Age Difference in the Pattern of Growth Response to the Change in the Dietary Energy and Protein Levels

Yoshida, Minoru; HOSHIII, Hirosi; Morimoto, Hiroshi

doi:10.2141/jpsa.6.7

Cited by 2 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Multiple regression and response surface techniques have been used to investigate the relationships between dietary protein and either added fat (Nakhata and Anderson, 1982) or metabolisable energy (Yoshida et al, 1968(Yoshida et al, , 1969Pesti, 1982;Pesti and Fletcher, 1983) with regard to the growth and food utilisation of broilers. High correlations between metabolisable energy and added fat levels complicated these findings.…”

Section: Introductionmentioning

confidence: 99%

The response of growing broiler chickens to dietary contents of protein, energy And Added Fat

Pesti

Smith

1984

British Poultry Science

View full text Add to dashboard Cite

The results of 47 experiments with broilers over the period 1974 to 1983 were selected for regression analysis. Included were those dealing with the relationship of growth and food utilisation to content of dietary protein (DP), metabolisable energy (DME) and added fat (DAF) in conventional feedingstuffs. Significant correlations were found between DP and DME (0.50; P less than 0.01), DP and DAF (0.61; P less than 0.01), and DME and DAF (0.65; P less than 0.01) contents. Using multiple regression models, growth and food utilisation efficiency (FUE) were found to be dependent on the linear and quadratic effects of DME (r2 values = 0.67 and 0.64 respectively). Growth and FUE were also dependent on the linear and quadratic effects of DP (r2 values = 0.70 and 0.49 respectively). By including the effects of DME, DP and DAF in the gain and FUE models it was shown that growth and FUE were dependent on DME, DP and DAF (r2 values = 0.76 and 0.79 respectively). It was concluded that hypotheses concerning the broiler's response to DME and DAF were both correct but incomplete. DME, DP and DAF contents must all be known to predict accurately growth and FUE.

show abstract

Section: Introductionmentioning

confidence: 99%

The response of growing broiler chickens to dietary contents of protein, energy And Added Fat

Pesti

Smith

1984

British Poultry Science

View full text Add to dashboard Cite

show abstract

An Application of Response Surface Methodology to Research in Poultry Nutrition

1979

View full text Add to dashboard Cite

Response Surface Methodology (RSM) is an experimental procedure for exploring and examining the nature of responses obtained from the simultaneous variation of quantitative factors. The method has been used only to a limited extent in poultry research. Statistical procedures were discussed for fitting a response surface to experimental data. An outline was made of the mathematical process for finding the stationary point, yield at the stationary point and nature of the response surface. A poultry example was given which involved the investigation of the protein and energy requirements of Japanese quail. The advantage of RSM was shown when it was determined by RSM procedures that the optimum response for body weight was out of the exploratory region covered in the first trial. A second trial was then conducted based on the levels of protein and energy predicted to give an optimum body weight. Optimum responses were shown for both body weight and feed conversion. Examination of the responses by three dimensional figures and computer plotting of contours was shown. The RSM procedure appears to offer an efficient method for examining the requirements and relationships of nutrients for poultry.

show abstract

Age Difference in the Pattern of Growth Response to the Change in the Dietary Energy and Protein Levels

Cited by 2 publications

References 1 publication

The response of growing broiler chickens to dietary contents of protein, energy And Added Fat

The response of growing broiler chickens to dietary contents of protein, energy And Added Fat

An Application of Response Surface Methodology to Research in Poultry Nutrition

Contact Info

Product

Resources

About