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.

中文翻译：

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菠萝茎淀粉饲喂对育肥牛瘤胃微生物发酵、血脂谱和生长性能的影响

在为期 206 天的饲喂研究中，根据 36 头阉牛的生长性能、血液概况和瘤胃参数，评估了菠萝茎淀粉 (PS) 作为新型淀粉来源的适用性。PS 被配制成 40% 的浓缩物并与草料一起饲喂，与相同水平配制的玉米粉 (GC) 和木薯粉 (CA) 相比。PS 饲喂提高了增重和饲料转化率，而不影响采食量。在整个实验过程中，PS 并未明显影响血脂水平。在整个喂养研究中，瘤胃总短链脂肪酸 (SCFA) 的浓度随着 PS 的增加而增加，而不影响 SCFA 的组成。瘤胃淀粉分解菌群，尤其是瘤胃溴化球菌，在瘤胃微生物群落中占主导地位，并且在整个实验过程中通过 PS 喂养显示丰度增加。这些结果清楚地表明 PS 在瘤胃发酵和生长性能方面作为育肥牛的有用淀粉来源的潜力。