Poultry Nutrition

Crude Protein Deposition and Requirement of Luxi Game Chickens Aged 1 to 12 Weeks

  • ZHANG Xianglun ,
  • JIANG Shuzhen ,
  • YANG Zaibin ,
  • YANG Weiren ,
  • ZHANG Guiguo ,
  • DOU Wenjie ,
  • CHEN Guanjun ,
  • GAO Xiang
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  • 1. College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China;
    2. Chinese Game Chickens Breeding Farm, Heze 274600, China

Received date: 2013-05-18

  Online published: 2013-10-27

Abstract

This experiment was conducted to study crude protein (CP) requirement of Luxi game chickens aged 1 to 12 weeks. A total of 600 one-day-old Luxi game chickens were randomly divided into 5 groups with 6 replicates per group and 20 chickens per replicate. The feeding period was divided into two stages: 1 to 6 and 7 to 12 weeks of age. The experiment adopted a single factor design and chickens in the five groups were fed the experimental diets with different CP levels. At the end of 6 and 12 weeks of age, one bird from each replicate was slaughtered and samples were collected for analyzing body composition. The results showed as follows: dietary CP level significantly affected the average daily gain (ADG), the ratio of feed to gain (F/G), consumed protein for weight gain per gram, protein deposition and deposition rate of chickens aged 1 to 6 weeks (P<0.05), also significantly affected the ADG, F/G and consumed protein for weight gain per gram of chickens aged 7 to 12 weeks (P<0.05). Crude protein intake (CPI) and average daily gain (△W) were regarded as dependent variable and independent variable, respectively, along with metabolic weight in each stage, and then linear regressions were made. The regression equations of CP requirement (CPR) showed as follows: 1 to 6 weeks of age, CPR=1.17W0.75+370.87△W; 7 to 12 weeks of age, CPR=1.20W0.75+578.97△W. In conclusion, dietary CP requirements for chickens aged 1 to 6 and 7 to 12 weeks are 18.55% and 17.39% according to the average daily feed intake of each stage, respectively.

Cite this article

ZHANG Xianglun , JIANG Shuzhen , YANG Zaibin , YANG Weiren , ZHANG Guiguo , DOU Wenjie , CHEN Guanjun , GAO Xiang . Crude Protein Deposition and Requirement of Luxi Game Chickens Aged 1 to 12 Weeks[J]. Chinese Journal of Animal Nutrition, 2013 , 25(11) : 2583 -2590 . DOI: 10.3969/j.issn.1006-267x.2013.11.011

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