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Effect of different levels of feeding during the dry period on blood serum urea concentrations in dairy cows before calving and during lactation


, : Effect of different levels of feeding during the dry period on blood serum urea concentrations in dairy cows before calving and during lactation. Zivocisna Vyroba 36(3): 219-225

Black Pied cows, in groups of 6 each, maintained during the last 60 days before calving on a low (group 1) and a high (group 2) plane of nutrition or on a low level for 45 days and increasing gradually to the high level for the last 15 days before calving. Blood was taken 3 weeks and 1 week before calving and at intervals until the 13th week of lactation for estimation of serum urea concentration. Plane of nutrition was varied with different amounts of a commercial feed mixture.

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