Hidiroglou H, Ivan M, Jenkins K J
J Dairy Sci. 1977 Dec;60(12):1905-9. doi: 10.3168/jds.S0022-0302(77)84122-2.
Sixteen pregnant Shorthorn cows were winter-fed either oat or barley silage, both of which were low in selenium (less than .1 ppm). Two months before calving, as well as at calving and a month later, four cows on each diet were given intramuscularly a preparation containing 1360 IU of vitamin E and 30 mg selenium as sodium selenite. Barley silage lipids contained higher linoleic (33.2 versus 22.3%) and palmitic acids (32.3 versus 23.1%), and lower oleic (6.3 versus 22.1%) and linolenic acids (20.9 versus 30.9%) than oat silage. Three calves born from the untreated dams on barley silage died from nutritional muscular dystrophy by 50 days of age whereas none of the calves either from the untreated cows on oat silage or from any of the selenium/vitamin E treated cows. Milk from untreated cows fed barley silage contained a higher proportion of linoleic acid than that from treated cows or from those on oat silage. The incidence of nutritional muscular dystrophy was associated closely with ingestion by the calves of an increased amount of dietary dienoic acid. It appears an advantage to include oat silage in winter feeding programs for beef cows to reduce the risk of development of nutritional muscular dystrophy in the offspring.
16头怀孕的短角奶牛在冬季以燕麦青贮饲料或大麦青贮饲料为食，这两种青贮饲料的硒含量都很低（低于0.1 ppm）。在产犊前两个月以及产犊时和产犊后一个月，每种日粮组中的4头奶牛被肌肉注射一种制剂，该制剂含有1360国际单位的维生素E和30毫克作为亚硒酸钠的硒。与燕麦青贮饲料相比，大麦青贮饲料的脂质含有更高的亚油酸（33.2%对22.3%）和棕榈酸（32.3%对23.1%），以及更低的油酸（6.3%对22.1%）和亚麻酸（20.9%对30.9%）。来自以大麦青贮饲料为食的未处理母牛的3头犊牛在50日龄前死于营养性肌肉萎缩症，而来自以燕麦青贮饲料为食的未处理母牛或任何接受硒/维生素E处理的母牛的犊牛均未出现这种情况。以大麦青贮饲料为食的未处理母牛的牛奶中亚油酸比例高于接受处理的母牛或食用燕麦青贮饲料的母牛的牛奶。营养性肌肉萎缩症的发病率与犊牛摄入增加量的膳食二烯酸密切相关。在肉牛冬季饲养计划中加入燕麦青贮饲料似乎有利于降低后代患营养性肌肉萎缩症的风险。
