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A study was carried out to find the influence of different dietary protein levels onserum biochemical parameters of dairy cows during the transition period. Twenty cross bred cows,three weeks prior to their expected date of calving were selected from University Livestock Farmand Fodder Research and Development Scheme (ULF&amp;FRDS), College of Veterinary and AnimalSciences, Mannuthy as experimental animals. The cows were randomly allotted to two dietarytreatments – T1 (12 per cent CP (crude protein) TMR (Total Mixed Ration)) and T2 (14 per centCP TMR). After calving, half of the animals in T1 were allotted to T3 (16 per cent CP TMR) andremaining half to T4 (18 per cent CP TMR). Similarly half of the animals in T2 were allotted toT3 and remaining half to T4. All these rations were iso-caloric. The feeding trial was carried outfor a period of 3 weeks prepartum and 45 days postpartum. The serum biochemical parameterssuch as serum glucose levels were significantly higher (p&lt;0.05) for groups receiving treatmentsT2 &amp; T4 (84.87±2.64 mg/dL) and total protein levels were significantly lower for groups receivingtreatments T1 and T3and the levels of all other biochemical parameters under observation remainedunaffected in all treatment combinations, but the values of NEFA (non-esterified fatty acids) werebelow the normal range. Furthermore, there was no occurrence of metabolic diseases in any of thetreatment groups, indicating that dietary treatments were sufficient to meet the requirement of theanimals. Dietary protein levels did not have any significant effect on serum metabolites studied inthe present work.

Influence of different levels of dietary protein on serum biochemical parameters of dairy cows during the transition period