Vol. 3, Issue 1, Part A (2018)

Author(s): Navjot Singh Resum, Palneez Kour and Harbir Singh

Abstract: The present study was designed to evaluate the effect of vitamin E and selenium injected pre partum along with PGF_2α or Methylergometrine maleate administered after calving on postpartum reproductive and productive performance in cross bred dairy cows. A total of 40 pregnant animals in their last trimester were selected and divided into 4 Groups with 10 animals in each group. Animals in Group I, II and III were given two injections of vitamin E and selenium (Inj. Repronol, cadila pharmaceutical ltd.) 7 days apart (I^st injection given at 30-60 days before the expected date of calving), while animals in Group IV were kept as control. Animals in Group I and II were also administered with 2 ml PGF_2α (inj. Pragma, 500µg, I/M, Intas Pharmaceuticals ltd.) and 5 ml Methylergometrine maleate (Inj. Nexbolic, 5mg, I/M, Intas Pharmaceuticals ltd) respectively, immediately after calving. However, animals in group III and IV were given 10 ml NSS I/M just after parturition. The time required for expulsion of placenta, uterine involution, occurrence of I^st post-partum heat, conception rate were recorded. The placental expulsion period and uterine involution period was significant higher in Group IV as compare to Group I, II and III animals. Conception rate was observed higher in Group II (80%) animals followed by 70%, 50% and 40% in Group I, III and IV respectively and there was a non-significant increase in colostrum production, lactational yield, lactational length and mean calf birth weight in pre partum vitamin E-Se supplemented animals as compare to non-supplemented animals.