Abstract:

The objectives of this study were to investigate the effects of different sources and supplemental dosages of selenium on the piglets growth performance, plasma selenium content and anti-oxidative activities and antioxidant capacity; Three different sources of selenium: Sodium Selenite, Nano-selenium and Selenium Yeast and three dietary supplemental levels at 0.3, 0.5 and 0.7 mg·kg^-1 were used. The piglets fed on a basal diet without external Se sources were used as control group. Six hundreds healthy D×LW×L hybrid piglets at the age of (28±3.5) days, and average initial body weight ((8.50±0.52) kg) were divided into 10 groups with 3 replicates each group and 20 piglets (10 males and 10 females) per replicate and fed with the experimental diets. The trial lasted for 46 days. The results were as follows: ①The difference was not significant in the average daily feed intake of the piglet fed different selenium sources (P>0.05), but the daily gain in the 0.3 and 0.5 mg·kg^-1 nano-selenium groups and 0.5 mg·kg ^-1 yeast selenium group was significantly higher than that in control group (P<0.05), and 0.5 mg·kg^-1 nano-selenium group was significantly higher than that in 0.7 mg·kg ^-1 sodium selenite group (P<0.05). ② The difference was not significant in plasma selenium content of the piglet fed different selenium sources (P>0.05). ③The difference was not significant in the serum MDA level of piglet fed different selenium sources (P>0.05), the serum-AOC level in the 0.5 mg·kg^-1 nano-selenium and 0.5 mg·kg^-1 yeast selenium groups were significantly higher than that in control group(P<0.05), and the GSH-PX levels in 0.5 mg·kg^-1 nano-selenium group was significantly higher than that in the control group (P<0.05).