
	International Journal of Poultry Science
	Year: 2004 \| Volume: 3 \| Issue: 9 \| Page No.: 563-569 DOI: 10.3923/ijps.2004.563.569

Growth Performance, Bone Mineralization, and Nutrient Retention Responses of Chicks to Dietary Crude Protein and Non-phytate Phosphorus Concentrations

Olayiwola Adeola and Jason Shervago Sands

Abstract: The objective of this study was to investigate possible interactions between dietary crude protein (CP) and phosphorus (P) in broiler chicks. Two CP levels including an adequate NRC-recommended 230 g/kg or an amino acid-supplemented reduced CP 180 g/kg and 4 level - 4.0, 4.5, 5.0, or 5.5 g of non-phytate P (NPP)/kg in a 2 X 4 factorial arrangement were fed to 6 replicate cages of 6 chicks per cage from 10 to 22 d of age. There were main effects of CP (P < 0.001) and NPP (P < 0.05) concentration on final body weight (FBW), body weight gain (BWG), and gain-to-feed ratio. There was a linear reduction (P < 0.05) in feed intake as dietary NPP level increased. Generally, FBW, BWG and FI were linearly reduced (P < 0.05) with increasing NPP. Gain-to-feed ratio was lower (P < 0.05) for chicks fed the AA-supplemented reduced CP diet than those fed the adequate protein diet. Tibia ash was increased linearly (P < 0.05) with increased dietary NPP, but was not affected by CP. There were both linear and quadratic effects (P < 0.05) of NPP on retention of dry matter and energy. At either CP level, retention of nitrogen and phosphorus was reduced (P < 0.05) with increase in dietary NPP. Retention of P was linearly reduced with increasing NPP concentration and highest in chicks fed the adequate CP diet. These results provide support for an integrated strategy for reducing manure N and P excretion by broiler chickens.

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How to cite this article:

Olayiwola Adeola and Jason Shervago Sands , 2004. Growth Performance, Bone Mineralization, and Nutrient Retention Responses of Chicks to Dietary Crude Protein and Non-phytate Phosphorus Concentrations. International Journal of Poultry Science, 3: 563-569.

DOI: 10.3923/ijps.2004.563.569

URL: https://scialert.net/abstract/?doi=ijps.2004.563.569

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