摘要
Five finishing trials and an economic analysis were conducted to optimize corn use by feedlot cattle through corn processing and wet corn milling by-products. Data are available for feeding dry-rolled corn with by-products such as wet corn gluten feed (WCGF), steep liquor, corn bran, and germ meal to finishing cattle. However, limited data are available for feeding these by-products with more intensively processed corn. Our objectives were to determine the effects of by-products fed in finishing diets that contained corn that was processed more intensively than rolled corn, energy values of processed corn, and cost of processing. Processing corn in finishing diets that contained 25% WCGF (DM basis) improved calculated net energy for gain estimates for fine-ground (5.1%), rolled high-moisture (10.3%), ground high-moisture (10.9%), and steam-flaked corn (15.4%) compared to dry-rolled corn. Feeding WCGF at levels of 10, 20, 25, 30, and 35% (DM basis) in steam-flaked corn based diets did not affect average daily gain or feed efficiency compared to 0% inclusion of WCGF. Wet corn gluten feed is mostly a combination of steep liquor and corn bran. Higher ratios of steep to bran in WCGF increased feed efficiency when by-products were fed at 25% of diet DM in steam-flaked corn based diets. Drying corn bran did not affect its energy value. Feeding by-products with more intensively processed corn appears to be a viable option in feeding finishing cattle. To determine if this is the case, cost of processing corn more intensively must be know. Corn processing costs were estimated to be between $0.81 and $1.58 per t for dry rolling, $3.07 and $4.71 per t for ensiling high-moisture, and $6.23 and $9.57 per t for steam-flaking corn. Using these estimated costs, feeding WCGF with intensively processed corn can have economic benefits.
摘要译文
五完成试验和经济分析进行了副产品通过玉米加工和湿法谷物磨制，以优化通过育肥牛玉米用量。数据可用于喂养干燥轧玉米副产物，如湿玉米蛋白饲料（WCGF），浆，玉米麸和胚芽粕整理牛。然而，有限的数据可用于喂养这些副产品有更多的深加工玉米。我们的目标是确定的影响的副产物在精加工日粮含有玉米已处理更密集比轧制玉米，加工玉米的能量值，和处理的成本进料。在整理的饮食含有25％25 WCGF（干物质为基础）为提高增益估计为细磨（5.1％25）计算的净能量处理玉米，热轧高水分（10.3％25），地面高水分（10.9％25），和蒸汽压片玉米（15.4％25）相比，进行干轧制玉米。喂养WCGF在10，20，25，30，和35％25（干物质基础）中蒸汽压片玉米基础日粮没有影响平均日增重或饲料效率相比0％25包容WCGF的水平。湿玉米蛋白饲料主要是浆和玉米皮的组合。较高的比率在急剧向WCGF麸皮提高饲料转化效率，当副产品均在饮食DM的25％在25蒸汽压片玉米为原料的饲料喂养。干燥的玉米麸没有影响它的能量值。副产品有更多的深加工玉米喂养似乎是在整理喂养牛的一个可行的选择。以确定是否是这种情况，处理玉米成本更集中，必须知道的。玉米加工费用估计将介于0.81美元美元和1.58吨干法辊压，3.07美元和4.71美元每吨青贮为高水分，并6.23美元和9.57美元每吨蒸汽剥落的玉米。使用这些估计的成本，饲养与WCGF深加工玉米可以有经济效益。
Macken, Casey N. Optimizing corn use by finishing cattle through wet corn milling by-products and corn processing[D]. US: The University of Nebraska - Lincoln, 2003