Department of Animal Science, Macdonald Campus, McGill University, Sainte-Anne-De-Bellevue, Quebec, H9X 3V9, Canada.
J Dairy Sci. 2010 Feb;93(2):733-6. doi: 10.3168/jds.2009-2478.
Fifteen multiparous Holstein cows were used in a 3 x 3 Latin square experiment to determine the effects of feeding pearl millet grain on feed intake, milk yield, and milk composition of lactating dairy cows. Three isonitrogenous diets with a 57:43 forage:concentrate ratio were formulated. Diets contained 30% corn, 30% pearl millet, or 31% corn and pearl millet mixed 1:1 (wt/wt). Three lactating Holstein cows fitted with ruminal cannulas were used to determine the effects of dietary treatments on ruminal fermentation parameters. Dry matter intake and energy-corrected milk were similar for all dietary treatments and averaged 23.8 and 33.5 kg/d, respectively. Dry matter intake (% of BW) was unaffected by dietary treatments and averaged 3.40%. Milk fat, protein, lactose, and total solids concentrations were not influenced by grain type. Ruminal NH(3)-N concentration was unaffected by dietary treatments. However, ruminal pH tended to be lower for cows fed pearl millet than those fed corn and pearl millet mix. It was concluded that pearl millet grain can replace corn in dairy cow diets up to 30% of the diet DM with no adverse effects on milk yield or milk composition.
15 头经产荷斯坦奶牛采用 3x3 拉丁方试验设计，以确定饲喂珍珠粟对泌乳奶牛采食量、产奶量和乳成分的影响。配制了 3 种等氮饲粮，饲粮中粗饲料与精料比例为 57:43。饲粮中分别含有 30%的玉米、30%的珍珠粟或 31%的玉米与珍珠粟等比例（重量/重量）混合。通过 3 头安装瘤胃瘘管的泌乳荷斯坦奶牛，测定饲粮处理对瘤胃发酵参数的影响。所有饲粮处理的干物质采食量和能量校正乳产量相似，分别为 23.8kg/d 和 33.5kg/d。干物质采食量（占体重的百分比）不受饲粮处理的影响，平均为 3.40%。乳脂、乳蛋白、乳糖和总固形物浓度不受谷物类型的影响。瘤胃 NH3-N 浓度不受饲粮处理的影响。然而，饲喂珍珠粟的奶牛瘤胃 pH 值往往低于饲喂玉米和玉米与珍珠粟混合的奶牛。结论是，在奶牛饲粮中，珍珠粟可以替代高达 30%的玉米干物质，而对产奶量或乳成分没有不良影响。
