تعیین ویژگی‌های شیردهی و رفتاری بز نژاد رایینی با کمک دستگاه شیردوشی ماشینی

This research was aimed to determine the lactaction performance and to study the animal behavior during milking in raienian cashmere goat using machine milking. the test-day milk records started at first week of lactation and then test-day milk records was recorded every two week and continued up to two months of lactation. the procedure used for the analysis of the test-day milk yield, milking rate and milking time was mixed model and for animal behavior during milking was categorical data and generalized linear models (catmod) in the sas software. average milk yeild was 787.16 gr per day two months lactation. the peak of milk yield was in the fifth week in lactation and mean (±se) of test-day milk yield in the peak yeild was 909±24 gr per day. the parity, latter size, stage of lactation, animal and animal weight had significant effects on test-day milk yield (p < 0. 05). the stage of lactation and animal have significant effects on milking rate and milking time (p < 0. 05). the stage of lactation and parity had significant effects on animal behavior during milking (p < 0. 05). mean (±se) of test-day milk yield in the peak yeild was 909±24 gram per day. mean (±se) of test-day milk yield for goats with two kids and goats with single kids were 856±38 and 738±26 gr per day, respectively. mean (±se) of test-day milk yield for goats of first lactation and goats of second lactation were 727±37 and 871±30 gram per day, respectively. average of milking rate and milking time of goats were 9.69 gr/sec and 87.35 sec, respectively.