Prediction of whole-body composition from the whole-body dry matter percentage of three-week-old broiler chicks.
Whole carcasses of 3-wk-old broiler chicks from four independent experiments were analyzed for percentage of whole-body DM, ether extract, and CP. The percentage of whole-body ash was calculated by the difference among DM, ether extract, and CP. A linear relationship between percentage whole-body DM and percentage whole-body ether extract (P < 0.001; r2 = 0.798) was found, but no relationships were detected between percentage whole-body DM and percentage whole-body CP (P = 0.29; r2 = 0.010). The percentage of whole-body ash was moderately correlated with the percentage of whole-body DM (P = 0.04; r2 = 0.036). In conclusion, the percentage of whole-body ether extract of 3-wk-old broiler chicks can be predicted from the percentage of whole-body DM by using the prediction equation Y = 0.961x - 17.855. Neither the percentages of whole-body CP nor ash could be accurately predicted from the wholebody DM percentage.
Bregendahl
K
K
Department of Animal Science, Iowa State University, Ames 50011, USA. kbregend@uoguelph.ca
Sell
J L
JL
Zimmerman
D R
DR
D000818:Animals; D001823:Body Composition; D002241:Carbohydrates / Q000032:analysis; D002645:Chickens / Q000502:physiology*; D004032:Diet; D004986:Ether; D008297:Male; D008903:Minerals / Q000032:analysis; D011506:Proteins / Q000032:analysis; D012044:Regression Analysis; D013025:Glycine max; D003313:Zea mays
D002241:Carbohydrates; D008903:Minerals; D011506:Proteins; D004986:Ether