【摘要】 为了研究黑曲霉（Aspergillus niger）对湖羊生产性能、瘤胃发酵参数及甲烷排放的影响，试验将15只雄性、体重为（21.69±1.19）kg、3月龄左右的育肥湖羊随机分为3组，分别为对照组、7.5 g黑曲霉组和10 g黑曲霉组，每组5个重复，每个重复1只。预试期7 d,正试期28 d。试验结束后统计各组平均日增重、平均日采食量和料重比并进行经济效益分析，检测环境中CO₂和CH₄的排放量；采集瘤胃液进行瘤胃pH值及氨态氮（NH₃-N）、微生物蛋白（MCP）、挥发性脂肪酸（VFA）质量浓度的检测。结果表明：与对照组相比，7.5 g黑曲霉组和10 g黑曲霉组的平均日采食量显著降低（P<0.05）,瘤胃pH值显著升高（P<0.05）,瘤胃NH₃-N和MCP质量浓度显著降低（P<0.05）;总挥发性脂肪酸、戊酸、丙酸质量浓度显著降低（P<0.05）,乙酸/丙酸显著升高（P<0.05）,且7.5 g黑曲霉组的丁酸质量浓度显著降低（P<0.05）;CH₄、CO₂排放量和CO₂当量（CO₂-eq）均显著降低（P<0.05）,头日利润提高比例分别为25.00%和39.29%。说明黑曲霉可以降低湖羊的平均日采食量，在不影响其生长性能的情况下提升经济效益，同时可降低CH₄和CO₂排放量。更多还原

【Abstract】 To study the effects of Aspergillus niger on the production performance, rumen fermentation parameters, and methane emission of Hu sheep, fifteen male fattening Hu sheep with body weight of（21.69±1.19） kg were randomly divided into three groups, namely the control group, 7.5 g Aspergillus niger group and 10 g Aspergillus niger group, with five replicates per group and one sheep per replicate. The pre-trial period lasted for 7 days and the experimental period lasted for 28 days. The average daily gain, average daily feed intake and material-to-weight ratio were calculated during the experiment, CO₂ and CH₄ emissions of enviroment in each group were detected, and rumen fluid were collected after the experiment to measure rumen pH value, ammonia nitrogen（NH₃-N）, microbial protein（MCP） and volatile fatty acid（VFA）. The results showed that compared with the control group, the average daily feed intake in the 7.5 g Aspergillus niger group and 10 g Aspergillus niger group was significantly decreased（P<0.05）; the rumen pH value was significantly increased（P<0.05）; the rumen NH₃-N and the MCP mass concentration were significantly decreased（P<0.05）; the mass concentration of total volatile fatty acids, valeric acid and propionic acid were significantly decreased（P<0.05）, but the contents of acetic acid and propionic acid was significantly increased（P<0.05）, and the mass concentration of butyric acid in the 7.5 g Aspergillus niger group was significantly decreased（P<0.05）. In addition, compared with the control group, the emissions of CH₄ and CO₂ and the carbon dioxide equivalent（CO₂-eq） in the 7.5g and 10 g Aspergillus niger groups were significantly decreased（P<0.05）, and the first-day profits were increased by 25.00% and 39.29%, respectively. The results indicated that Aspergillus niger could reduce the average daily feed intake of Hu sheep, improve economic benefits without affecting its growth performance, and reduce CH₄ and CO₂ emissions.更多还原