Xue Ligang, Zhou Shuyi, Wang Dan, Zhang Fangyu, Li Junfeng, Cai Liyuan
College of Animal Science and Technology, Jilin Agricultural Science and Technology University, 77 Hanlin Road, Jilin 132109, China.
Hainan Provincial Animal Husbandry Technology Promotion Station, Haikou 570100, China.
Microorganisms. 2022 Sep 20;10(10):1877. doi: 10.3390/microorganisms10101877.
This study aimed to investigate the effects of on rumen fermentation and the growth performance of heat-stressed goats. The fermentation experiment was conducted using added at 0‱ (HS1), 0.30‱ (SC1), 0.60‱ (SC2), and 1.20‱ (SC3) of the dry matter (DM) weight of the basal diet. The results showed that supplementing with 0.60‱ (SC2) could increase the pH, acetic acid to propionic acid ratio, the concentrations of ammonia nitrogen, total volatile fatty acids, acetic acid, propionic acid, butyric acid, and the degradability of DM, neutral detergent fiber, and acid detergent fiber in rumen fluids of heat-stressed goats. In the feeding experiment, twelve heat-stressed goats were assigned to a 4 × 4 Latin square experimental design, and the supplement levels are similar to the fermentation experiment above. Similar effects on rumen fermentation and digestibility parameters were obtained with a supplement with 0.60‱ of (SC2A) compared to the fermentation trial. Moreover, in the SC2A group, the DM intake and average daily gain also increased significantly compared with other groups. These results suggested that a low dose of can still effectively improve the rumen fermentation and growth performance of heat-stressed goats.
本研究旨在探讨[具体物质]对热应激山羊瘤胃发酵及生长性能的影响。发酵试验采用在基础日粮干物质（DM）重量的0‱（HS1）、0.30‱（SC1）、0.60‱（SC2）和1.20‱（SC3）添加[具体物质]进行。结果表明，添加0.60‱（SC2）可提高热应激山羊瘤胃液的pH值、乙酸与丙酸比例、氨氮浓度、总挥发性脂肪酸浓度、乙酸浓度、丙酸浓度、丁酸浓度以及DM、中性洗涤纤维和酸性洗涤纤维的降解率。在饲养试验中，将12只热应激山羊分配到4×4拉丁方试验设计中，[具体物质]添加水平与上述发酵试验相似。与发酵试验相比，添加0.60‱[具体物质]（SC2A）对瘤胃发酵和消化率参数有类似影响。此外，在SC2A组中，DM摄入量和平均日增重也显著高于其他组。这些结果表明，低剂量的[具体物质]仍可有效改善热应激山羊的瘤胃发酵和生长性能。
