›› 2018, Vol. 45 ›› Issue (6): 1502-1509.doi: 10.16431/j.cnki.1671-7236.2018.06.010

Previous Articles     Next Articles

Effects of Enterococcus faecium on Production Performance, Immune Organ Indexes and Blood Lipid Metabolism-related Indexes in AA Broilers

PENG Zhong, DONG Li, WANG Shunan, MAO Junzhou, HAN Dong, YU Lihuai   

  1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
  • Received:2017-12-29 Online:2018-06-20 Published:2018-06-15

Abstract:

The aim of this study was to investigate the effects of Enterococcus faecium on the production performance,immune organ indexes and blood lipid metabolism-related indexes in AA broilers,and explore the feasibility of the application of Enterococcus faecium replaced antibiotics in broiler diet and its optimal dosage.600 1-day-old AA male broilers with 50 g body weight were chosen and randomly allocated into 5 groups with 6 replicates per group and 20 AA broilers per replicate in a complete randomized design.The five groups were CON group (basal diet),ANT group (basal diet+0.1% chlortetracycline), LEF group (basal diet+50 mg/kg Enterococcus faecium),MEF group (basal diet+100 mg/kg Enterococcus faecium) and HEF group (basal diet+200 mg/kg Enterococcus faecium).The experiment was divided into two phases with the early stage was 1 to 21 d and the later period was 22 to 42 d.The results showed as follow:①There was no significant difference in the growth performance between experimental groups and CON group (P>0.05).In the whole period,the mortality of AA broiler in MEF and HEF groups was the lowest.②In the later stage of feeding,compared with the CON group,the thymus index of MEF group was significantly increased (P<0.05),while the spleen index had a tendency to increase (0.05 < P < 0.1).③In the early stage, compared with CON and ANT groups,the content of TC in serum of LEF and HEF groups was extremely significantly decreased (P<0.01),and compared with the ANT group,the content of TG in serum of LEF and MEF groups was extremely significantly decreased (P<0.01);Compared with the CON group,the HDL content were extremely significantly increased in MEF and HEF groups in serum (P<0.05), and compared with the ANT group,the LDL content in serum of groups adding Enterococcus faecium were extremely significantly decreased (P<0.01).In the later stage, compared with the CON and ANT groups,the TG content in serum of LEF group was extremely significantly decreased (P<0.01),while HDL content in LEF and MEF groups was extremely significantly increased (P<0.01).It was concluded that Enterococcus faecium would be an ideal feed additive to reduce mortality rate to a certain extent,and promote the development of immune organ and decrease blood lipids.And the optimum supplemental level of Enterococcus faecium was 100 mg/kg under the conditions of this experiment.

Key words: Enterococcus faecium; AA broilers; production performance; mortality; immune organ development; blood lipids

CLC Number: