Zhang Xiongfei, Lv Jirong, Hui Jingtao, Wu Ao, Zhao Lichao, Feng Linyu, Deng Lu, Yu Miao, Liu Feng, Yao Junhu, Lei Xinjian
College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China.
Key Laboratory of Livestock Biology, Northwest A&F University, Yangling, Shaanxi 712100, China.
Anim Nutr. 2024 Jun 8;18:166-176. doi: 10.1016/j.aninu.2024.04.018. eCollection 2024 Sep.
The purpose of this study was to investigate the effects of dietary saccharin sodium supplementation on production performance, serum biochemical indicators, and rumen fermentation of dairy goats in summer. Twelve Guanzhong dairy goats with similar body weight, days in milk, and milk yield were randomly divided into two dietary treatments: (1) CON: basal diet; (2) SS: basal diet + 150 mg/kg saccharin sodium on the basis of dry matter. The experiment lasted 35 d, including 7 d for adaptation and 28 d for dietary treatments, sampling and data collection. Each dairy goat was housed individually in a clean separate pen with ad libitum access to diet and water. The goats fed SS diet had increased dry matter intake (DMI; = 0.037), 4% fat corrected milk yield ( = 0.049), energy corrected milk yield ( = 0.037), milk protein yield ( = 0.031), and total solids yield ( = 0.036). Serum activity of aspartate aminotransferase ( = 0.047) and concentrations of 70-kDa heat shock protein ( = 0.090), malondialdehyde ( = 0.092), and total protein ( = 0.057) were lower in goats fed SS diet than those fed CON diet. Supplementation of saccharin sodium tended to increase activity of glutathione peroxidase in serum ( = 0.079). The concentrations of rumen total volatile fatty acid ( = 0.042) and butyrate ( = 0.038) were increased by saccharin sodium supplementation. Dietary supplementation of saccharin sodium increased the relative abundance of ( = 0.022), ( = 0.022), ( = 0.025), and ( = 0.037), but reduced the relative abundance of ( = 0.037) and ( = 0.037) in rumen. Saccharin sodium was observed in feces and urine of goats fed diet supplemented with saccharin sodium, but saccharin sodium was undetectable in the milk of goats receiving SS diet. In conclusion, administration of saccharin sodium was effective in increasing fat and energy corrected milk yield by increasing DMI and improving rumen fermentation and antioxidant capacity of dairy goats in summer. In addition, saccharin sodium residue was undetectable in the milk.
本研究旨在探讨夏季日粮中添加糖精钠对奶山羊生产性能、血清生化指标及瘤胃发酵的影响。选取12只体重、泌乳天数和产奶量相近的关中奶山羊，随机分为两种日粮处理组：（1）CON组：基础日粮；（2）SS组：在干物质基础上，基础日粮 + 150 mg/kg糖精钠。试验持续35天，包括7天适应期和28天日粮处理、采样及数据收集期。每只奶山羊单独饲养在干净的隔离栏中，自由采食日粮和饮水。饲喂SS日粮的奶山羊干物质采食量（DMI；P = 0.037）、4%乳脂校正乳产量（P = 0.049）、能量校正乳产量（P = 0.037）、乳蛋白产量（P = 0.031）和总固体产量（P = 0.036）均有所增加。饲喂SS日粮的奶山羊血清天冬氨酸转氨酶活性（P = 0.047）、70-kDa热休克蛋白浓度（P = 0.090）、丙二醛浓度（P = 0.092）和总蛋白浓度（P = 0.057）均低于饲喂CON日粮的奶山羊。添加糖精钠有增加血清谷胱甘肽过氧化物酶活性的趋势（P = 0.079）。添加糖精钠可提高瘤胃总挥发性脂肪酸浓度（P = 0.042）和丁酸浓度（P = 0.038）。日粮中添加糖精钠可增加瘤胃中普雷沃氏菌属（P = 0.022）、瘤胃球菌属（P = 0.022）、丁酸弧菌属（P = 0.025）和密螺旋体属（P = 0.037）的相对丰度，但降低了瘤胃中拟杆菌属（P = 0.037）和普氏菌属（P = 补0.037）的相对丰度。在饲喂添加糖精钠日粮的奶山羊粪便和尿液中检测到了糖精钠，但在饲喂SS日粮的奶山羊乳汁中未检测到糖精钠。总之，夏季给奶山羊添加糖精钠可通过增加干物质采食量、改善瘤胃发酵和抗氧化能力，有效提高乳脂和能量校正乳产量。此外，在羊奶中未检测到糖精钠残留。
