EFFECT OF LOW DIETARY CRUDE PROTEIN , METABOLIZABLE ENERGY AND IDEAL LEVELS OF AMINO ACIDS ON CARCASS CHARACTERISTICS AND SOME METABOLIC RESPONSE OF BROILERS. | ||||
| Journal of Productivity and Development | ||||
| Article 1, Volume 27, Issue 4, October 2022, Page 443-462 PDF (780.08 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpd.2022.287016 | ||||
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| Authors | ||||
Mohammed Abd El-Fatah  1; Mohamed Abdella1; Gamal Aly El-Deen El- sayaad1; Abdou Abdallah2; Gaafer El-Gendi1
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| 1Animal Production Department, Faculty of Agriculture, Benha University, Egypt | ||||
| 2Poultry Nutrition Department, Animal Production Research Institute, ARC, Egypt. | ||||
| Abstract | ||||
| This study was conducted to determine the response to low dietary crude protein and energy while supplementing ideal amino acids level on carcass characteristics and some metabolic response of broiler chicks. At one day old, 270 chicks randomly divided to 6 groups each with 45 chicks and 3 replicates of 15 birds as follows; T1: positive control (PC) with basal diet (BD) with recommended CP level and ME, T2: negative control (NC) fed BD with reduce 3% CP and 100 kcal than requirements); T3 and T4 were fed BD diet (reduce 3% CP) but supplemented incrementally with four and five AAs (Lys, Met, Thr, Trp and valin, respectively); T5 and T6 were fed NC but supplemented incrementally with four and five AAs (Lys, Met, Thr, Trp and valin, respectively). From 1 to 35 d of age, to cover the dietary requirements for each AA during periods. Results showed thattreatment applied had highly significant effect on absolute weight (AW) of carcass, liver and abdominal fat and relative weight (RW) of carcass, heart and gizzard, respectively. Birds of treatment (1) and (6) had the higher average of AW of carcass (1565.0 and 1465.0g) while RW of abdominal fat (0.0109 and 0.011%, respectively) compared with different treatments applied. Birds of treatment (2) and (4) showed the lowest AW, RW of abdominal fat (8.33,11.67g and 0.0057,0.0065%, respectively). Treatments applied had significant effect on plasma globulin , A/G ratio, ALT and AST all period. Birds of Treatment (6) had the higher average of plasma total protein (TP) (3.80 mg/dl) and globulin (1.91mg/dl) and lowest average of creatinine.. However T4, T1 showed the higher average of TG and VLDL (25.00, 24.00 mg/dl) and (5.00, 4.80 mg/dl, respectively). Conclusively, it can be recommended by decreasing CP 3 % and ME 100 kcal/kg diet without affecting carcass characteristics and metabolic response with supplemental (Lys, Met, Thr, Trp, and Val) to obtain the best performance of broiler diets. | ||||
| Keywords | ||||
| Key words: Broilers; Low crude protein; Low energy; Amino acids; Metabolic response | ||||
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