S.A.H. Ali,1 Fawgia S. Sidding,2 Mahassin A. Mohamed1
and S.A. Mohamed2
1 Shukaba Animal Prodcation Research Station, Wad Medani South, Sudan
2 Department of Animal Science, Faculty of Agricultural Sciences, University
of Gezira, Sudan.
Summary
The present study involved three herds located in Wad Medani Gezira State, two governmental farms (ElShukaba and ElNisheasiba) and ElBashaer private farm. The objective was to evaluate the effect of breed, herd, parity and calving season on lactation yield, lactation length, dry period and calving interval. Data on 43 Kenana and 27 Butana cows were extracted from the herds record books during 1970/1998 and analysed using the computer SPSS program.The overall mean milk yield was 1330.5±48.6kg in 278.6±7.11 days, the dry period and calving interval were 200.0±12.2 and 487.3±15.5 days respectively.
Although the two breeds were statistically similar in the studied traits, but Butana cows were found to secure a significantly shorter dry period.
The yield inEl Bashaer herd was significantly higher than that of the other herds, the milking duration was longer and thedry period and calving interval were shorter.A progressive increase in milk yield concomitant with a systematic decresingtrendin dry period and calving interval was observed as parities advanced from the first to the third.
A better production performance was however, achieved by Butana compared with Kenana cows and by ElBashaer herd (a private sector vensure) compared with the Public ownership herds.
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