Abstract：
The present study aimed to evaluate the effect of dry turmeric rhizomes on in vitro biogas production and diet fermentability. Turmeric rhizomes were included at gradually increased levels: 0, 0.5, 1, 1.5 and 2% of a diet containing per kg dr matter (DM): 500 g concentrate feed mixture, 400 g berseem hay and 100 g rice straw, and incubated for 48 h. Gas chromatography-mass spectrometry analysis showed that ar-turmerone, α-turmerone and β-turmerone were the major bioactive compounds in the rhizomes. Turmeric rhizomes increased (p < 0.01) asymptotic gas production (GP) and rate and lag of CH4 production and decreased (p < 0.01) rate of GP, lag of GP, asymptotic CH4 production and proportion of CH4 production. Turmeric rhizome administration linearly increased (p < 0.01) DM and fiber degradability and concentrations of total short-chain fatty acids, acetic and propionic acids and ammonia-N and quadratically (p < 0.05) decreased fermentation pH. It is concluded that including up to 2% turmeric rhizomes improved in vitro ruminal fermentation and decreased CH4 production.
摘要：
本研究旨在评估干姜黄根茎对体外沼气生产和饮食发酵能力的影响。姜黄根茎以逐渐增加的水平包括：0，0.5，1，1.5和2％的饮食含有每公斤dr物质（DM）：500克浓缩饲料混合物，400克berseem干草和100克稻草，并孵育48小时。气相色谱-质谱分析显示，α-姜黄酮和β-姜黄酮是根茎中的主要生物活性化合物。姜黄根茎增加了(p<0.01)渐近产气(GP)和CH4产生的速率和滞后,降低了(p<0.01)GP的速率,GP的滞后，渐近CH4产量和CH4产量比例。姜黄根茎给药线性增加（p<0.01）DM和纤维降解性以及总短链脂肪酸浓度，乙酸和丙酸以及氨氮和二次（p<0.05）降低了发酵pH。结论是，包括高达2％的姜黄根茎改善了体外瘤胃发酵并降低了CH4的产量。
