China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (8): 2943-2952.doi: 10.16431/j.cnki.1671-7236.2022.08.010

• Nutrition and Feed • Previous Articles     Next Articles

Study on Optimum Dietary Metabolizable Energy Level of Male Pheasants from 13 to 17 Weeks of Age

CHEN Lihong1, ZHAO Mengdi1, LIU Keyuan1, NING Haoran1, CUI Kai2, LI Guangyu2, SUN Weili1   

  1. 1. State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China;
    2. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China
  • Received:2022-02-18 Online:2022-08-05 Published:2022-07-21

Abstract: 【Objective】 This experiment was conducted to investigate the effects of dietary metabolizable energy level on the growth performance,nutrient apparent metabolic rate,energy utilization and serum biochemical indexes,and to clarify the optimum dietary metabolizable energy level of male pheasants aged from 13 to 17 weeks.【Method】 A total of 240 healthy male pheasants at 13 weeks of age with similar body weight of (734.63 g±18.03) g were randomly assigned into 4 groups with 6 replicates per group and 10 pheasants per replicate.A one-factor design was adopted in this study,dietary metabolizable energy levels were set as 11.30 (group Ⅰ),11.72 (group Ⅱ),12.14 (group Ⅲ) and 12.56 (group Ⅳ) MJ/kg,respectively.The pre-trial period lasted for 7 days and the trial period lasted for 35 days.【Result】 ① The average daily feed intake (ADFI) were extremely significantly affected by dietary metabolizable energy levels (P<0.01).The ADFI in group Ⅳ was extremely significantly lower than that in groups Ⅰ and Ⅱ (P<0.01).Dietary metabolizable energy levels had no significant effect on feed to gain ratio (F/G),and it was the lowest in group Ⅱ (P>0.05).② Dietary metabolizable energy levels had extremely significant effects on dry matter (DM) and ether extract (EE) apparent metabolic rates (P<0.01).Crude protein (CP) apparent metabolic rate was not significantly affected by dietary metabolizable energy levels,and it was the lowest in group Ⅱ (P>0.05).③ Dietary metabolizable energy levels had on significant effect on gross energy intake,gross energy in excreta and metabolizable energy intake (MEI) (P>0.05).Gross energy apparent metabolic rate in groups Ⅱ, Ⅲ and Ⅳ were extremely significantly higher than group Ⅰ (P<0.01).④ The contents of serum cholesterol (CHO),low density lipoprotein cholesterol (LDL-C) and glucose (GLU) were not significantly affected by dietary metabolizable energy levels (P>0.05).The content of triglyceride (TG) in group Ⅲ was extremely significantly higher than that in other groups (P<0.01),and the content of serum high density lipoprotein cholesterol (HDL-C) in group Ⅱ was extremely significantly higher than that in group Ⅰ (P<0.01).The contents of total protein (TP) in groups Ⅱ and Ⅲ were significantly higher than that in group Ⅰ (P<0.05),and the content of serum albumin (ALB) in group Ⅲ was significantly or extremely significantly higher than that in other groups (P<0.05 or P<0.01).【Conclusion】 Considering all the factors,the pheasants in group Ⅱ could get better average daily gain (ADG),F/G,higher apparent metabolic rates of nutrients,higher energy intake and energy utilization.The dietary metabolizable energy level in group Ⅱ (measured value was 12.30 MJ/kg) was suitable for male pheasants aged from 13 to 17 weeks.

Key words: metabolizable energy; male pheasant; growth performance; nutrient apparent metabolic rate; energy utilization; serum biochemical indexes

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