scholarly journals Effects of Dietary Crude Protein, Electrolyte Balance, and Photoperiod on Growth of Broiler Chickens

1987 ◽  
Vol 66 (2) ◽  
pp. 299-305 ◽  
Author(s):  
ADESINA A. ADEKUNMISI ◽  
KELLY R. ROBBINS
Keyword(s):  
Broiler Chickens ◽  
Crude Protein ◽  
Electrolyte Balance ◽  
Dietary Crude Protein

scholarly journals Protein and energy relationships in the broiler chicken

1993 ◽  
Vol 70 (3) ◽  
pp. 667-678 ◽  
Author(s):  
R. W. Rosebrough ◽  
J. P. McMurtry
Keyword(s):  
Broiler Chickens ◽  
Crude Protein ◽  
Broiler Chicken ◽  
Protein Levels ◽  
Low Protein ◽  
Dietary Crude Protein ◽  
Energy Relationships ◽  
Limiting Amino Acid ◽  
Limiting Amino Acids

Male broiler chickens growing from 7 to 35d were fed on a diet containing 150g crude protein (N × 6·25)/kg diet supplemented with lysine to equal that in diets containing 166, 183 and 200g crude protein/kg diet (Expt 1). A second group of male broiler chickens growing over the same period were fed on a diet containing 120g crude protein/kg supplemented with lysine, arginine, tryptophan, threonine and isoleucine equal to that in diets containing 144, 172 and 200g crude protein/kg diet (Expt 2). Growth was improved by lysine supplementation but not to the level attained by feeding 200g crude protein/kg (Expt 1). Lysine, arginine, tryptophan, threonine and isoleucine supplementation of a low-protein diet also improved growth, but growth again fell short of that attained by feeding a diet containing 200g crude protein/kg. Plasma insulin-like growth factor-1 and thyroxine concentrations increased and triiodothyronine decreased as the crude protein level increased from 150 to 200g/kg diet. Supplemental lysine did not affect plasma levels of these hormones. Although dietary crude protein levels noticeably changed rates ofin vitrolipogenesis, changing either the level of a single limiting amino acid or the levels of several limiting amino acids did not change lipogenesis.

scholarly journals Effect of varying dietary crude protein and metabolizable energy levels on leg abnormalities and performance in broiler chickens

2021 ◽  
Author(s):  
Leodan T Rodríguez-Ortega ◽  
Alejandro Rodríguez-Ortega ◽  
Fredy Mera-Zuñiga ◽  
Arturo Pro-Martínez ◽  
Filogonio J Hernández-Guzmán ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Crude Protein ◽  
Energy Levels ◽  
Metabolizable Energy ◽  
Dietary Crude Protein ◽  
And Performance

scholarly journals REPLACEMENT VALUE OF POULTRY VISCERAL OFFAL MEAL IN THE DIET OF BROILER CHICKENS

2021 ◽  
Vol 24 (2) ◽  
pp. 116-123
Author(s):  
S. O. O. Oyewole ◽  
R. I. Salami
Keyword(s):  
Feed Intake ◽  
Broiler Chickens ◽  
Crude Protein ◽  
Fish Meal ◽  
Control Diet ◽  
Feed Conversion ◽  
Dietary Crude Protein ◽  
Weight Gains ◽  
The Mean ◽  
Finisher Diets

An experiment was conducted to evaluate the replacement value of poultry visceral offal meal (PVOM) substituting for fish meal (FM) on an equal protein basis in the diets of unsexed Ross-strain broiler chickens from day-old to 8 weeks of age. One hundred and fifty birds were allotted in groups of 10 into 15 equidimensional floor pens with floor space of 0.189m2 per bird. There were three replicates per treatment diet, with 10 birds per pen serving as a replicate. Five treatment diets, each for the starter and finisher phases of 5 and 3-week duration respectively were fed ad libitum. Diet A (control) contained 8% FM which was gradually replaced with PVOM at 2,3,4,6,6,90 and 9.20% in diets B, C, D and E respectively for both phases. All the diets were isocaloric (ca 12MJ   ME/kg) for both phases and isonitrogenous with 23 and 20% dietary crude protein contents for the starter and finisher diets respectively. Feed intake and feed conversion rations (FCR) were similar (P >0.05) on all diets in support of complete substitution. However , weight gain for 8 weeks on the control diet was better (P <0.05) than those on FM/PVOM- and PVOM-diets whose weight gains were similar (P < 0.05). The mean feed intake values of 4.031, 3.936, 3.760, 3.870 and 3.715 kg/bird were obtained for birds receiving diets A,B,C,D and E respectively while the equivalent FCRs were 2.326, 2.352, 2.233, 2.326 and 2.340. The mean weight gains for birds on diets A,B,C,D and E for 8weeks were 1.824, 1.688, 1.689, 1.676 and 1.590 kg/bird respectively. The dressed weight and weight of back, drumsticks, things and wings were similar (P >0.05) for all diets in favour of complete substitution of FM with PVOM. Mean dressing percentages were 58.24 to 69.07% . It is concluded that PVOM could replace FM completely in broiler diets.   

scholarly journals Protein and enery relationships in the broiler chicken 12. Dietary protein and triidothyronine (T3) effects on the response of broilers to isoproterenol and cyclic adenosine monophosphate in vitro

1995 ◽  
Vol 73 (1) ◽  
pp. 73-85 ◽  
Author(s):  
R.W. Rosebrough ◽  
A.D. Mitchell
Keyword(s):  
Protein Level ◽  
Broiler Chickens ◽  
Crude Protein ◽  
Adenosine Monophosphate ◽  
Chemical Extraction ◽  
Dietary Control ◽  
Acetate Incorporation ◽  
Dietary Crude Protein ◽  
Crude Protein Level

Indian River male broiler chickens (7-d-old) were fed on diets containing 120, 210 or 300 g crude protein/kg + 0 or 1 mg triiodothyronine (T3)/kg diet (Expt 1) and 120, 150, 180 or 210 g crude protein/kg +0 or 1 mg T3/kg diet (Expt 2) to determine the effects of crude protein level and T3 on growth and metabolism. Body composition of chickens was determined by a combination of dissection of muscle and abdominal fat pads, and chemical extraction (Expt 1). In vitro lipogenesis (IVL) was determined in both experiments by incubating liver explants for 2 h at 37° in the presence of 10-4 M-dibutyryl cyclic AMP (cAMP) or 10-5 M isoproterenol (ISO) and 10-2 M-[2-14C]acetate. Acetate incorporation into total lipid was an indication of IVL. Activity ratios for each of these additions relative to control (?cAMP?ISO) were calculated to ascertain basal ν. inhibited rates of IVL. The relative muscle mass was increased by increasing crude protein from 120 to 210 g/kg diet but not from 210 to 300 g/kg diet. Dietary T3 decreased total body lipid regardless of the dietary crude-protein level. Increasing dietary crude protein decreased (P<0.05) basal IVL (?cAMP? ISO) but not IVL (+ cAMP). Dietary T3 decreased basal IVL in birds fed on the diets containing 120 and 210 g crude protein/kg but had little effect on the two inhibited states of lipogenesis (+ cAMP or +ISO). The component of lipogenesis sensitive to in vitro inhibition is also the component under dietary control.

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