Krehbiel C R, Stock R A, Herold D W, Shain D H, Ham G A, Carulla J E
Department of Animal Science, University of Nebraska, Lincoln 68583-0908, USA.
J Anim Sci. 1995 Oct;73(10):2931-9. doi: 10.2527/1995.73102931x.
Two experiments were conducted to evaluate the effects of feeding wet corn gluten feed (WCGF) on subacute acidosis in cattle. In Exp. 1, 60 individually fed yearling steers (270 +/- 22 kg BW) were used in a 5 x 2 factorial arrangement of treatments. Steers were assigned to one of five dietary treatments: 1) dry-rolled corn (DRC), 2) 35% WCGF fed d 1 to 132, 3) 86.5% WCGF fed d 1 reduced to 35% WCGF by d 19 and increasing the proportion of DRC, 4) 86.5% WCGF fed d 1 to 132, or 5) 94.5% WCGF fed d 1 to 132. Final diets for Treatments 1 through 4 contained 92% concentrate and 8% alfalfa hay (DM basis). Treatment 5 was a 100% concentrate diet. All diets were fed with or without the addition of escape protein. During d 19 to 24, steers fed WCGF had less (P < .05) DMI variation than steers fed the control diet. Steers fed 86.5 and 94.5% WCGF had lower (P < .05) DMI and ADG than steers fed TReatments 1 through 3, although gain/feed was mot different (P > .10) In Exp. 2, three ruminally fistulated steers (615 +/- 36 kg BW) were used in a repeated 3 x 3 Latin square design. On d 14 of each period, 7.9 kg (DM) of 100% DRC, 50% DRC:50% WCGF, of 100% WCGF was intraruminally dosed as an acidosis challenge. Area within the curve below ruminal pH 6.0 was greater (P < .05) over a 24-h period for steers dosed with 100% DRC than for steers dosed with 50% DRC: 50% WCGF or 100% WCGF. In addition, more (P < .05) ruminal VFA accumulated over 24 h for steers dosed with 100% DRC. These data suggest that feeding WCGF does nor eliminate ruminal acidosis but may reduce the length of time cattle are exposed to the insult.
进行了两项试验以评估饲喂湿玉米麸质饲料（WCGF）对牛亚急性酸中毒的影响。在试验1中，60头单独饲养的一岁公牛（体重270±22千克）用于5×2析因处理安排。公牛被分配到五种日粮处理之一：1）干碾压玉米（DRC），2）第1天至132天饲喂35%WCGF，3）第1天饲喂86.5%WCGF，到第19天降至35%WCGF并增加DRC比例，4）第1天至132天饲喂86.5%WCGF，或5）第1天至132天饲喂94.5%WCGF。处理1至4的最终日粮含92%精料和8%苜蓿干草（干物质基础）。处理5是100%精料日粮。所有日粮在添加或不添加逃逸蛋白的情况下饲喂。在第19天至24天期间，饲喂WCGF的公牛的干物质采食量（DMI）变化小于饲喂对照日粮的公牛（P<0.05）。饲喂86.5%和94.5%WCGF的公牛的DMI和平均日增重（ADG）低于饲喂处理1至3的公牛（P<0.05），尽管料重比无差异（P>0.10）。在试验2中，三头瘤胃造瘘公牛（体重615±36千克）用于重复的3×3拉丁方设计。在每个周期的第14天，将7.9千克（干物质）的100%DRC、50%DRC:50%WCGF或100%WCGF经瘤胃内投给作为酸中毒挑战。在24小时期间，投给100%DRC的公牛瘤胃pH值低于6.0的曲线下面积大于投给50%DRC:50%WCGF或100%WCGF的公牛（P<0.05）。此外，投给100%DRC的公牛在24小时内瘤胃挥发性脂肪酸（VFA）积累更多（P<0.05）。这些数据表明，饲喂WCGF并不能消除瘤胃酸中毒，但可能会减少牛受到酸中毒影响的时间。
