THE ROLE OF WOOL COAT IN RESISTANCE TO WATER SALINITY AND HEAT STRESS IN SHEEP | ||||
| Journal of Animal and Poultry Production | ||||
| Article 7, Volume 29, Issue 8, August 2004, Page 4487-4497 PDF (3.49 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2004.239411 | ||||
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| Authors | ||||
| W. Abd EI-Ghany,; A. H. Azzam | ||||
| Wool Production and Technology Department, Desert Research Center, Mataria, Cairo, Egypt | ||||
| Abstract | ||||
| This study was carried out at Maryout Research Station of the Desert Research Center, located 35km south west of Alexandria. The experimental period extended from the first of July to the middle of September 2000. Twenty adult Barki rams were equally divided into four groups. Two groups were exposed to solar radiation and the two other groups were under shade. One of the two exposed groups was offered tap water (0.3g/L TOS) and the second group was offered saline water (13.1 gIL TOS). The same respective order was done in the other shaded groups. Staple length (STL), fibre diameter (FO), fibre type ratio (FTR), cotting score (CS), coat depth (CD) and number of crimps/ern (CRS) were measured. Plasma aspartate aminotransaminase (AST) , alanine aminotransaminase (AL T), glucose (GLU) and haemoglobin (Hb) concentrations were determined. The present study showed that drinking saline water significantly (P<0.05) declined both of animal BW and plasma GLU, while it caused an increment in both of plasma Hb and activity of liver enzymes (AST and ALT). Exposure to solar radiation tended to significantly increase BW and liver enzymes, while it decreased plasma Hb, but it had non significant effect on plasma GLU. Wool CD and FD could dilute the harmful impact of salt and heat stresses on sheep. | ||||
| Keywords | ||||
| sheep; wool traits; heat stress; salinity; blood constituents | ||||
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