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Dietary Metabolizable Energy Responses in Yellow-Feathered Broiler Chickens from 29 to 56 d

文献类型： 外文期刊

作者： El-Senousey, HebatAllah Kasem 1 ; Wang, Weiwei 1 ; Wang, Yibing 1 ; Fan, Qiuli 1 ; Fouad, Ahmed Mohamed 1 ; Lin, Xi 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Anim Sci,Minist Agr, State Key Lab Livestock & Poultry Breeding,Guangd, Guangdong Key Lab Anim Breeding & Nutr,Key Lab An, Guangzhou 510640, Peoples R China

2.Cairo Univ, Fac Agr, Dept Anim Prod, Giza 12613, Egypt

3.Acad State Adm Grain, Beijing 100037, Peoples R China

关键词： carcass trait; fat deposition; metabolizable energy; performance; yellow-feathered broiler

期刊名称：JOURNAL OF APPLIED POULTRY RESEARCH （ 影响因子：1.178； 五年影响因子：1.572 ）

ISSN： 1056-6171

年卷期： 2019 年 28 卷 4 期

页码：

收录情况： SCI

摘要： In this study, the metabolizable energy (ME) requirements were determined for Chinese yellow-feathered chickens aged from 29 to 56 d. In total, 1,200 29-d-old male yellow-feathered broilers were randomly assigned to 5 dietary treatments with 6 replicates each of 40 birds. Birds were fed 5 levels of dietary ME (2,799, 2,897, 2,997, 3,098, and 3,198 kcal ME/kg diet). Broilers that received high-energy diets had a higher (P < 0.05) final body weight, average daily gain (ADG), and average daily ME intake, and a lower (P < 0.05) feed conversion ratio (FCR) compared with those fed reduced energy diets. Increasing the dietary energy level had no significant influence on the carcass traits (P > 0.05), whereas the abdominal fat percentage and thigh intramuscular fat percentage increased significantly. The retention of energy and protein increased (P < 0.05) as the dietary energy concentration increased. Increasing the dietary energy level had no significant effect (P > 0.05) on the energy, protein, and fat contents in the whole body. The plasma concentrations of total cholesterol and total triglyceride were not (P > 0.05) affected by the dietary energy concentration but the plasma concentration of uric acid increased significantly. According to broken-line regression analysis, the recommended dietary ME levels that maximized ADG, optimized FCR, and minimized the deposition of abdominal fat (%) in yellow-feathered broiler chickens aged from 29 to 56 d were 3,198 kcal, 3,213 kcal, and 2,920 kcal ME/kg, respectively.

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