为了研究玉米油和猪油对肉鸡生产性能、屠宰性能及血清生化指标的影响，试验选用90只1日龄肉鸡母雏，随机分为3个处理，每个处理6个重复，每个重复5只鸡。试验组分别添加2.5%玉米油和猪油，对照组饲粮不添加油脂，42日龄屠宰。结果表明：1）玉米油组和猪油组肉鸡的采食量、体增重、胸肌重、腿肌重均差异不显著（P>0.05），但2组肉鸡的体增重与腿肌重均显著高于对照组（P<0.05），玉米油组的采食量和猪油组的胸肌重均显著高于对照组（P<0.05），猪油组皮下脂肪厚度显著高于玉米油组和对照组（P<0.05），而各组耗料增重比差异不显著（P>0.05）。2）各组肉鸡血清总蛋白、白蛋白、球蛋白和尿素含量及γ-谷氨酸转移酶和谷草转氨酶活性没有显著差异（P>0.05），猪油组和玉米油组肉鸡血清尿酸含量显著降低（P<0.01）。与对照组相比，玉米油组肉鸡血清总胆固醇（P<0.01）、甘油三酯（P<0.01）、低密度脂蛋白胆固醇（P<0.05）和葡萄糖含量（P<0.01）显著降低，而其血清谷丙转氨酶活性显著升高（P<0.05）。由此可知，玉米油组与猪油组肉鸡的生产性能和肌肉性状指标无显著差异，饲粮不添加油脂将显著降低肉鸡采食量和体增重，显著增加其血清尿酸含量，但玉米油可以显著提高肉鸡血清谷丙转氨酶的活性，显著降低其血糖和血脂含量，猪油可显著增加肉鸡皮下脂肪厚度。
This experiment was conducted to investigate the effects of supplementation of corn oil and lard on the growth and slaughter performance, and serum biochemical indices in broilers. Ninety 1-day-old female broilers were randomly assigned to three treatments (six replicates per treatment with five broilers per replicate). The control diet had no oil, and the treatment diets contained 2.5% corn oil and 2.5% lard, respectively. They were slaughtered on the 42nd day. The results showed as follows: 1) there were no significant differences in the feed intake, body weight gain, and the weight of pectoral muscle and leg muscle of broilers between corn oil group and lard group （P>0.05）, but all of these except for pectoral muscle weight in corn oil group were significantly higher than those in control group （P<0.05）. Subcutaneous fat thickness of broilers in lard group was significantly higher than that in corn oil group and lard group （P<0.05）. There was no significant difference in feed/gain among all groups （P>0.05）. 2） There were no significant differences in the contents of total protein, albumin, globulin and urea, and the activities of gamma-glutamyltransferase and glutamic-oxaloacetic transaminase in serum of broilers among all groups （P>0.05）. Serum uric acid content of broilers in corn oil group and lard group was significantly lower than that in control group （P<0.01）. Compared with control group, the contents of total cholesterol （P<0.01）, triglyceride （P<0.01）, low density lipoprotein cholesterol （P<0.05） and glucose （P<0.01） in serum of broilers in corn oil group were significantly decreased, but alanine transaminase activity was significantly increased （P<0.05）. It suggests that there are no significant differences in growth and muscle performance of broilers between corn oil group and lard group, but feed intake and body weight gain of broilers fed the diets without oil will be significantly decreased, and serum uric acid will be significantly increased; corn oil can increase serum alanine transaminase activity and decrease the contents of blood lipid and glucose, and lard can increase subcutaneous fat thickness.［Chinese Journal of Animal Nutrition, 2011, 23（7）：1101 -1108］
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