Abstract
Postpartum negative energy balance (NEB) in the dairy cattle is associated with delayed return to ovarian cyclicity and reduced fertility. Lactation significantly delayed postpartum follicular growth and ovulation. Low energy intake also had a delaying effect, especially when only the lactating animals were considered. The aim of the present study was to determine the effect of fatty acid supplementation on postpartum dairy cows on the basis of daily milk yield, and glucose level, blood urea nitrogen level, progesterone level, and resumption of first estrus cycle after calving. For this experiment 10 post-partum dairy Pabna cows (locally popular) were taken. Among the cows 5 kept as controlled and rest of the 5 treated with essential fatty acid with conjugated linoleic acid (CLA). There was no significant difference found in blood glucose level and blood urea nitrogen level, although in the treated group blood glucose level was higher (4.14mmol/L) than the controlled group (2.85mmol/L). However, those cows, that received fat supplemented feed, significantly produce (p
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