University of Khartoum

Influence of season and pregnancy on thermal and haemotological responses of crossbred dairy cows in a tropical environment

Influence of season and pregnancy on thermal and haemotological responses of crossbred dairy cows in a tropical environment

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Title: Influence of season and pregnancy on thermal and haemotological responses of crossbred dairy cows in a tropical environment
Author: Abdelatif, Abdalla Mohamed; Alameen, Ahmed Omer
Abstract: Abstract: The objective of this study was to evaluate the effects of season (summer vs winter) and stage of pregnancy on thermoregulation and haematological responses of crossbred dairy cows (Holstein-Friesian X Zebu) under tropical conditions. The rectal temperature (T ) and respiration rate (RR) were significantly higher r during summer at all stages of pregnancy. There was significant increase in Tr and RR with the advance of pregnancy in summer. Summer was associated with significantly lower packed cell volume (PCV) and haemoglobin (Hb) concentration in non pregnant cows. The PCV and Hb concentration tended to increase with the advance in pregnancy course in both seasons. The total leukocyte count (TLC) was significantly higher only in early pregnancy in winter. Environmental and nutritional measures should be adopted for alleviation of environmental stress in dairy farms.
URI: http://khartoumspace.uofk.edu/123456789/21860


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