Gerloff B J
Seneca Bovine Services, Marengo, IL 60152.
J Anim Sci. 1992 Dec;70(12):3934-40. doi: 10.2527/1992.70123934x.
The adequacy of current supplemental dietary selenium allowances for dairy cattle has been reviewed from the literature and by monitoring responses of dairy herds in a veterinary practice specializing in nutritional consultation. Both information sources tend to agree that a reference range of 70 to 100 ng of Se/mL of serum is an acceptable target concentration. This range can be attained most often by providing > 6 mg of supplemental Se.animal-1.d-1, but several factors affect the serum Se responses of different cows to specific Se intakes. These factors may include forage types and sources, ruminal environment, supplemental fat, dietary calcium, trace metals, and genetics. The major benefits, observed experimentally, of maintaining optimal Se intakes include minimizing the incidence of mastitis and preventing calf losses associated with myopathy and(or) respiratory disease.
通过查阅文献以及监测一家专门从事营养咨询的兽医诊所中奶牛群的反应，对当前奶牛日粮中硒补充量的充足性进行了评估。这两种信息来源都倾向于认为，血清硒浓度70至100 ng/mL的参考范围是可接受的目标浓度。这个范围通常可以通过每头动物每天提供>6 mg的补充硒来实现，但有几个因素会影响不同奶牛对特定硒摄入量的血清硒反应。这些因素可能包括饲草类型和来源、瘤胃环境、补充脂肪、日粮钙、微量金属和遗传因素。通过实验观察到，保持最佳硒摄入量的主要益处包括将乳腺炎的发病率降至最低，以及预防与肌病和（或）呼吸道疾病相关的犊牛损失。
