The effects of different barley grain preservation techniques on intake, growth and carcase traits of dairy bulls were determined in a feeding trial using 52 Holstein and 48 Nordic Red bulls which were allotted to four feeding treatments (five pens and 25 bulls per treatment). Spring barley was harvested with a conventional combine harvester and four different preservation techniques formed the four experimental treatments. Dry grain (DG) was dried to the targeted dry matter (DM) concentration of 870–880 g/kg and rolled within 7 days prior to feeding. High moisture grain treated with a formic acid-based additive (FA) was harvested and crimped on the targeted DM content of 700 g/kg. Low moisture grain treated with a urea-based additive (UR) and low moisture grain treated with a propionic acid-based additive (PA) were harvested and crimped on the targeted DM content of 800 g/kg. The bulls were fed with total mixed ration ad libitum. On DM basis, the diets included grass silage (500 g/kg), barley grain (485 g/kg) and a mineral–vitamin mixture (15 g/kg). Daily DM intake (DMI) and live weight gain were 6% higher when crimped grains were used instead of DG (P < 0.05). There were no observed significant differences in DMI, gain or carcase traits between high moisture and low moisture crimped grain treatments or between UR and PA. The current results show that producers have the option to vary grain preservation system without major changes to growth performance or carcase traits.

中文翻译：

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不同大麦粒保存技术对饲喂草青贮日粮的育肥公牛采食量、生长和胴体性状的影响

不同大麦粒保存技术对奶牛采食量、生长和胴体性状的影响在一项饲喂试验中确定，该试验使用 52 头荷斯坦公牛和 48 头北欧红公牛，分配给四个饲喂处理（每个处理 5 个围栏和 25 头公牛）。春大麦是用传统的联合收割机收割的，四种不同的保存技术形成了四种实验处理。将干粮 (DG) 干燥至目标干物质 (DM) 浓度为 870-880 g/kg，并在喂食前 7 天内滚动。收获用甲酸基添加剂 (FA) 处理的高水分谷物，并在 700 g/kg 的目标 DM 含量上卷曲。收获经尿素基添加剂 (UR) 处理的低水分谷物和经丙酸基添加剂 (PA) 处理的低水分谷物，并在 800 g/kg 的目标 DM 含量上卷曲。公牛用全混合日粮喂养随意. 在干物质的基础上，日粮包括青贮饲料（500 g/kg）、大麦粒（485 g/kg）和矿物质-维生素混合物（15 g/kg）。当使用卷曲谷物代替 DG 时，每日 DM 摄入量 (DMI) 和活体重增加 6% (磷< 0.05)。在高水分和低水分卷曲谷物处理之间或在 UR 和 PA 之间，没有观察到 DMI、增重或胴体性状的显着差异。目前的结果表明，生产者可以选择改变谷物保存系统，而不会对生长性能或胴体性状进行重大改变。