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Suitable Energy Level and Growth Rule of Luxi Game Chickens

Dou Wenji

Chinese Journal of Animal Nutrition(2013)

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摘要
This experiment was conducted to study the effects of dietary metabolizable energy(ME) level on growth performance and formulate the growth model of Luxi game chickens. A total of 1 000 one-day-old Luxi game chickens were randomly divided into 5 groups with 4 replicates per group and 50 chickens per replicate.The feeding period was divided into two stages: 1 to 6 and 7 to 20 weeks of age. The dietary ME levels were as follows: 1 to 6 weeks of age,11.98,12.19,12.38,12.62 and 12.81 M J / kg; 7 to 20 weeks of age,11.63,11.82,12.03,12.25 and 12.45 MJ/kg. The results showed as follows: 1) average daily feed intake(ADFI) and average daily gain of chickens were not significantly affected by dietary ME level aged from 1 to 20 weeks(P 0.05),while dietary ME level significantly affected feed to gain of chickens aged from 7 to 20 weeks(P 0.05),and the middle ME level group(1 to 6 weeks of age: 12.38 MJ/kg;7 to 20 weeks of age: 12.03 M J / kg) was the low est during whole stage. 2) From 1 to 20 weeks of age,the best fitting models of ADFI,body weight(BW) with age(t) as follows: ADFI =- 0.01 + 5.73 × t(R2= 0.982 7,P 0.000 1); BW = 1 607.60 /(1 + 22.53e- 0.27t)(R2= 0.996 7,P 0.000 1). In conclusion,according to the best feed to gain,the suitable ME level of Luxi game chickens aged from 1 to 6 and 7 to 20 weeks were12.38 and 12.03 M J / kg,respectively.
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