本试验旨在测定日粮添加硒代蛋氨酸对母猪生产性能及血清和乳中硒含量和抗氧化指标的影响。试验选取胎次相同、妊娠后期的长×大母猪12头，随机分为2组，每组6个重复，每重复1头，分别设为对照组(亚硒酸钠组)和试验组(DL-硒代蛋氨酸组)，均在基础日粮中(硒的实测值为0.04 mg/kg)添加0.3 mg/kg硒。试验分妊娠后期(32 d)和泌乳期(28 d)2阶段，试验期共计60 d。结果表明：与亚硒酸钠比，DL-硒代蛋氨酸使断奶窝重、断奶个体重和泌乳力分别提高了8.00%(P<0.05)、9.78%(P<0.05)和9.95%(P<0.05)；使母猪泌乳期血清总抗氧化能力增强(P<0.05)，丙二醛含量下降(P<0.01)；使初乳和第7天、第14天、第21天和第28天常乳中谷胱甘肽过氧化物酶活力和总抗氧化能力增强(P<0.05)，丙二醛含量下降(P<0.05)；使泌乳期母猪血清、初乳和常乳硒含量增高(P<0.05)。上述结果提示：DL-硒代蛋氨酸较亚硒酸钠能提高母猪乳和血清中硒含量，增强母猪的抗氧化能力，促进乳猪生长。

Effects of supplementation selenomethionine on performance, selenium concentrations and antioxidative indices in serum and milk in sows were studied. A total of 12 healthy sows (Landrace×Yorkshire) which were in the late period of pregnancy with the same parity, were randomly allocated into 2 treatments of 6 replicates of 1 sow. The control group received the basal diet (content of selenium was 0.04 mg/kg) supplemented with 0.3 mg/kg Se in form of sodium selenite (SS), and 0.3 mg/kg Se in form of DL-selenomethionine (DL-SeMet) was added to the basal diet for the experimental group. The total test period lasted for 60 d, including 32 d of prepartum and 28 d of lactation. Results showed that compared with SS group, the weanling litter weight, weanling individual weight and milking capacity in DL-SeMet group were significantly increased by 8.00% (P<0.05), 9.78% (P<0.05) and 9.95% (P<0.05), respectively. Serum T-AOC level was significantly increased (P<0.05) while MDA level was decreased (P<0.01) in serum of sows. In colostrum and milk on day 7, 14, 21 and 28, T-AOC level and GSH-Px activities were significantly increased (P<0.05) while the MDA level was decreased (P<0.05). Selenium content in serum and milk were significantly increased (P<0.05). These results suggested that DL-SeMet contributed to improving milk Se content and antioxidative capability in serum and milk of sows, and promoting the growth of nursing pigs.［Chinese Journal of Animal Nutrition, 2009，21(6):910-915］