Abstract:
This study was conducted in Azahir Company for
Agricultural production and processing at Albagair Area in
northern region of Al-Gazeera State, during the period from
November 2004 to October 2005 in Holstein/ Friesian cows.
The objective of this study is to evaluate the effect of number
of milking on yield and composition.
Fifteen Cows were used in the observation in the same
age and lactation they were milked two-times /day six months
and three-times/day another six months ,milk samples
subjected to chemical analysis in the laboratory of Animal
Production Department- College of Agricultural Studies –
Sudan University of Science and Technology. To compare the
results of the analysis we used T-test in SPSS version 12 was
used.
The results indicated that there were significant
differences (P> 0.01) between milking two-times/day and
three-times milking/ day. The production is (2920.80 ± 334,
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3371 ± 162) liters respectively, while the milk fat is reduction
and showed highly significant differences (P>0.01) with
means (3.62 ± 0.08, 3.28 ± 0.11) between two-times/day and
three-times milking/ day, respectively.
Although, protein content showed no significant differences
between two-times/day and three-times milking/ day with
means (3.19 ± 0.23, 3.27 ± 0.26) respectively. The total solid
demonstrated significant differences (p> 0.05) with means
(12.66 ± 0.45, 12.26 ± 0.55) between milking two-times and
three-times/day. The solid not fat “SNF” contents have
significant differences with means (8.90 ± 0.41, 8.58 ± 0.30)
for two-times/day and three-times milking a day respectively.
The values of ash content disclosed significant (p> 0.05) with
means (0.68 ± 0.08, 0.7 ± 0.06) between milking twotimes/
day and three times milking /day. The economical
benefit in two-times milking/day was low in labor, electricity
and additional services. Means production/day in two times
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and three times were16.2 and18.7 litre and the price cost /litre
56 and 53SD respectively, this was due to the increasing on
the yield.
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