摘要
The present study was conducted to examine the effect of soybean silage as a crude protein supplement for corn silage in the diet of Hanwoo steers. The first experiment was conducted to evaluate the effect of replacing corn silage with soybean silage at different levels on rumen fermentation characteristics in vitro. Commercially-purchased corn silage was replaced with 0, 4, 8, or 12% of soybean silage. Half gram of the substrate was added to 50 mL of buffer and rumen fluid from Hanwoo cows, and then incubated at 39℃ for 0, 3, 6, 12, 24, and 48 h. At 24 h, the pH of the control (corn silage only) was lower (p<0.05) than that of soybean-supplemented silages, and the pH numerically increased along with increasing proportions of soybean silage. Other rumen parameters, including gas production, ammonia nitrogen, and total volatile fatty acids, were variable. However, they tended to increase with increasing proportions of soybean silage. In the second experiment, 60 Hanwoo steers were allocated to one of three dietary treatments, namely, CON (concentrate with Italian ryegrass), CS (concentrate with corn silage), CS4% (concentrate with corn silage and 4% of soybean silage). Animals were offered experimental diets for 110 days during the growing period and then finished with typified beef diets that were commercially available to evaluate the effect of soybean silage on animal performance and meat quality. With the soybean silage, the weight gain and feed efficiency of the animal were more significant than those of the other treatments during the growing period (p<0.05). However, the dietary treatments had little effect on meat quality except for meat color. In conclusion, corn silage mixed with soybean silage even at a lower level provided a greater ruminal environment and animal performances, particularly with increased carcass weight and feed efficiency during growing period.
摘要译文
进行了本研究以检查大豆青贮饲料作为汉沃牛皮饮食中玉米青贮饲料的粗蛋白补充剂的作用。进行了第一个实验，以评估用不同水平的大豆青贮饲料代替玉米青贮饲料对体外瘤胃发酵特征的影响。以0、4、8或12％的大豆青贮饲料代替了商业上购买的玉米青贮饲料。将底物的一半克添加到Hanwoo母牛的50 mL缓冲液和瘤胃液中，然后在39°孵育0、3、6、12、24和48 h中孵育。在24小时内，对照（仅玉米青贮饲料）的pH值（p <0.05）比大豆补充的青贮饲料的pH值低（p <0.05），并且pH值随着大豆青贮饲料比例的增加而增加。其他瘤胃参数，包括气体产生，氮和总挥发性脂肪酸，都是可变的。但是，随着大豆青贮饲料比例的增加，它们倾向于增加。在第二次实验中，将60个hanwoo转向分配给了三种饮食治疗之一，即con（浓缩意大利黑麦草），CS（浓缩玉米灰青块），CS4％（玉米卷浓缩含量和4％的大豆青贮饲料）。在生长期间，向动物提供了110天的实验饮食，然后以商业上可用的典型牛肉饮食结束，以评估大豆青贮饲料对动物性能和肉质质量的影响。借助大豆青贮饲料，动物的体重增加和饲料效率比生长期间其他疗法的重量更为重要（p <0.05）。但是，饮食疗法对肉类质量的影响很小，除了肉类颜色。总之，即使在较低水平，玉米青贮饲料与大豆青贮饲料混合在一起，提供了更大的瘤胃环境和动物性能，尤其是在生长期间尸体体重和饲料效率提高的情况下。
Kang; Juhui;Lee; Kihwan;Marbun; Tabita Dameria;Song; Jaeyong;Kwon; Chan Ho;Yoon; Duhak;Seo; Jin-Dong;Jo; Young Min;Kim; Jin Yeoul;Kim; Eun Joong;. Effect of Corn Silage and Soybean Silage Mixture on Rumen Fermentation Characteristics In Vitro, and Growth Performance and Meat Grade of Hanwoo Steers[J]. Journal of The Korean Society of Grassland and Forage Science, 2022,42(2): 61-72