The Comparison of Different Lactation Curves Models in Damascus Goats

The shape of lactation curve for Damascus was estimated by fitting a gamma function to daily milk yields from monthly recording of 434 records lactations. The purpose of this study was to examine the models of lactation curve of purebred dairy goats and make some suggestions concerning appropriate mathematical model. R2 values obtained from model ( 3 ) were all greater than those found from other models (Model 1;and 2). Hence model (3) was seen to be superior to other models.