Nayohan Sandi, Kasugai Daiki, Matamura Masaya, Nishikawa Yoshimasa, Barwani Didier Kichochi, Kondo Makoto
Department of Bioresources, Mie University, Tsu, Mie, Japan.
Aichi Prefecture Agricultural College, Okazaki, Aichi, Japan.
Anim Sci J. 2025 Jan-Dec;96(1):e70086. doi: 10.1111/asj.70086.
This study investigated the effect of partially replacing corn with castella by-product, a sugar-rich feedstuff, on the lactation performance and nutrient digestibility of dairy cows. Eleven late-lactating Holstein cows were used in the experiment employing a crossover design with two periods of 21 days, including 18 days of adaptation and 3 days of data collection, under group-feeding. Castella by-product was incorporated into the diet at 7% on a dry matter (DM) basis, which replaced 30% DM of the starch-rich grains used in the diet. The results showed that the inclusion of the castella increased the digestibilities of DM, organic matter, and neutral detergent fiber (p < 0.05) despite its high sugar content, while decreasing starch digestibility (p < 0.05), without affecting fecal pH, fecal DM, or microbial protein synthesis in the rumen (p > 0.05). The castella diet did not differ significantly from the corn diet for milk yield, milk composition, milk fatty acid profile, or microbial protein synthesis in the rumen (p > 0.05). In summary, the partial replacement of corn with castella by-product in the diet yielded comparable lactation performance outcomes to those of the control diet in dairy cows.
本研究调查了用卡仕达副产品（一种富含糖分的饲料原料）部分替代玉米对奶牛泌乳性能和养分消化率的影响。本实验采用交叉设计，选用11头处于泌乳后期的荷斯坦奶牛，分为两个阶段，每个阶段21天，包括18天的适应期和3天的数据收集期，采用群体饲养。卡仕达副产品以干物质（DM）计按7%的比例添加到日粮中，替代了日粮中30%DM的富含淀粉的谷物。结果表明，尽管卡仕达副产品含糖量高，但添加后提高了干物质、有机物和中性洗涤纤维的消化率（p<0.05），同时降低了淀粉消化率（p<0.05），且对粪便pH值、粪便干物质或瘤胃微生物蛋白合成没有影响（p>0.05）。在产奶量、牛奶成分、牛奶脂肪酸谱或瘤胃微生物蛋白合成方面，卡仕达副产品日粮与玉米日粮之间没有显著差异（p>0.05）。总之，日粮中用卡仕达副产品部分替代玉米，奶牛的泌乳性能结果与对照日粮相当。
