摘要
The fuel ethanol industry is currently experiencing tremendous growth with production estimates in excess of 30 billion liters over the next decade. Byproducts from the production of fuel ethanol are distillers grains and condensed distillers solubles which are often mixed together to produce wet or dry distillers grains plus solubles. Past research has demonstrated that wet distillers grains plus solubles (WDGS) has a higher energy value relative to corn in finishing diets for feedlot cattle, which, along with an increasing supply, has made it an attractive feed ingredient. Six feeding trials and one economic analysis evaluated the use of distillers grains plus solubles in finishing diets. Feedlot cattle fed increasing dietary inclusions of WDGS demonstrated greatest feed efficiency at a 40% WDGS inclusion (DM basis). Wet distillers grains plus solubles returned more dollars per head than conventional high concentrate feeding. Dietary inclusions of WDGS that maximize return are between 30 and 40% of diet DM near the ethanol plant or up to 48 km from the plant while the economics favor dietary inclusions between 20 and 30% of diet DM between 48 and 161 km from the ethanol plant. Cattle fed dry distillers grains plus solubles (DDGS) supplemented with degradable intake protein (DIP) performed similar to cattle not supplemented with DIP. Cattle fed high-moisture corn based finishing diets with 30% WDGS had greater feed efficiencies than cattle fed corn processed by five other methods. Performance for cattle supplemented with corn oil were lower compared with cattle fed equal amounts of dietary fat provided from WDGS; however, cattle fed DDGS or tallow in finishing diets containing 20% wet corn gluten feed demonstrated similar finishing performance. Cattle fed WDGS demonstrated lower acetate: propionate ratios, greater fat digestibility, and more unsaturated fatty acids reaching the duodenum than cattle fed supplemental corn oil. These data demonstrate the effectiveness of distillers byproducts used in diets for feedlot cattle.
摘要译文
燃料乙醇产业正在经历与超过30十亿liters在未来十年产量预估巨大的增长。从生产燃料乙醇的副产品是酒糟和冷凝酒糟这往往混合在一起，以产生湿或干酒糟加可溶物。过去的研究表明，湿酒糟加可溶物（WDGS）具有相对更高的能量值，以玉米精饲料的育肥牛，其中，随着越来越多的供应，已成为一个有吸引力的饲料原料。六饲养试验和一个经济分析评估了酒糟加可溶的整理饮食。喂WDGS增加饮食中夹杂育肥牛表现出最大的饲料转化率在40％25 WDGS包容（干物质为基础）。湿酒糟加可溶返回更多的美元，每头比传统的高精料饲养。WDGS膳食夹杂最大化回报是饮食的DM邻近乙醇厂或至多从植物48公里而经济学青睐48和161公里之间从20饮食的DM和30％至25膳食夹杂物25在30和40％乙醇厂。牛喂干酒糟加可溶物（DDGS），辅以可降解蛋白质摄入（DIP）执行类似的不辅以DIP牛。牛饲喂高水分玉米基础日粮完成30％25 WDGS有更大的饲料效率比牛饲喂玉米其他五种方法进行处理。牛辅以玉米油性能的降低与牛饲喂WDGS从提供的膳食脂肪等量的比较;然而，牛饲喂DDGS或牛油整理日粮含20％湿25玉米蛋白饲料表现出类似的整理性能。牛喂养WDGS证实低醋酸：丙酸比，更大的脂肪消化率，而多种不饱和脂肪酸，在到达十二指肠比牛喂养补充玉米油。这些数据表明在饮食用于育肥牛蒸馏副产物的有效性。
Vander Pol, Kyle J. Factors associated with the utilization of distillers byproducts derived from the dry-milling process in finishing diets for feedlot cattle[D]. US: The University of Nebraska - Lincoln, 2006