Effects of Breed and Growing Phase of Yellow-Feathered Broilers on Metabolizable Energy of Five Feed Ingredients
The objective of this study was to study the effects of breed and growing phase of yellow-feathered broilers on metabolizable energy(ME)of five feed ingredients.A single-factor completely randomized design was adopted with four treatments including T1:fast growing type yellow-feathered broilers(yellow footed par-tridge chickens)at starter phase;T2:fast growing type yellow-feathered broilers at grower-finisher phase;T3:slow growing type yellow-feathered broilers(Xueshan chickens)at starter phase;T4:slow growing type yellow-feathered broilers at grower-finisher phase.Each treatment contained 6 replicates of 4 chickens.A total of 144 yellow footed partridge chickens at 26 days or 47 days of age and 144 Xueshan chickens at 33 days or 61 days of age were selected to determine the apparent metabolizable energy(AME),nitrogen-corrected ap-parent metabolizable energy(AMEn)and CP metabolizability of corn-soybean meal type basal diet and five experimental diets including corn,wheat,soybean meal,peanut meal and corn gluten meal diets by the total excreta collection,and then to calculate the ME(including AME and AMEn)and metabolizability of energy(ME/GE,including AME/GE and AMEn/GE)of five feed ingredients including corn,wheat,soybean meal,peanut meal and corn gluten meal.The results showed that the AME and AMEn of the basal diet and five experimental diets in fast growing type yellow-feathered broilers were significantly lower than these in slow growing type yellow-feathered broilers(P＜0.05).Except peanut meal,the ME/GE and ME of four feed in-gredients were significantly lower in fast growing type yellow-feathered broilers than slow growing type yellow-feathered broilers(P＜0.05).The growing phase of fast growing yellow-feathered broilers had no significant effects on the AME and AMEn of the five experimental diets(P＞0.05).The AME and AMEn of corn diet were significantly greater in grower-finisher phase than those in starter phase of slow growing type yellow-feath-ered broilers(P＜0.05),while the growing phase had no significant effects on the AME and AMEn of other experimental diets(P＞0.05).The ME/GE and ME of soybean meal were significantly greater in grower-fin-isher phase than those in starter phase of fast growing type yellow-feathered broilers(P＜0.05),while the growing phase had no significant effects on the ME/GE and ME of other feed ingredients(P＞0.05).The growing phase had no significant effects on the ME/GE and ME of five feed ingredients in slow growing type yellow-feathered broilers(P＞0.05).These results indicate that ME of five experimental diets and four feed in-gredients are lower in fast growing type yellow-feathered broilers than slow growing yellow-feathered broilers,but the growing phase of the 2 breeds of broilers has no significant effect on the ME of most experimental diets and feed ingredients.[Chinese Journal of Animal Nutrition,2024,36(8):5013-5025]
万方数据
维普
