摘要
The purpose of the present investigation was to detect the effect of replacement of soybean meal (SBM) with citric waste fermented yeast waste (CWYW) as an alternative protein source of portentous substances in a concentrate mixture diet of beef cattle on intake, digestibility, ruminal fermentation, plasma urea-nitrogen, energy partitioning, and nitrogen balance. Four Thai-native beef bulls (170 ± 10.0 kg of initial body weight) were randomly allocated to a 4 × 4 Latin square design. The dietary treatments were four levels of CWYW replacing SBM in a concentrated diet at ratios of 0, 33, 67, and 100%. SBM was added to the concentrate diet at a dose of 150 g/kg DM. All cattle were offered ad libitum rice straw and the concentrate diet at 5 g/kg of body weight. The study was composed of four periods, each lasting for 21 days. The findings demonstrated that there was no difference in total dry matter intake, nutritional intake, or digestibility between treatments (p > 0.05). When CWYW replaced SBM at 100% after 4 h of feeding, ruminal pH, ammonia nitrogen, plasma urea nitrogen, and bacterial population were highest (p 0.05) among dietary treatments. Urinary nitrogen excretion was greatest (p 0.05) among treatments. In conclusion, CWYW may be utilized as a substitute for SBM as a source of protein in Thai-native beef cattle without having an adverse impact on feed utilization, rumen fermentation characteristics, or blood metabolites.
摘要译文
本研究的目的是检测用柠檬油发酵酵母废物（CWYW）代替大豆粉（SBM）作为肉食饮食中浓缩物混合物中的替代蛋白质来源的替代蛋白质来源。发酵，血浆尿素氮，能量分配和氮平衡。将四个泰国牛肉公牛（170±10.0 kg初始体重）随机分配给4×4拉丁正方形设计。饮食治疗是以0％，33、67和100％的比率以浓缩饮食替代SBM的四个水平的CWYW水平。以150 g/kg DM的剂量将SBM添加到浓缩饮食中。所有牛都会随意稻草，并以5 g/kg的体重提供浓缩饮食。该研究由四个时期组成，每个时期持续21天。研究结果表明，总干物质摄入量，营养摄入量或治疗之间的消化率没有差异（p> 0.05）。4小时后，CWYW以100％的速度替换SBM时，在饮食治疗中，瘤胃pH，氮，血浆尿素氮和细菌种群最高（p 0.05）。在处理中，尿氮的排泄最大（p 0.05）。总之，CWYW可以用作SBM的替代品作为泰国本地牛奶中蛋白质的来源，而不会对饲料利用率，瘤胃发酵特征或血液代谢产物产生不利影响。
Suriyapha; Chaichana[1];Suntara; Chanon[1];Wanapat; Metha[1];Cherdthong; Anusorn[1]. Effects of substituting agro-industrial by-products for soybean meal on beef cattle feed utilization and rumen fermentation[J]. Scientific reports, 2022: 1-11