育肥肉牛——盈利的关键

Finishing cattle-Keys to profitability

高能日粮可以提高动物的生产性能、胴体品质和多数市场下的经济回报。谷物饲料经适当加工后,可以为肉牛提供更多的可消化淀粉,成为最经济的能量来源。日粮能量是动物生产性能的主要营养驱动力,因此典型高谷物日粮的有效利用使得动物的单位增重成本最低。油脂是不能在瘤胃中发酵的高能饲料,它可以提高日粮能量密度,但不会导致类似于饲喂高淀粉日粮带来的消化风险。如果情况允许,也可以考虑其他能量副产品。比较多种饲料的营养价值时,如果单纯的比较饲料能量含量差异(如比例、百分比的差异),往往会低估它们经济价值的差异。最好的方法是基于它们在生产性能和增重成本方面的潜在影响进行评估。

High energy finishing diets can improve animal performance,carcass quality,and in many markets,economic returns. When properly processed,grains provide highly digestible starch and are often the cheapest source of energy. As dietary energy is the primary nutritional driver of animal performance,high grain diets are typically used most efficiently,thereby resulting in the lowest cost per unit of gain. Oils are energy dense ingredients that are not fermented in the rumen,so can increase dietary energy density without contributing to some of the digestive challenges associated with high starch diets. Other high energy( bi-) products should be considered when available. When comparing ingredient values,simple comparisons of energy content( ie ratios,percentage difference) often underestimate differences in economic value. Value of ingredients are best determined based on their predicted impacts on performance and cost of gain.