Effect of hot dry summer tropical climate on forage intake and milk yield in Holstein–Friesian and indigenous zebu cows in Sudan |
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| Authors: | Muna Mahjoub M Ahmed Adam Ibrahim El Amin |
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| Institution: | aFaculty of Animal Production, Department of Animal Breed and Husbandry, P.O. Box 32, Khartoum North, Sudan;bMinistry of Agriculture, Natural and Animal Resources, P.O. Box 293, Niyala, Sudan |
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| Abstract: | The effects of dry summer ambient temperature on some physiological and productive responses were studied in an exotic European breed (Holstein–Friesian) and a local zebu breed (Butana ecotype) of cattle in Sudan. Rectal temperature and respiration rate were positively correlated, and dry matter intake and milk yield were negatively correlated with variation in ambient temperature. However, significant adverse effects on high ambient temperature were only observed in the exotic breed. |
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| Keywords: | ambient temperature dry matter intake milk yield cattle Sudan |
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