Title of article
Non-genetic factors affecting milk yield and composition of Holstein-Friesian cows nested within natural ecological regions of Zimbabwe
Author/Authors
Nyamushamba، G.B. نويسنده Faculty of Agriculture, Women’s University in Africa, P.O Box, MP 1222, Mt Pleasant, Harare, Zimbabwe. , , Tavirimirwa، B. نويسنده Department of Research and Specialist Services, Matopos Research Institute P Bag k5137, Bulawayo, Zimbabwe. , , Banana، N.Y.D. نويسنده Faculty of Natural Resources Management and Agriculture, Midlands State University, Gweru, Zimbabwe ,
Issue Information
روزنامه با شماره پیاپی 0 سال 2013
Pages
7
From page
102
To page
108
Abstract
Milk production is affected by genetic and non-genetic factors. Knowledge of these factors is essential for efficient management and accurate estimation of breeding values. The objective of this study was to establish and analyze non-genetic factors which affect milk production and composition in Holstein-Friesian cows. A total of 4 500 milk records from the Zimbabwe Dairy Services Agency (ZDSA) from 1999 to 2004, were used. Natural ecological region, month of calving and year of calving had significant (P < 0.05) effect on milk yield, protein and fat composition. Therefore, correction for environmental effects is necessary to increase accuracy of direct selection for milk yield and composition.
Journal title
Scientific Journal of Animal Science
Serial Year
2013
Journal title
Scientific Journal of Animal Science
Record number
1023601
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