›› 2019, Vol. 46 ›› Issue (7): 1953-1961.doi: 10.16431/j.cnki.1671-7236.2019.07.009

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Different Levels of Fermented Cottonseed Meal on Growth Performance, Slaughter Performance and Serum Biochemical Indexes of Cobb Broilers

WEI Lianqing, NIU Junli, ZHAO Guanzheng, YU Jingzai, ZHANG Wenzhe, CHENG Hong, ZHANG Wenju, NIE Cunxi   

  1. College of Animal Science and Technology, Shihezi University, Shihezi 832000, China
  • Received:2019-01-23 Online:2019-07-20 Published:2019-07-22

Abstract:

The study was conducted to examine the effects of replacement of soybean meal with fermented cottonseed meal (FCM) at different levels on growth performance,slaughter performance,and serum biochemical indexes of Cobb broilers.240 one-day-old male Cobb broilers were randomly divided into four groups with six replicates per group and 10 chicks per replicate.Chicks in control group were fed basic diet without FCM,while that in experimental groups were fed experimental diets with 3%,6% and 9% FCM replacing soybean meal,respectively.The experiment was carried out in two stages:The early growth stage (1-21 d) and the late growth stage (21-42 d).At the beginning and end of each stage,the broilers were weighed and blood samples were collected,and the growth performance,slaughter performance and serum biochemical indexes of broilers at each stage were measured.The results showed that:①Compared with control group,the F/G of 1 to 21 d in experimental group significantly decreased (P<0.05),and the ADFI of 21 to 42 d in 9% FCM group was significantly decreased (P<0.05).②Compared with control group,the percentages of half-eviscerated yield,breast muscle and leg muscle at two stages were increased and subcutaneous fat thickness were significantly decreased (P<0.05).The chest and leg muscle percentages of 6% FCM group were significantly higher than those of the control group and 9% FCM group on 42 d (P<0.05).The dressing percentage of experimental group increased on 42 d and the differences between the 3% and 6% FCM groups and the control group were significant (P<0.05).③ At 21 days of age,the concentration of serum TG and GLU in experimental groups were decreased comparing with that in control group,while TP content had the converse trend,and the 6% group had the best effect.At 42 days of age,the concentration of serum Ca in experimental groups were increased.In conclusion,adding appropriate amount of FCM in diet could improve the growth performance and slaughter performance of Cobb broilers,reduce the contents of serum TG and GLU,and increase the contents of serum TP and Ca to some extent.

Key words: fermented cottonseed meal (FCM); Cobb broilers; growth performance; slaughter performance; serum biochemical indexes

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