A comparative trial was conducted in which three kinds of functional alfalfa hays (which consists of selenium rich type, selenium-cobalt rich type and selenium-cobalt-zinc rich type and common type ) were applied to Holstein Cow and sheep diet in order to analyse their regulation and effects on the feed conversion and characteristics of animal production. The results showed that compared to common type alfalfa hay , three kinds of functional alfalfa hays could enhance forage conversion efficiency when supplemented with 5% in animal diets. Alfalfa hays (selenium-cobalt rich type and selenium-cobalt-zinc rich type )could raise daily gain of Holstein cow and Dopper sheep, nevertheless, alfalfa hays (selenium rich type)could enhance milk production of Holstein Cow. In animal production, functional alfalfa hays should be applied into diets of sheep and cow scientifically in'order to produce different animal products with good qualities.%通过在荷斯坦奶牛和杜泊羊日粮中添加5%高硒型、高硒钴型、高硒钴锌苜蓿青干草,研究3种苜蓿青干草对牛羊饲料转化和生产特点的影响.结果表明,功能型苜蓿青干草能够显著提高牛羊的饲料转化率,其中高硒钴和高硒钴锌苜蓿青干草有利于提高羊和牛的日增重,而高硒型青干草有利于提高荷斯坦奶牛的产奶量.
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