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首页> 外文期刊>African Journal of Biotechnology >Effects of different doses of melamine in the diet on melamine concentrations in milk, plasma, rumen fluid, urine and feces in lactating dairy cows
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Effects of different doses of melamine in the diet on melamine concentrations in milk, plasma, rumen fluid, urine and feces in lactating dairy cows

机译：日粮中不同剂量三聚氰胺对奶牛泌乳，血浆，瘤胃液，尿液和粪便中三聚氰胺含量的影响

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摘要

The objectives of this paper were to evaluate the effects of feeding diets containing different levels of melamine on melamine concentrations in milk, plasma, rumen fluid, urine and feces in Holstein dairy cows. Sixteen Chinese Holstein dairy cows fixed with permanent ruminal cannulas were assigned to 1 of 4 treatments within a completely randomized design for 10 days. Cows were fed different amounts of melamine {20 (group 1), 40 (group 2), 60 (group 3) or 80 (group 4) g/day/cow} once daily in the morning mixed with a melamine free basal diet for 7-days adaptation followed by 3-days urine and feces sample collections. Melamine was found in all samples tested and its concentration generally increased as dose increased in the diet. These results indicated that different doses of melamine in the diet could result in different concentrations of melamine in milk, plasma, rumen fluid, urine and feces. Data suggested that melamine primarily cleared by urinary excretion, followed by fecal excretion in lactating dairy cows. Mammary tissue was apparently not a major tissue to dispose melamine, especially when fed a relatively low dose (lower than 40 g/day/cow).
机译：本文的目的是评估饲喂不同三聚氰胺含量的日粮对荷斯坦奶牛的牛奶，血浆，瘤胃液，尿液和粪便中三聚氰胺含量的影响。在完全随机设计下，将16头固定有永久性瘤胃插管的中国荷斯坦奶牛进行了4种处理中的1种，为期10天。每天早上给母牛喂不同量的三聚氰胺{20（第1组），40（第2组），60（第3组）或80（第4组）g /天/牛）与无三聚氰胺的基础饮食混合适应7天，然后收集3天尿液和粪便。在所有测试样品中均发现三聚氰胺，其浓度通常随着日粮中剂量的增加而增加。这些结果表明，饮食中不同剂量的三聚氰胺可能导致牛奶，血浆，瘤胃液，尿液和粪便中三聚氰胺的浓度不同。数据表明，三聚氰胺主要通过泌尿排泄清除，然后在泌乳奶牛中通过粪便排泄清除。乳腺组织显然不是处置三聚氰胺的主要组织，尤其是当饲喂相对较低剂量（低于40克/天/牛）时。

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