Abstract
Laying hens of 51-week-old and chicks of 3-week-old were frozen and chopped into homogenious chicken-burger. An aliquot of the sample was taken for chemical analyses of moisture, fat, protein and gross energy.
The components of variance due to sampling error, σ2 and due to between-lot error, σL2 were estimated statistically from the data. The sampling error σ2 was found to be comparable to or somewhat larger than that of the error variance in chemical analysis of finely ground feed4). Therefore, the procedure of preparing the sample of carcass described in this paper is almost satisfactory.
Average of gross energy in carcass fat of 35 estimates and in dry lean carcass of 28 estimates were 9.33 and 4.74kcal/g, respectively. Difference between carcass energy determined directly by bomb-calorimeter and that calculated from carcass fat and dry lean carcass was -0.0003kcal/g in average, suggesting that the calculation from carcass fat and dry lean carcass with caloric value mentioned above is quite reliable.
