Biological Trace Element Research ( IF 3.9 ) Pub Date : 2020-06-02 , DOI: 10.1007/s12011-020-02197-6 Petra Wolf 1 , Maria Grazia Cappai 2
The assessment of heavy metals in feeds for food-producing animals is of particular importance both for animal and human health. Single feeds can be mixed and offered to animals either crushed or pelleted, and it would be recommendable to assess heavy metal content before mixing. A total of 408 feed samples for poultry were sent to our laboratory by farmers and feed manufacturers from Germany. Single feeding stuffs (cereals and legume seeds, n = 109 and n = 86, respectively) and compound mixed feeds for laying hens (n = 63), broilers (n = 83) and turkeys (n = 67) in the years 2015 to 2018 were processed for Pb and Cd content. Analyses pointed to the lowest Pb contents in cereal feeds (0.031 and 0.101 mg/kg feed). In compound feeds, values ranged between 0.089 (broilers) and 0.181 mg/kg on an as fed basis (laying hens). The highest Pb content of 0.358 mg/kg (as fed) was determined in one sample of mixed feed for turkeys. Cd levels in cereal feeds and compound feeds were similar; Cd in legume seeds turned out to be slightly higher (0.089 mg/kg feed). Results point to differences between cereals and legume seeds as single feeds; however, safe levels were found for both, as well as for compound feeds, below the maximum permitted for Pb 10 mg/kg and Cd 1 mg/kg in feed dry matter (88%).
中文翻译:
家禽单一饲料和复合饲料中铅和镉的含量。
食用动物饲料中重金属的评估对动物和人类健康都特别重要。可以混合单一饲料,然后将其粉碎或制成颗粒提供给动物,建议在混合前评估重金属含量。来自德国的农民和饲料生产商总共将408份家禽饲料样品发送到我们的实验室。单一饲料(谷物和豆科植物种子,Ñ = 109和Ñ 分别= 86)和用于产蛋鸡(化合物混合饲料Ñ = 63),肉鸡(Ñ = 83)和火鸡(Ñ = 67)在2015年至2018年期间处理了铅和镉的含量。分析指出谷物饲料中的铅含量最低(0.031和0.101 mg / kg饲料)。在复合饲料中,以饲喂量(蛋鸡)计,该值介于0.089(肉鸡)和0.181 mg / kg之间。在一份火鸡混合饲料样品中测定的最高Pb含量为0.358 mg / kg(按饲料)。谷物饲料和复合饲料中的镉含量相似;豆类种子中的镉含量略高(0.089 mg / kg饲料)。结果表明谷物和豆类种子作为单一饲料存在差异。但是,无论是配合饲料还是复合饲料,都发现其安全水平低于饲料干物质中铅10 mg / kg和镉1 mg / kg的最高允许限量(88%)。