Suitable Energy Level and Growth Rule of Luxi Game Chickens
Chinese Journal of Animal Nutrition(2013)
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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