Department of Bioresources, Mie University, Tsu, Mie, Japan.
Department of Nutrition and Feed Technology, Faculty of Animal Science, IPB University, Bogor, West Java, Indonesia.
Anim Sci J. 2024 Jan-Dec;95(1):e14000. doi: 10.1111/asj.14000.
The objectives of this study were to evaluate the nutritional characteristics of bakery by-products (castella, pancake, baumkuchen) and their effect on rumen fermentation in vitro as compared with steam-flaked corn and barley as human-edible grains. The fermentation pattern of sugar and starch as pure components was also investigated. Additionally, rumen pH was evaluated using a low-capacity buffer. Bakery by-products contained high sugar (212-590 g/kg DM) and starch (262-545 g/kg DM). Castella exhibited the highest sugar content, whereas pancake and baumkuchen were rich in starch and ether extract within bakery by-products, respectively. The gas production rate at the early phase of incubation was higher in bakery by-products than in grains, and the highest in castella among all feeds. Bakery by-products produced higher total organic acids and propionate than grains. Bakery by-products also exhibited a lower rumen pH than grains during twenty-four hours of incubation with a low-capacity buffer. As pure components, sucrose showed a higher gas production rate and lower pH than starch. Overall, compared with grains, bakery by-products have the potential not only to supply more energy to ruminants but also decrease rumen pH because sugar and starch in bakery by-products ferment rapidly and produce higher organic acids in the rumen.
本研究旨在评估面包店副产品（castella、薄煎饼、年轮蛋糕）的营养特性，并将其与可食用谷物的蒸汽压片玉米和大麦进行比较，评估其在体外瘤胃发酵中的效果。还研究了糖和淀粉作为纯成分的发酵模式。此外，还使用低容量缓冲液评估了瘤胃液 pH 值。面包店副产品含有高糖（212-590g/kg DM）和淀粉（262-545g/kg DM）。castella 的糖含量最高，而薄煎饼和年轮蛋糕分别是面包店副产品中淀粉和乙醚提取物含量最丰富的。在培养的早期阶段，面包店副产品的产气量高于谷物，其中 castella 的产气量最高。与谷物相比，面包店副产品在培养 24 小时内产生的总有机酸和丙酸更多。与谷物相比，在 24 小时的培养过程中，低容量缓冲液的使用使面包店副产品的瘤胃液 pH 值也低于谷物。作为纯成分，蔗糖的产气量高于淀粉，pH 值低于淀粉。总体而言，与谷物相比，面包店副产品不仅具有为反刍动物提供更多能量的潜力，而且由于面包店副产品中的糖和淀粉快速发酵并在瘤胃中产生更高的有机酸，还具有降低瘤胃液 pH 值的潜力。
