本试验旨在探讨饲粮中添加红花籽油对育肥猪生长性能和背最长肌脂代谢指标、脂肪酸组成的影响。试验采用单因素完全随机设计，选取平均体重为（60.00±6.00）kg的“杜×长×大”杂交育肥猪60头，随机分为4组，每组3个重复，每个重复5头猪。4组育肥猪分别饲喂含1.20%大豆油（对照组）、0.80%大豆油+0.40%红花籽油（0.40%红花籽油组）、0.40%大豆油+0.80%红花籽油（0.80%红花籽油组）、1.20%红花籽油（1.20%红花籽油组）的试验饲粮。试验期70 d。结果表明：1）与对照组相比，各红花籽油添加组育肥猪的平均日增重有增加的趋势，平均日采食量和料重比有降低的趋势，但均无显著差异（P>0.05）。2）与对照组相比，0.80%和1.20%红花籽油组育肥猪的背最长肌总胆固醇（TC）含量显著降低（P<0.05）；0.80%红花籽油组的背最长肌低密度脂蛋白（LDL）含量极显著降低（P<0.01）。3）与对照组相比，各红花籽油添加组育肥猪的背最长肌棕榈酸、亚油酸、花生四烯酸、亚麻酸和必需脂肪酸含量有增加的趋势，但差异不显著（P>0.05）。由此可见，饲粮中添加红花籽油可改善育肥猪的生长性能，促进脂代谢，提高肌肉中不饱和脂肪酸的含量。

This study was conducted to investigate the effect of dietary safflower oil on growth performance, lipid metabolism indices and fatty acid composition of longissimus dorsi of fattening pigs. A total of 60 Duroc×Landrace×Yorkshire crossbred pigs with an average body weight of (60.00±6.00) kg were randomly divided into 4 groups with 3 replicates per group and 5 pigs per replicate by single-factor completely random design. Pigs in the 4 groups were fed the experimental diets containing 1.20% soybean oil (control group), 0.80% soybean oil+0.40% safflower oil (0.40% safflower oil group), 0.40% soybean oil+0.80% safflower oil (0.80% safflower oil group) and 1.20% safflower oil (1.20% safflower oil group), respectively. The experimental period lasted for 70 days. The results showed as follows:1) compared with control group, the average daily gain of fattening pigs in all safflower oil supplemental groups had a increasing tendency, and the average daily feed intake and the ratio of feed to gain had a decreasing tendency, but the differences were not significant (P>0.05). 2) Compared with control group, the content of total cholesterol of longissimus dorsi of fattening pigs in 0.80% and 1.20% safflower oil groups was significantly decreased (P<0.05), and the content of low density lipoprotein of longissimus dorsi in 0.80% safflower oil group was extremely significantly decreased (P<0.01). 3) Compared with control group, the contents of palmitic acid, linoleic acid, arachidonic acid, linolenic acid and essential fatty acids of longissimus dorsi of fattening pigs in all safflower oil supplemental groups had a increasing tendency, but the differences were not significant (P>0.05). In conclusion, dietary safflower oil can improve the growth performance and lipid metabolism of fattening pigs, and increase the content of unsaturated fatty acids of muscle.