Effects of Different Sources and Levels of Selenium on Growth Performance and Tissue Selenium Content of 10～11 months Porcupine

The objective of this experiment was to explore the effects of different sources and levels of selenium （Se） on growth performance and tissue Se content of 10～11 months porcupine.Eighty and 10-month-old porcupine with a similar body weight were assigned to 5 groups with 8 replicates of 2 porcupines each.The porcupine were fed a basal diet without Se complementation （control group） or the basal diet adding 0.30 mg/kg Se in the form of sodium selenite （group Ⅰ），0.20 mg/kg Se in the form of yeast selenium （group Ⅱ），0.30 mg/kg Se in the form of yeast selenium （group Ⅲ） and 0.30 mg/kg mixed Se （0.15 mg/kg sodium selenite and 0.15 mg/kg yeast selenium）（group Ⅳ），respectively.The pre-test period lasted for 7 days and the trial period lasted for 45 days.The results showed that compared with the control group，there was no significant differences in the average daily feed intake （ADFI） in each group （P＞0.05），the average daily gain （ADG） in groups Ⅱ and Ⅲ was significantly increased （P＜0.05），the feed/gain （F/G） in group Ⅲ was significant decreased （P＜0.05）.Compared with the control group，the concent of Se in liver and muscle of group Ⅲ was extremely significantly increased （P＜0.01），the content of Se in liver and muscle of groups Ⅱ and Ⅳ was also significantly increased （P＜0.05 or P＜0.01），and there was no significant difference in group Ⅰ（P＞0.05）.In conclusion，the basal diet supplemented with yeast selenium could improve the growth performance and increase the tissue Se concent in 10～11 months porcupine，and adding 0.30 mg/kg yeast selenium had the best effect.