Department of Animal Science, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom, Thailand.
Graduate School of Agriculture, Hokkaido University, Sapporo, Japan.
Anim Sci J. 2020 Jan-Dec;91(1):e13459. doi: 10.1111/asj.13459.
Pineapple stem starch (PS) was evaluated for its suitability as a new starch source in concentrate for fattening cattle, based on the growth performance, blood profile, and rumen parameters of 36 steers in a 206-day feeding study. PS was formulated as a 40% concentrate and fed with forage in comparison with ground corn (GC) and ground cassava (CA) formulated at the same level. PS feeding improved weight gain and feed conversion ratio without affecting feed intake. PS did not obviously influence blood lipid profiles throughout the experiment. Ruminal concentration of total short-chain fatty acids (SCFA) increased with PS without affecting SCFA composition throughout the feeding study. Rumen amylolytic group, especially Ruminococcus bromii, was dominant in the rumen microbial community, and showed increased abundance by PS feeding throughout the experiment. These results clearly indicate the potential of PS as a useful starch source for fattening cattle in terms of rumen fermentation and growth performance.
菠萝渣淀粉（PS）作为浓缩饲料中一种新的淀粉来源，在一项为期 206 天的饲养研究中，基于 36 头育肥牛的生长性能、血液指标和瘤胃参数进行了评估。PS 被配制成 40%的浓缩饲料，并与草料一起与粉碎玉米（GC）和粉碎木薯（CA）进行对比，这些饲料都在同一水平下进行了配制。PS 喂养提高了增重和饲料转化率，而不影响采食量。PS 喂养在整个实验过程中对血脂谱没有明显影响。瘤胃中总短链脂肪酸（SCFA）的浓度随着 PS 的增加而增加，整个饲养研究过程中 SCFA 组成没有受到影响。瘤胃淀粉分解菌群，尤其是 Ruminococcus bromii，在瘤胃微生物群落中占主导地位，并且随着 PS 的喂养整个实验过程中丰度增加。这些结果清楚地表明 PS 作为一种有用的淀粉来源，在瘤胃发酵和生长性能方面具有潜力。
