Determination of lactaction performance and animal behavior in characteristics of raienian cashmere goat using machine milking

Document Type : Research Paper

Authors

1 M Sc. Students of Genetics and Animal Breeding, University of Tabriz, Iran

2 Assistant Professor, Department of Animal Science, University of Tabriz, Iran

3 Professor, Department of Animal Science, University of Tabriz, Iran

4 M Sc. Student of Genetics and Animal Breeding, University of Tabriz, Iran

Abstract

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 testday
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.

Keywords

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