نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد ژنتیک و اصلاح دام گروه علوم دامی دانشگاه تبریز
2 استادیار ژنتیک و اصلاح دام گروه علوم دامی دانشگاه تبریز
3 استاد ژنتیک و اصلاح دام گروه علوم دامی دانشگاه تبریز
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
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.
کلیدواژه‌ها [English]
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