Impact of using glucogenic precursors and mineral supplements for prevention of metabolic disorders of Holstein cows at parturition

The objectives of this study were to examine whether drenching or mixed with total mixed ration (TMR) of glucogenic and mineral supplements can prevent metabolic disorders of Holstein fresh cows. Multiparous cows (n= 24), second lactating cows (n = 24), and first lactating cows (n=24) were used in a completely randomized block design, immediately after parturition and for 3 weeks experimental period. The treatments used were: 1) the control treatment that without any addition on water or TMR (CONT), 2) drenching treatment (DRCH) that include: 40 liter water contained 2 kg of the glucogenic and mineral supplements drenched to cows in two equal meals, 3) feeding treatment (FEED) contained two kg of the glucogenic and mineral supplements mixed with TMR, 4) compound diet (DRFD ), 20 liter water contained 1 kg of glucogenic and mineral supplements drenched to cows plus 1 kg of these materials mixed in the TMR. DRCH treatment had positive effects on negative energy balance and plasma NEFA and BHBA concentrations. Plasma glucose had increased significantly by treatments (P<0.05). Time duration of placenta to fall was significantly lower in DRCH treatment than the other treatments (P<0.05). Addition of these glucogenic precursors and minerals on water of fresh cows, resulted in optimize animal metabolic status in postpartum period and reduced duration of falling of placenta. So it can be concluded that drenching of glugenic and mineral supplements at calving improved the cows' health and prevented the metabolic disorders of parturition.