Cherdthong Anusorn, Supapong Chanadol
Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand.
Trop Anim Health Prod. 2019 Nov;51(8):2139-2144. doi: 10.1007/s11250-019-01911-4. Epub 2019 May 10.
The aim of this work was to evaluate the influence of yeast (Saccharomyces cerevisiae)-fermented cassava bioethanol waste (YECAW) on feed utilization, ruminal fermentation, and microbial population in dairy calves fed a concentrate diet at 1% body weight (BW). Four male Holstein Friesian crossbred calves with an initial BW of 109 ± 6.23 kg were used in this research. The experimental design was a 4 × 4 Latin squared design and the dietary treatments were four levels of YECAW supplementation at 0%, 5%, 10%, and 20% concentrate mixture. The YECAW product contained CP at 25.1% dry matter (DM) and NDF and ADF at 65.2 and 40.6% DM, respectively. Inclusion of YECAW did not alter feed intake of rice straw, total intake, nutrient intake, and digestion coefficients (P > 0.05). Ruminal pH and temperature, ruminal ammonia-nitrogen, and blood urea-nitrogen (BUN) were not significant by YECAW levels supplementation (P > 0.05). Increasing YECAW levels did not adversely affect the population of bacteria, protozoa, and fungi and values ranged from 6.5 to 7.0 × 10, 3.2 to 4.0 × 10, and 6.9 to 7.4 × 10 cells/ml, respectively (P > 0.05). Feeding of YECAW to dairy calves did not affect the total VFA, acetic acid (C2), propionic acid (C3), or butyric acid (C4) proportion (P > 0.05) which ranged from 102.6 to104.6 mmol/l, 70.7 to 72.0, 17.8 to 20.2, and 9.1 to 10.3 mol/ 100 mol, respectively. Therefore, feeding of YECAW is recommended because no adversely affect the utilization of feed and rumen characteristics and might be alternative protein source for ruminants.
本研究旨在评估酵母（酿酒酵母）发酵木薯生物乙醇废料（YECAW）对体重按1%投喂精料的犊牛饲料利用率、瘤胃发酵及微生物种群的影响。本研究选用4头初始体重为109±6.23千克的雄性荷斯坦-弗里生杂交犊牛。试验设计为4×4拉丁方设计，日粮处理为在精料混合料中添加0%、5%、10%和20%四个水平的YECAW。YECAW产品干物质（DM）中粗蛋白含量为25.1%，中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）含量分别为65.2%和40.6%（DM）。添加YECAW未改变稻草采食量、总采食量、养分摄入量及消化率（P>0.05）。YECAW添加水平对瘤胃pH值和温度、瘤胃氨氮及血尿素氮（BUN）无显著影响（P>0.05）。YECAW水平升高对细菌、原虫和真菌数量无不利影响，其数量分别在6.5至7.0×10、3.2至4.0×10和6.9至7.4×10个细胞/毫升之间（P>0.05）。给犊牛饲喂YECAW对总挥发性脂肪酸（VFA）、乙酸（C2）、丙酸（C3）或丁酸（C4）比例无影响（P>0.05），其比例分别在102.6至104.6毫摩尔/升、70.7至72.0、17.8至20.2和9.1至10.3摩尔/100摩尔之间。因此，建议饲喂YECAW，因为它不会对饲料利用和瘤胃特性产生不利影响，且可能是反刍动物的替代蛋白质来源。
