Effect of dietary protein and energy levels on performance of Native-Shanghai Chicken
1994
Prachya Prachyalak | Noppawan Chomchai | Thalearngsak Nonthanavongs (Petchaburi Animal Nutrition Research Center (Thailand))
Study on effects of dietary protein and energy levels on performances of native-shanghai chicken was conducted by using 240 one day old native-shanghai chicks as 3*2 factorial in CRD with 4 replications. The chicks were fed ad lib with three dietary protein levels which were 20, 18, 16 % for 0-6 weeks of age and 18, 16, 14 % for 6-12 weeks of age and two dietary energy levels (3,000 and 2,800 kcal/kg ME). The results indicated that increasing dietary protein levels improved growth rate and feed conversion ratio of the chicks (P0.05). The chicks fed low dietary energy level (2,800 kcal/kg ME) had better growth rate and feed intake than those fed 3,000 kcal/kg ME (P0.05), however, there were no statistically significant differences in feed conversion ratio. The native-shanghai chicks on the diet containing 20-18 percent protein and 2,800 kcal/kg ME had the best body weight and growth rate which were 1,470 grams and 17.02 grams/day, respectively. The chicks fed 20-18 percent protein and 3,000 kcal/kg ME had the best feed conversion ratio (2.98). Feed cost per gain of the chicks fed 16-14 percent protein and 2,800 kcal/kg ME was the lowest (17.42 baht/kg).
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