Cheng Yanming, Zhang Han, Zhang Jiawei, Duan Hongwei, Yin Yuyang, Li Yufeng, Mao Shengyong
Laboratory of Gastrointestinal Microbiology, National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing, China.
Ruminant Nutrition and Feed Engineering Technology Research Center, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China.
Front Vet Sci. 2024 Nov 27;11:1503172. doi: 10.3389/fvets.2024.1503172. eCollection 2024.
This study aimed to examine the effects of fermented rice husk powder feed on growth performance, apparent nutrient digestibility, and rumen microbial communities in fattening Hu sheep.
Twenty-one male Hu sheep with similar body weights (32.68 ± 1.59 kg) were randomly assigned to three groups: a control group (CON) receiving a TMR with soybean straw, a rice husk powder group (RH), and a fermented rice husk powder group (FHR).
The results indicated that the FHR group exhibited a significant increase in ADG and FBW of Hu sheep compared to the other two groups ( < 0.05). The digestibility of CP and EE was significantly higher in the CON and FHR groups than in the RH group ( < 0.01). Furthermore, the digestibility of DM in the CON group was higher than in the FHR and RH groups ( < 0.01). The FHR group showed lower NDF and ADF digestibility compared to the CON group, but higher than the RH group ( < 0.05). Additionally, serum ALB and ALT levels in the CON group were elevated compared to those in the two groups ( < 0.05). The rumen concentrations of TVFA, butyrate, and valerate in the FHR group were significantly elevated compared to the other two groups ( < 0.05). At the genus level, the relative abundances of , , , , , and were significantly diminished in the FHR group compared to the CON group ( < 0.05). In contrast, the relative abundance of was significantly higher ( < 0.05), while the abundances of and were significantly lower ( < 0.05) in the RH group compared to the CON group. Spearman correlation analysis revealed negative correlations between the and propionate, butyrate, and TVFA, as well as between and both propionate and TVFA. Conversely, showed a positive correlation with propionate and TVFA.
In conclusion, replacing 15% of soybean straw with fermented rice husk powder feed modified the rumen microbiota and improved the growth performance of fattening Hu sheep.
本研究旨在探讨发酵稻壳粉饲料对育肥湖羊生长性能、表观养分消化率和瘤胃微生物群落的影响。
将21只体重相近（32.68±1.59千克）的雄性湖羊随机分为三组：对照组（CON），饲喂含大豆秸秆的全混合日粮；稻壳粉组（RH）；发酵稻壳粉组（FHR）。
结果表明，与其他两组相比，FHR组湖羊的平均日增重（ADG）和末重（FBW）显著增加（P<0.05）。CON组和FHR组粗蛋白（CP）和粗脂肪（EE）的消化率显著高于RH组（P<0.01）。此外，CON组干物质（DM）的消化率高于FHR组和RH组（P<0.01）。与CON组相比，FHR组中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）的消化率较低，但高于RH组（P<0.05）。此外，CON组血清白蛋白（ALB）和谷丙转氨酶（ALT）水平高于其他两组（P<0.05）。与其他两组相比，FHR组瘤胃挥发性脂肪酸（TVFA）、丁酸和戊酸的浓度显著升高（P<0.05）。在属水平上，与CON组相比，FHR组中[具体菌属1]、[具体菌属2]、[具体菌属3]、[具体菌属4]、[具体菌属5]和[具体菌属6]的相对丰度显著降低（P<0.05）。相反，与CON组相比，RH组中[具体菌属7]的相对丰度显著更高（P<0.05），而[具体菌属8]和[具体菌属9]的丰度显著更低（P<0.05）。Spearman相关性分析显示，[具体菌属10]与丙酸、丁酸和TVFA之间呈负相关，[具体菌属11]与丙酸和TVFA之间也呈负相关。相反，[具体菌属12]与丙酸和TVFA呈正相关。
总之，用发酵稻壳粉饲料替代15%的大豆秸秆可改变瘤胃微生物群，提高育肥湖羊的生长性能。
