We conducted two feeding experiments to evaluate the effects of supplementation with either cellooligosaccharide or kraft pulp on growth performance in grazing beef calves (Japanese Black) from 4 weeks pre-weaning to 12 to 16 weeks post-weaning. In Experiment 1 (20-week duration), nine calves (2.9-month-old females) were assigned to either a control group (CON) or an experimental group (CEL) fed cellooligosaccharide at a rate of 10 g/day mixed with concentrate. Average daily weight gain tended to be greater in CEL than in CON, especially after 1 month of weaning. In Experiment 2 (16-week duration), 10 calves (2.0-month-old females) were assigned to either a control group or an experimental group (KRA) fed kraft pulp at a rate of 10% replacement of total digestible nutrients with concentrate. The proportion of fibrolytic bacteria increased and that of methanogenic Archaea decreased in the rumen microbial community composition of KRA calves in Experiment 2, whereas the decrease in Fibrobacter and Archaea was observed in CEL calves at first 4 weeks in Experiment 1. We conclude that beta-glucan prebiotic supplementation to grazing calves at pre-weaning would affect rumen microbial composition and modified rumen fermentation characteristics, leading to a better rumen environment via different means.

中文翻译：

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在牧场的断奶前至断奶后期间，向犊牛提供β-葡聚糖益生元（纤维寡糖和牛皮纸浆）。

我们进行了两次喂养实验，以评估从断奶前4周至断奶后12至16周补充纤维寡糖或牛皮纸浆对放牧牛肉犊（日本黑）的生长性能的影响。在实验1（持续20周）中，将9头小牛（2.9个月大的雌性）分配给对照组（CON）或实验组（CEL），以每天10克的速度加入纤维寡糖并与浓缩液混合。CEL的平均日增重往往比CON的大，尤其是在断奶1个月后。在实验2（持续16周）中，将10头小牛（2.0个月大的雌性）分配给对照组或实验组（KRA）喂牛皮纸浆，以浓缩液替代总可消化营养素的10％ 。