China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (5): 1360-1372.doi: 10.16431/j.cnki.1671-7236.2020.05.009

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Probiotics,Oligomeric Chitosan,Acidulant and Complex Enzymes on Growth Performance,Immune Function,Carcass Traits and Meat Quality of Yellow-feathered Chicken Aged from 1 to 66 Days Old

FAN Qiuli, JIANG Shouqun, GOU Zhongyong, LI Long, LIN Xiajing, WANG Yibing, CHEN Fang   

  1. Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangdong Public Laboratory of Animal Breeding and Nutrition, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture and Rural Affairs, State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
  • Online:2020-05-20 Published:2020-05-18

Abstract: The aim of this experiment was to study the effects of probiotics,oligomeric chitosan and acidulant use alone or in combination with complex enzymes on growth performance,immune organ index,carcass traits and meat quality of Yellow-feathered chicken aged from 1 to 66 days old.1 440 1 day old rapidly growing Lingnan Yellow-feathered male chicken were randomly assigned into 8 groups according body weight:Control group (antibiotic-free),antibiotic group (225 mg/kg aureomycin+200 mg/kg eramycin),probiotics 1 group (500 mg/kg Bacillus subtilis+200 mg/kg Lactobacillus+1 000 mg/kg active yeast),probiotics 2 group (200 mg/kg mixed bacteria product),oligomeric chitosan group (50 mg/kg oligomeric chitosan),acidulant group (2 000 mg/kg benzoic acid+2 000 mg/kg citric acid),antibiotic-free combination 1 group (50 mg/kg oligomeric chitosan+1 000 mg/kg acidulant+500 mg/kg complex enzyme),antibiotic-free combination 2 group (probiotics 1 group+antibiotic-free combination 1 group),each group consisted of 6 replicates with 30 broilers.The experiment was carried out in three stages,and the experimental period was 66 days.The results showed that:1 to 21 days,compared with control group,the feed/gain ratio (F/G) of oligomeric chitosan and antibiotic-free combination 1 groups was significantly reduced (P<0.05).Compared with antibiotic group,the body weight (BW) and average daily gain (ADG) of probiotics 1 and 2 groups were significantly decreased,ADG of antibiotic-free combination 2 group was significantly decreased,and F/G of probiotics 1 and antibiotic-free combination 2 groups was significantly increased (P<0.05).The thymus index of oligomeric chitosan and antibiotic-free combination 1 groups was higher than that of control and antibiotic groups (P>0.05).The IgG content in plasma of antibiotic-free combination 1 group was higher than that of antibiotic group (P>0.05),and significantly higher than that of control group (P<0.05).The IgM contents in plasma of other groups except acidulant group were significantly higher than that of control and antibiotic groups (P<0.05).22 to 42 days,BW and ADG of probiotics 1,oligomeric chitosan and antibiotic-free combination 1 and 2 groups were higher than that of antibiotic group,and ADG of oligomeric chitosan group was significantly higher than that of antibiotic group (P<0.05),F/G of probiotics 1,oligomeric chitosan and antibiotic-free combination 1 groups were lower than that of antibiotic group (P>0.05).Different combinations without antibiotic had no significant effects on immune organ index and plasma biochemical parameters (P>0.05).43 to 66 days,different combinations without antibiotic had no significant effects on growth performance and immune organ index (P>0.05).The IgM contents in plasma of probiotics 1,oligomeric chitosan,antibiotic-free combination 1 and 2 groups were higher than that of antibiotic group (P>0.05),and significantly higher than that of control group (P<0.05).The abdominal fat percentage of probiotics 2 and antibiotic-free combination 1 and 2 groups were lower than that of antibiotic group (P>0.05),which of acidulant group was lower than that of control group (P>0.05),and significantly lower than that of antibiotic group (P<0.05).L*45 min value of meat of probiotics 2 and antibiotic-free combination 1 and 2 groups were lower than that of antibiotic group (P>0.05),which of oligomeric chitosan group was lower than that of control group (P>0.05),and significantly lower than that of antibiotic group (P<0.05).According to the results of growth performance,immune function,carcass traits and meat quality in three stages of this study,it was recommended to add 50 mg/kg oligomeric chitosan,1 000 mg/kg acidulant and 500 mg/kg complex enzymes in the same time to basic diet instead of antibiotic of rapidly growing Yellow-feathered male chicken aged from 1 to 66 days old could improve the growth performance,immune function,carcass performance and meat quality.

Key words: Yellow-feathered chicken; growth performance; immune function; carcass traits; meat quality

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