Abstract To effectively use corn by-products for ruminants, lactation performance, nitrogen utilization, and profitability in lactating dairy cows fed fermented total mixed ration (FTMR) that contained wet corn gluten feed (WCGF) and corn stover in combination replacing a portion of alfalfa hay were studied. Thirty-six multiparous Holstein dairy cows (602 ± 46.8 kg of body weight; 109 ± 18.5 day in milk; 30.1 ± 1.53 kg of milk production; and 2.44 ± 0. 51 of parity; mean ± SD) were blocked into 12 groups based on DIM, milk production, and parity and were allocated randomly to 1 of 3 diets for a 14-week period, with the first 2 weeks allowed for adaptation to the diets. The TMR was prepared with same mixed ration of concentrate mixtures and corn silage but different proportions of alfalfa hay, corn stover and WCGF. The treatments were designed as (1) TMR A containing 220 g/kg DM alfalfa hay; (2) TMR B containing 118 g/kg DM alfalfa hay, 68.8 g/kg DM WCGF, and 34.4 g/kg DM corn stover; and (3) Fermented TMR (FTMR) prepared with same ingredient as TMR B. The FTMR diet had higher crude protein (CP) and lactic acid contents content, the ratio of ammonia nitrogen to total N while decreased pH value, neutral detergent fiber (NDF), acid detergent fiber (ADF) and dry matter (DM) content compared to other two diets. The milk fat concentration, milk fat yield, DM and CP degradation, estimated microbial CP yield and feed efficiency were higher (P

中文翻译：

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饲喂含有湿玉米蛋白饲料和玉米秸秆的发酵全混合日粮替代部分苜蓿干草的奶牛的泌乳性能、氮利用和盈利能力

摘要 为了有效地将玉米副产品用于反刍动物、泌乳性能、氮利用和泌乳奶牛的盈利能力，饲喂含有湿玉米蛋白饲料 (WCGF) 和玉米秸秆的发酵全混合日粮 (FTMR)，替代部分苜蓿。干草进行了研究。36 头经产荷斯坦奶牛（体重 602 ± 46.8 kg；产奶量为 109 ± 18.5 天；产奶量为 30.1 ± 1.53 kg；胎次为 2.44 ± 0. 51；平均值 ± SD）被分为 12 组在 DIM、产奶量和胎次上，随机分配到 3 种饮食中的一种，为期 14 周，前 2 周允许适应饮食。TMR 是用相同比例的浓缩混合物和玉米青贮饲料制备的，但苜蓿干草、玉米秸秆和 WCGF 的比例不同。处理设计为(1) TMR A 含有220 g/kg DM 苜蓿干草；(2) TMR B含有118 g/kg DM苜蓿干草、68.8 g/kg DM WCGF和34.4 g/kg DM玉米秸秆；(3) 发酵TMR (FTMR) 与TMR B 相同成分制备。FTMR 日粮具有较高的粗蛋白(CP) 和乳酸含量、氨氮与总N 的比率而降低pH 值、中性洗涤纤维( NDF)、酸性洗涤纤维 (ADF) 和干物质 (DM) 含量与其他两种饮食相比。乳脂浓度、乳脂产量、DM 和 CP 降解、估计微生物 CP 产量和饲料效率较高（P FTMR日粮具有较高的粗蛋白（CP）和乳酸含量、氨氮与总N的比值，同时降低pH值、中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）和干物质（DM）含量到其他两种饮食。乳脂浓度、乳脂产量、DM 和 CP 降解、估计微生物 CP 产量和饲料效率较高（P FTMR日粮具有较高的粗蛋白（CP）和乳酸含量、氨氮与总N的比值，而pH值、中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）和干物质（DM）含量相比到其他两种饮食。乳脂浓度、乳脂产量、DM 和 CP 降解、估计微生物 CP 产量和饲料效率较高（P