本研究旨在探讨日粮能量水平对6-10周龄扬州鹅生产性能和脂肪沉积的影响。选用35日龄、体重相近的扬州鹅200只，随机分成4组，每组5个重复，每个重复10只，公母各1/2。Ⅰ～Ⅳ组日粮能量水平分别为10.11、11.19、12.37和13.45 MJ/kg，试验期35 d。结果表明：（1）Ⅱ组的平均日采食量显著高于Ⅳ组，Ⅲ和Ⅳ组的料重比显著低于Ⅰ和Ⅱ组（P<0.05）；（2）Ⅳ组的屠宰率和腿脂率显著高于Ⅰ组(P<0.05)，Ⅲ和Ⅳ组的腹脂率极显著高于Ⅰ组(P<0.01)；（3）日粮能量水平对血清总胆固醇、谷丙转氨酶、谷草转氨酶、尿酸、葡萄糖、碱性磷酸酶和乳酸脱氢酶无显著影响(P>0.05)，Ⅲ组的血清高密度脂蛋白和低密度脂蛋白显著高于Ⅱ组(P<0.05)，而极低密度脂蛋白和甘油三酯显著低于Ⅱ组(P<0.05)，Ⅲ组的血清总蛋白和白蛋白显著低于Ⅰ组(P<0.05)。由此可知，高能量日粮显著提高6-10周龄扬州鹅的屠宰率、腹脂率和腿脂率，降低采食量和料重比。但是，腹脂率过高(5.4%)将导致饲料成本增加。因此，建议6-10周龄扬州鹅日粮的适宜能量水平为12.37 MJ/kg。

This trial was conducted to study the effects of dietary energy levels on performance and fat deposition of Yangzhou goslings from 6 to 10 weeks of age. Two hundred 35-day-old Yangzhou goslings with similar body weight were divided into 4 groups with 5 replicates in each group, and each replicate had 10 goslings with half female and half male. Diets of group Ⅰ～Ⅳ with different energy levels (10.11, 11.19, 12.37 and 13.45 MJ/kg) were fed for 35 d. The results were as follows: 1) average daily feed intake of goslings in group Ⅱ was significantly higher than that in group Ⅳ (P<0.05), and the feed/gain of goslings in group Ⅲ and Ⅳ were significantly lower than that in groupⅠ and Ⅱ (P<0.05); 2) dressing percentage and leg fat percentage of goslings in group Ⅳ were significantly higher than those in groupⅠ(P<0.05), and percentages of abdominal fat in group Ⅲ and Ⅳ were significantly higher than those in groupⅠ(P<0.01); 3) No significant differences were found in serum total cholesterol, alanine aminotransferase, aspartate aminotransferase, uric acid, glucose, alkaline phosphatase and lactate dehydrogenase among 4 groups during the feeding trial (P>0.05), and high density lipoprotein and low density lipoprotein of goslings in group Ⅲ were significantly higher than those in group Ⅱ, however, triglyceride and very low density lipoprotein of goslings in serum were significantly lower than those in group Ⅱ(P<0.05), and serum total protein and albumin of goslings in group Ⅲ were significantly lower than those in groupⅠ(P<0.05). In conclusion, the high-energy diet could improve the dressing percentage, abdominal fat percentage and leg fat percentage, and reduce the average daily feed intake and feed/gain. However, the high percentage of abdominal fat (5.4%) would result in the increase of feed cost. It was suggested that the optimal energy requirement was 12.37 MJ/kg, which could provide a scientific basis for the most appropriate feeding of Yangzhou goslings from 6 to 10 weeks of age. ［Chinese Journal of Animal Nutrition, ２００9，２1（5）:659-664］