RESEARCH PAPER

Comparative Study on Approach and Efficiency of Energy Distribution in Different Breeds and Different Ages of Broilers

  • XU Ying ,
  • BAN Zhibin ,
  • LIU Yongfa ,
  • LIU Xingbo ,
  • LI Lijia ,
  • QU Zihui ,
  • LI Baihao ,
  • LIANG Hao ,
  • YAN Xiaogang ,
  • CHEN Digang
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  • 1. Institute of Animal Nutrition and Feed, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, China;
    2. College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
    3. Beijing Dabeinong Science and Technology Group Co., Ltd., Beijing 100080, China

Received date: 2021-12-20

  Online published: 2022-07-14

Abstract

In this experiment, the open-circuit respiratory instrument with twelve chambers in parallel for poultry was used to determine the dietary energy conversion pathway of different chicken breeds in vivo, in order to explore the dietary energy utilization efficiency of different chicken breeds and chicken with different ages. Twenty 45-week-old Hy-Line Brown laying hens, 25-day-old Arbor Acres (AA) broilers and 14-day-old AA broilers were selected respectively in the experiment. Each breed was randomly divided into 8 replicates with 2 chickens per replicate. The experimental chickens were fed diets to meet their nutritional needs. The experiment was divided into 2 periods and each period lasted for 6 days, eight chickens of each species were randomly selected in each period. After weighing, every 2 chickens were put into the respiratory calorimeter chamber, and every 4 chambers were corresponding to one kind of chickens. Gas exchange was measured in the metabolic chamber for 6 days, including 3 days of adaptation period and 3 days of respiratory calorimetry. During respiratory calorimetry, feed intake was recorded and feces were collected by total feces collection method. The results showed as follows:the dietary energy in poultry decreases gradually. Compared with gross energy intake, the dietary energy distribution efficiency of Hy-Line Brown laying hens, 25-day-old AA broilers and 14-day-old AA broilers was AME 77.78%, 76.78% and 76.89%, respectively; NE 59.50%, 59.67% and 49.62%, respectively; RE 23.87%, 35.21% and 27.96%. In conclusion, different breeds of chickens have different dietary energy distribution efficiencies due to their own differences in dietary energy metabolism. The efficiency and direction of dietary energy distribution are different for chickens of the same breed at different age stages due to their different demands for nutrients.

Cite this article

XU Ying , BAN Zhibin , LIU Yongfa , LIU Xingbo , LI Lijia , QU Zihui , LI Baihao , LIANG Hao , YAN Xiaogang , CHEN Digang . Comparative Study on Approach and Efficiency of Energy Distribution in Different Breeds and Different Ages of Broilers[J]. Chinese Journal of Animal Nutrition, 2022 , 34(7) : 4313 -4321 . DOI: 10.3969/j.issn.1006-267x.2022.07.022

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