg/kg Zn)，有利于保证动物健康生长，减少环境重金属残留。胶囊：本研究开发了猪日粮中铜和锌的互惠剂量，以促进动物生长和保护环境。
Dietary copper and zinc additives facilitate the growth and development of animals, but heavy metal in feces threatens the ecological environment, and balance is the key to solving the problem. In this study, a trial of 2000 pigs (early nursery, 9?15 kg; late nursery, 15?25 kg; grower: 25?60 kg) was conducted to analyze the effects of different diets (gradient dosage of copper and zinc additives) on growth performance, antioxidant performance, immune function, and fecal heavy metal excretion of piglets and growing pigs. Although no significant differences were observed in average daily gain (ADG) and average daily feed intake (ADFI) between treatments during the entire nursery-grower period, the addition of appropriate high doses of copper and zinc to the diet had a beneficial effect on the antioxidant status and immune function of weaned piglets. Especially at early nursery, compared with the low-copper group (5 mg/kg Cu), the high-copper group (120 mg/kg Cu) could significantly increase the peroxidase (POD), glutathione peroxidase (GSH-PX), total antioxidant capacity (T-AOC), catalase (CAT) and copper/zinc superoxide dismutase (Cu/Zn-SOD), cortisol in the serum. Moreover, the addition of zinc and copper in the diet not only increased the concentration of corresponding trace elements in the serum, but also affected the concentration of other trace elements in the serum. The reduction of copper and zinc content in the diet contributed to reducing the copper and zinc content in feces. In conclusion, we have formulated the mutual benefit dosages of copper and zinc (9?15 kg: 5 mg/kg Cu and 50 mg/kg Zn; 15?25 kg: 4 mg/kg Cu and 50 mg/kg Zn; 25?60 kg: 4 mg/kg Cu and 10 mg/kg Zn) for weaning piglets and growing pigs, which would help ensure the healthy growth of animals and reduce environmental heavy metal residues. Capsule: This study developed a mutually beneficial dose of copper and zinc in pig diets, which promotes animal growth and protects the environment.