Cherdthong Anusorn, Seankamsorn Anuthida, Suriyapha Chaichana, Chanjula Pin, Wanapat Metha
Department of Animal Science, Faculty of Agriculture, Tropical Feed Resources Research and Development Center (TROFREC), Khon Kaen University, Khon Kaen, Thailand.
Department of Animal Science, Faculty of Natural Resources, Prince of Songkla University, Songkhla, Thailand.
J Anim Physiol Anim Nutr (Berl). 2018 Dec;102(6):1509-1514. doi: 10.1111/jpn.12989. Epub 2018 Sep 20.
This study was conducted to evaluate the effect of ß-glucan on feed intake, digestibility of nutrients and ruminal fermentation in Thai native beef cattle that were fed low-quality roughage. Four, Thai native beef cattle with initial body weight (BW) of 100 ± 20.0 kg were randomly assigned according to a 4 × 4 Latin square design to receive four treatment by ß-glucan at 0, 1.6, 3.1 and 4.7 g/day respectively. Supplementation of ß-glucan at 0-4.7 g in cattle did not affect the intake of DM, OM, CP, NDF or ADF. However, supplementation with ß-glucan significantly improved rice straw intake (g/kg BW ), compared to the nonsupplemented group (p < 0.05), so rice straw intake was higher than in the group without ß-glucan supplementation. In addition, total feed intake increased with the higher level of ß-glucan supplementation. The estimated energy intake was not altered by ß-glucan supplementation (p > 0.05). The experimental diet had no effect (p > 0.05) on the apparent digestibility of DM, OM, NDF or ADF. However, the digestibility of CP was significantly different among treatment and supplementation at 4.7 g/day ß-glucan which was the highest level (63.2%) among all diets. ß-glucan supplementation did not affect rumen pH, temperature or ruminal NH -N concentration. In addition, blood urea-N levels were similar among experimental groups. The population of protozoa at 4 hr post-feeding increased along with ß-glucan supplementation and was highest at 4.7 g of ß-glucan. Based on this experiment, it could be concluded that supplementation of ß-glucan at 4.7 g improved rice straw intake, as well as total intake and digestibility of CP in Thai native beef cattle.
本研究旨在评估β-葡聚糖对采食低质量粗饲料的泰国本地肉牛采食量、养分消化率和瘤胃发酵的影响。根据4×4拉丁方设计，将4头初始体重（BW）为100±20.0千克的泰国本地肉牛随机分配，分别接受β-葡聚糖剂量为0、1.6、3.1和4.7克/天的四种处理。在牛中添加0 - 4.7克β-葡聚糖不影响干物质（DM）、有机物（OM）、粗蛋白（CP）、中性洗涤纤维（NDF）或酸性洗涤纤维（ADF）的摄入量。然而，与未添加组相比，添加β-葡聚糖显著提高了稻草摄入量（克/千克体重）（p < 0.05），因此稻草摄入量高于未添加β-葡聚糖的组。此外，随着β-葡聚糖添加水平的提高，总采食量增加。β-葡聚糖添加对估计能量摄入量没有影响（p > 0.05）。实验日粮对DM、OM、NDF或ADF的表观消化率没有影响（p > 0.05）。然而，CP的消化率在各处理间存在显著差异，且在β-葡聚糖添加量为4.7克/天（所有日粮中最高水平，为63.2%）时显著不同。添加β-葡聚糖不影响瘤胃pH值、温度或瘤胃氨氮浓度。此外，实验组之间的血尿素氮水平相似。采食后4小时原生动物数量随β-葡聚糖添加量增加而增加，在β-葡聚糖为4.7克时最高。基于本实验，可以得出结论，添加4.7克β-葡聚糖可提高泰国本地肉牛的稻草摄入量以及CP的总摄入量和消化率。
