Schroeder T L, Voelker H H, Schingoethe D J
J Dairy Sci. 1979 Dec;62(12):1889-94. doi: 10.3168/jds.S0022-0302(79)83519-5.
Spear, a high protein oat variety, was evaluated during 2 consecutive yr for yields of forage dry matter and for feeding value as a silage to heifers, steers, and lactating cows. In yr 1 and 2, Spear yielded 7% and 13% less forage dry matter per hectare than Burnett, a comparative oat variety. Crude protein contents in silages were similar for varieties both years. In yr 1, Holstein heifers fed high protein and medium protein oat silages gained the same amount of weight but less weight than heifers fed alfalfa-brome hay. In a total collection digestion trial with six lactating cows, digestibilities of Spear were less than Burnett oat silage or alfalfa-brome hay. In yr 2, Spear and Burnett silages were fed ad libitum without a concentrate mixture to seven Holstein heifers each. Average daily gains were higher with Spear than Burnett. Apparent digestibilities as determined with steers tended to be less for Spear than Burnett. Dry matter intakes, milk yield, and composition were similar in a switchback lactation trial with ten cows fed spear or Burnett in oat silage supplemented with a concentrate at 1 kg per 3 kg milk produced.
斯皮尔是一种高蛋白燕麦品种，连续两年对其饲草干物质产量以及作为青贮饲料对小母牛、阉牛和泌乳奶牛的饲喂价值进行了评估。在第1年和第2年，斯皮尔每公顷的饲草干物质产量比对照燕麦品种伯内特分别低7%和13%。两年中，两个品种青贮饲料的粗蛋白含量相似。在第1年，饲喂高蛋白和中蛋白燕麦青贮饲料的荷斯坦小母牛增重相同，但比饲喂苜蓿-雀麦干草的小母牛增重少。在一项对6头泌乳奶牛进行的全收粪消化试验中，斯皮尔的消化率低于伯内特燕麦青贮饲料或苜蓿-雀麦干草。在第2年，将斯皮尔和伯内特青贮饲料随意喂给每组7头荷斯坦小母牛，不添加精料混合物。斯皮尔组的平均日增重高于伯内特组。用阉牛测定的斯皮尔表观消化率往往低于伯内特。在一项折返泌乳试验中，给10头奶牛饲喂添加精料（每产3千克牛奶添加1千克）的斯皮尔或伯内特燕麦青贮饲料，干物质采食量、产奶量和乳成分相似。
