REPRODUCTIVE PERFORMANCE OF EARLY POSTPARTUM CROSSBRED COWS SUPLLEMENTED WITH BYPASS FAT AND SUBJECTED TO HORMONAL INDUCTION OF OESTRUS

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dc.contributor.advisorMetilda Joseph
dc.contributor.authorANI S.DAS
dc.date.accessioned2023-01-18T11:25:57Z
dc.date.available2023-01-18T11:25:57Z
dc.date.issued2018-11-30
dc.descriptionSubmitted in partial fulfillment of the requirement for the degree of Doctor of Philosophy in ANIMAL REPRODUCTION, GYNAECOLOGY AND OBSTETRICSen_US
dc.description.abstractPostpartum infertility due to negative energy balance is a major problem among the high producing cows of Kerala, incurring huge economic loss. The present study was aimed to evaluate the effect of supplementation of bypass fat on the reproduction and production parameters of high yielding crossbred cows with or without postpartum hormonal induction of oestrus and its techno-economics. The trial was conducted with four experimental groups of six cows each (GI – control, GII- 200 g bypass fat 90 days, GIII – 200g bypass fat daily + Ovsynch protocol on day 45postpartum, GIV – Ovsynch protocol alone). The animals in GII and GIII were observed to be superior in milk production parameters viz. peak yield (P<0.05), and days taken for attaining peak yield. Cessation of post-patum lochial discharge and its characteristics were normal in all groups. The animals in GII and GIII showed earlier post-partum oestrus compared to others (P<0.05). As per rectal examination and ultrasonographic findings, more number of animals in GII and GIII showed early resumption of ovarian cyclicity. The number of days taken for complete involution of uterus and reduction of uterine wall thickness as per ultrasonographic examination were significantly lower in those animals fed with bypass fat. With respect to various serum biochemical parameters, blood glucose and total cholesterol were significantly higher (P<0.01) in those animals fed with bypass fat. Blood urea nitrogen, non-esterified fatty acids and triglycerides were significantly lower (P<0.01) in bypass fat fed groups. (GII and GIII). The mean circulating blood progesterone level and serum insulin concentration were also significantly higher (P<0.05) in the animals fed with bypass fat. The conception rate was highest in GIII followed by GII. The study indicated that it is ideal to supplement bypass fat before attempting hormonal induction of oestrus in early postpartum cows for enhanced reproductive efficiency. The techno-economic analysis of study showed that bypass fat supplementation is a financially viable, eco-friendly and socially acceptable method for improving the production and reproduction parameters of the cows, thereby augmenting the farm income.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810192543
dc.keywordsREPRODUCTIVE PERFORMANCE, EARLY POSTPARTUM CROSSBRED COWS , BYPASS FAT AND SUBJECTED TO HORMONAL INDUCTION OF OESTRUS, Postpartum period in cows , Postpartum reproductive performance of cows, Postpartum changes in reproductive system, Vaginoscopy, Hormonal changes during postpartum period, Luteal characteristics, Negative energy balance (neb) , Bypass fat, . Importance of bypass fat feeding , Methods of protection of fats, Contradictory reports ,Ultrasonographic evaluation of uterus, Ultrasonography in bovine reproduction , Uterine involution, Factors affecting uterine involution and ovarian rebound, Post-partum complications , Suckling vs. milking , Parity, Nutrition , GnRH-PGF2α –GnRH (Ovsynch/ GPG) protocol , Blood biochemical constituents , Diagnostic threshold for pmn per cent, Blood urea nitrogen (BUN) , Non esterified fatty acid (NEFA) , Functional ovarian status , Post-partum resumption of ovarian cyclicity in cattle , Progesterone ,en_US
dc.language.isoEnglishen_US
dc.pages176 p.en_US
dc.publisherCOLLEGE OF VETERINARY AND ANIMAL SCIENCES MANNUTHY, THRISSURen_US
dc.research.problemEffect of bypass fat supplementation on reproductive performance of postpartum cows , Efficacy of hormonal induction of oestrus in postpartum cows supplemented with bypass fat, Techno-economic impact on supplementation of bypass fat and hormonal induction of oestrus in augmenting reproductive efficiencyen_US
dc.subVeterinary Gynaecology and Obstetricsen_US
dc.themeEARLY POSTPARTUM CROSSBRED COWS SUPLLEMENTED WITH BYPASS FAT AND SUBJECTED TO HORMONAL INDUCTION OF OESTRUSen_US
dc.these.typePh.Den_US
dc.titleREPRODUCTIVE PERFORMANCE OF EARLY POSTPARTUM CROSSBRED COWS SUPLLEMENTED WITH BYPASS FAT AND SUBJECTED TO HORMONAL INDUCTION OF OESTRUSen_US
dc.typeThesisen_US
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