University of Khartoum

Effect of breed, parity and lactation stage on some blood metabolites in dairy cows in Sudan

Effect of breed, parity and lactation stage on some blood metabolites in dairy cows in Sudan

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Title: Effect of breed, parity and lactation stage on some blood metabolites in dairy cows in Sudan
Author: Elgabbani, Samah Yousif Suleiman
Abstract: The present study was conducted to investigate the effect of breed, parity order, lactation stage and their interactions on blood glucose, phosphorus and calcium levels. Thirty six lactating cows (18 crossbred and 18 pure Holstein Friesian) belonging to two farms in Khartoum State were selected. The cows in each group were divided into four groups according to parity order (first and fourth) and stage of lactation (early and mid lactation). Blood sampling was performed post milking and immediately analyzed. The results revealed that all tested metabolites fell within the normal range. The breed however was found to affect significantly (p< 0.5) the plasma phosphorus but neither glucose nor calcium. Glucose and phosphorus levels were higher in Holstein Friesian(47.58 ± 2.01 mg/dl, 5.56 ± 0.27 mg/dl ) compared to that for crossbred(46.54 mg/dl ± 2.01mg/dl, 4.58 ± 0.27mg/dl) , while plasma calcium level was higher in cross bred (8.57 ± 0.33 mg/dl) compared to that for Holstein Friesian (7.78 ± 0.33 mg/dl) . The lactation stage showed a non significant effect on the levels of the studied metabolites. Serum glucose and plasma calcium levels were higher in mid lactation while plasma phosphorus level was higher in early lactation (p > 0.05). Parity order also didn’t affect the level of the metabolites. The data analysis revealed that the interaction between breed and parity order didn’t significantly affect (p > 0.05) serum glucose and plasma calcium levels, while plasma phosphorus level was affected (p< 0.05). The interaction between breed and lactation stage didn’t affect the investigated metabolites. On the other hand, the interaction between parity order and lactation stage exerted a non significant effect on all investigated metabolites.
URI: http://khartoumspace.uofk.edu/123456789/22865


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