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| The nutrient requirement of the late-pregnant cows increases for three or two months before expected calving. One of the efforts to meet the nutrient requirement of the late-pregnant cows is by providing flushing diets. The study aims to reveal the effect of urea-impregnated zeolite inclusion in flushing diets on the blood mineral and hematological profiles of three-year-old pregnant Pasundan cows under extensive grazing. The study adopted a completely randomized design experiment with three treatments and five replicates. All the fifteen late-pregnant (two – three months before calving) cows were randomly assigned to three treatments (five cows per treatment) as follows: 1) extensive grazing, 2) extensive grazing and fed flushing diets without urea-impregnated zeolite supplementation (flushing-1), 3) extensive grazing and fed flushing diets supplemented urea-impregnated zeolite (flushing-2). The result showed that flushing diets increased blood Ca (from 2.95 ± 0.11 g/dL in extensive grazing to 3.95 ± 0.55 g/dL in extensive grazing + flushing-1 or to 4.28 ± 0.24 g/dL in in extensive grazing + flushing-2; P<0.05) and Fe (from 0.37 ± 0.08 g/dL in extensive grazing to 1.38 ± 0.42 mg/L in extensive grazing + flushing-1 or to 1.43 ± 0.36 mg/L in in extensive grazing + flushing-2; P<0.05), but not for Zn and Cr concentrations. There were negative correlations between Zn and Ca or Zn and Fe. Flushing-2 diets increased red blood cells, hemoglobin, platelet hematocrit, and platelet distribution width concentration. Both flushing diets decreased mean corpuscular hemoglobin. None of the flushing diets affected white blood cells, lymphocyte, monocyte, neutrophil, and eosinophil. However, flushing-2 diets decreased its basophil count. In conclusion, late-pregnant Pasundan cows raised in the extensive grazing show calcium and iron mineral deficiencies. Inclusion of urea-impregnated zeolite in flushing diets to the late-pregnant cows under extensive grazing improves the calcium and iron availability and most hematological parameters.

Flushing Diets Influence on Blood Mineral and Haematological Profile of Late-Pregnant Cows under Extensive Grazing