HUBEI AGRICULTURAL SCIENCES ›› 2022, Vol. 61 ›› Issue (4): 121-126.doi: 10.14088/j.cnki.issn0439-8114.2022.04.024

• Aquatic Products • Previous Articles     Next Articles

Effects of dietary selenium on growth performance and blood parameters of juvenile Yellow River carp

LIN Shuai-chao, BAI Yin-long, XIONG Jian-li   

  1. College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, Henan, China
  • Received:2021-04-29 Online:2022-02-25 Published:2022-03-18

Abstract: To study the effects of dietary selenium (Se) on growth performance and blood parameters of juvenile Yellow River carp, a total of 240 healthy Yellow River carp juveniles, with initial body weight of (17.21±1.73) g and initial body length of (11.11±0.46) cm, were selected as the research objects. The fishes were randomly divided into 4 groups, with 3 replicates in each group and 20 replicates in each group 0 (control group), 0.25, 0.50 and 1.00 mg/kg sodium selenite were added to the dietary of each group, respectively. The experimental fishes were fed with basic diet for one week, and then the formal experiment was carried out for eight weeks. After the experiment, the growth performance and blood parameters of fishes were measured. The results showed that the final body weight of Yellow River carp juveniles was significantly increased by adding different contents of selenium in the dietary (P<0.05), The weight gain rate (WGR) and specific growth rate (SGR) of Yellow River carp were increased in different degrees. The WGR and SGR of 0.50 mg/kg group were significantly higher than that of the control group (P<0.05), the feed coefficient rate(FCR) was significantly lower than that of the control group (P<0.05). Dietary selenium level had no significant effect on the survival rate (SR) of juvenile Yellow River carp (P>0.05). With the increase of selenium content in dietary, the number of red blood cells (RBC), hemoglobin content (Hb) and mean corpuscular hemoglobin concentration (MCHC) of juvenile Yellow River carp were increased. The Hb was reached maximum in 0.50 mg/kg group, but the RBC and MCHC were reached maximum in 1.00 mg/kg group, which were significantly higher than those in control group (P<0.05). The mean corpuscular volume (MCV) and mean corpuscular hemoglobin (MCH) decreased with the increase of dietary selenium content, and reached the lowest level in 1.00 mg/kg group, which was significantly lower than that in the control group (P<0.05). Hematocrit (Hct) was not affected by selenium content in dietary. The optimum selenium content in the dietary of Yellow River carp was 0.50 mg/kg.

Key words: sodium selenite, Yellow River carp, growth performance, blood parameters

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