Cai Liyuan, Hartanto Rudy, Zhang Ji, Qi Desheng
Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
Department of Animal Science, Faculty of Animal and Agricultural Sciences, Diponegoro University, Semarang 50275, Indonesia.
Animals (Basel). 2021 Nov 15;11(11):3261. doi: 10.3390/ani11113261.
This study aimed to evaluate the effects of on rumen fermentation and the growth performance of heat-stressed goats. The in vitro fermentation was carried out using supplement at 0% (CG), 0.025% (CB1), 0.05% (CB2), 0.10% (CB3), and 0.20% (CB4) of the dry matter (DM) weight of basal diet. Results showed that ruminal pH and the concentrations of ammonia nitrogen, total volatile fatty acids, acetic acid, propionic acid, as well as the acetic acid to propionic acid ratio were significantly increased ( < 0.05) in CB2 and CB3 compared with the CG group. Additionally, significant increases ( < 0.05) in the degradability of DM, neutral detergent fiber, and acid detergent fiber were observed in CB2 and CB3 compared with the CG group. For the in vivo study, 12 heat-stressed goats were divided equally into three groups: the control (HS1) was fed the basal diet, and groups HS2 and HS3 were fed with 0.05% and 0.10% added to the basal diet, respectively. The experiment was designed as a 3 × 3 Latin square. Similar effects on rumen fermentation and digestibility parameters were obtained with 0.05% of supplement compared to the in vitro study. Moreover, the dry matter intake and average daily gain were significantly increased ( < 0.05) in HS2 compared with other groups. These results indicated that an effective dose of supplement (0.05%) could improve the rumen fermentation and growth performance of heat-stressed goats.
本研究旨在评估[具体物质]对热应激山羊瘤胃发酵及生长性能的影响。体外发酵采用在基础日粮干物质（DM）重量的0%（CG）、0.025%（CB1）、0.05%（CB2）、0.10%（CB3）和0.20%（CB4）添加[具体物质]进行。结果表明，与CG组相比，CB2和CB3组瘤胃液pH值、氨氮浓度、总挥发性脂肪酸、乙酸、丙酸浓度以及乙酸与丙酸比值均显著升高（P<0.05）。此外，与CG组相比，CB2和CB3组干物质、中性洗涤纤维和酸性洗涤纤维的降解率显著提高（P<0.05）。在体内研究中，12只热应激山羊被平均分为三组：对照组（HS1）饲喂基础日粮，HS2组和HS3组分别在基础日粮中添加0.05%和0.10%的[具体物质]。实验设计为3×3拉丁方。与体外研究相比，添加0.05%的[具体物质]对瘤胃发酵和消化率参数有相似的影响。此外，与其他组相比，HS2组干物质采食量和平均日增重显著增加（P<0.05）。这些结果表明，有效剂量的[具体物质]添加量（0.05%）可改善热应激山羊的瘤胃发酵和生长性能。
