本研究旨在探讨3种不同类型的轻音乐对奶牛泌乳性能及能量代谢指标的影响。选用泌乳量、年龄、胎次、泌乳期相近的荷斯坦泌乳牛64头，随机分成4组，即轻音乐A（速度60 bmp的钢琴轻音乐《梁祝》，音色圆润）组、轻音乐B（速度70 bmp、小提琴演奏的泌乳牛情绪调控曲，音色明亮）组、轻音乐C（速度60 bmp、钢琴演奏的奶牛泌乳性能调控曲，音色圆润）组和对照组，每组16头。3个轻音乐组分别于早、中、晚3次挤奶前各播放音乐2 h，对照组无音乐播放。预试期7 d，正试期60 d。正试期每隔20 d测定泌乳量，并采集血样和乳样。结果表明：1）试验20、40 d及1~60 d，轻音乐A组、轻音乐B组和轻音乐C组奶牛干物质、有机物、中性洗涤纤维、酸性洗涤纤维、粗蛋白质和粗脂肪摄入量均高于对照组。2）试验1~60 d，轻音乐C组奶牛泌乳量、4%标准乳产量显著或极显著高于对照组（P<0.05或P<0.01）。3）试验1~60 d，轻音乐B组和轻音乐C组血液谷草转氨酶、丙氨酸转氨酶活性显著低于对照组（P<0.05），轻音乐C组血液谷丙转氨酶、乳酸脱氢酶活性显著低于对照组（P<0.05）。4）试验40、60 d，轻音乐C组奶牛血液甘油三酯含量显著高于对照组（P<0.05）；试验1~60 d，轻音乐C组奶牛血液葡萄糖含量显著高于对照组（P<0.05）；整个试验期，轻音乐A组、轻音乐B组和轻音乐C组奶牛血液游离脂肪酸含量均低于对照组，但差异不显著（P>0.05）。综上所述，3种轻音乐均有提高奶牛营养物质摄入量、刺激泌乳及改善奶牛能量代谢指标的作用趋势；70 bmp的轻音乐较60 bmp的轻音乐对奶牛泌乳更为有利；与音色明亮的轻音乐相比，奶牛对音色圆润的轻音乐敏感性更高，音色圆润的轻音乐更能提高奶牛泌乳性能。

The aim of this trial was to discuss the effects of three different types of light music on lactation performance and energy metabolism indicators of dairy cows. Sixty-four Holstein lactating cows with similar milk yield, age, parity and lactation period were enrolled and randomly divided into four groups, i.e. control group, light music group A (piano light music Liangzhu at speed of 60 bmp and with mellow tone), light music group B (violin light music regulating lactating cows' emotion at speed of 70 bmp and with bright tone) and light music group C (piano light music regulating lactating cows' lactating performance at speed of 60 bmp and with mellow tone), with 16 cows in each group. Music was played before 3 milking times one day of morning, afternoon and evening in the three light music groups with each time of 2 hours, and no music was played in the control group. The preliminary trial period was 7 days, and the trial period was 60 days. Milk yield was measured every 20 days, and blood and milk samples were collected. The results showed as followed: 1) at 20 and 40 d and 1 to 60 d, the intakes of dry matter, organic matter, neutral detergent fiber, acid detergent fiber, crude protein, ether extract in light music group A, light music B and light music group C were higher than those in control group. 2) At 1 to 60 d, milk yield and 4% fat corrected milk yield in light music group C was significantly higher than those in control group (P<0.05 or P<0.01). 3) At 1 to 60 d, blood activities of glutamic-oxal(o)acetic transaminase and alanine transaminase in light music group B and light music C were significantly lower than those in control group (P<0.05), and blood activities of glutamic pyruvic and lactate dehydrogenase in light music group C were significantly higher than those in control group (P<0.05). 4) At 40 and 60 d, blood triglyceride content in light music group C was significantly higher than that in control group (P<0.05); at 1 to 60 d, blood glucose content in light music group C was significantly higher than that in control group (P<0.05); during the whole experiment period, blood non-esterified fatty acid content in light music group A, light music group B and light music group C was lower than that in control group, but the difference was not significant (P>0.05). In conclusion, three kinds of light music all have the tendency of improving nutrient intakes of dairy cows, stimulating lactation and improving energy metabolism indicators of dairy cows; light music at speed of 70 bmp is more favorable than that at speed of 60 bmp to improve lactation performance of dairy cows; compared the bright light music, dairy cows have higher sensitivity to mellow light music, and mellow light music is better in improving lactation performance of dairy cows.