Thumbnail Image

Theses

Browse

20191
Reset filters
Subject: Animal Reproduction, Gynaecology and Obstetrics × Author: DAS, ARUNODAY × End date: 2019 × Start date: 2016 × Type: Thesis × Thesis Type: Ph.D ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    MANAGEMENT OF POSTPARTUM ANOESTRUS AND REPEAT BREEDING IN CROSSBRED CATTLE THROUGH NUTRITIONAL AND THERAPEUTIC INTERVENTIONS
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2019-01) DAS, ARUNODAY; BISWAS, R. K.
    The relationship of managemental condition with infertility, reproductive status and incidence of different reproductive problems of crossbred cattle were studied in a few parts of Lower Brahmaputra Valley Agro-Climatic Zone of Assam. A total of seven nutritional and hormonal interventions and six nutritional and therapeutic interventions were used for addressing postpartum anoestrocity and repeat breeding in crossbred cattle respectively. The incidence of infertility was significantly (P<0.01) higher under poor as compared to good housing and feeding conditions. The mean age at puberty, age at first service, age at first calving, postpartum interval of oestrus and calving interval were significantly (P<0.05) higher in poor managemental condition as compared to good one. Among the reproductive disorders, post-partum anoestrus (19.75%) and repeat breeding with or without infection (17.73%) were most predominant in crossbred cattle. The response to different treatments was studied based on oestrus response, interval from treatment to onset of oestrus and conception rate in postpartum anoestrous cows. The response to treatment in case of repeat breeder cow was estimated on the basis of conception rate. The blood biochemical constituents, viz. IGF-1, oestrogen, progesterone, cortisol, T3, T4, calcium, inorganic phosphorus, zinc, magnesium, total protein and albumin were estimated before treatment, on day of oestrus and day 20 of oestrus in postpartum anoestrous cattle, and on day of oestrus, day of subsequent oestrus and day 20 of subsequent oestrus in repeat breeding crossbred cows for different interventions. The conception rate at induced oestrus of postpartum anoestrous cows in groups treated with Bypass fat, Probiotics, Injectable phosphorus, Area specific mineral mixture+ Bypass fat + Probiotics + Injectable phosphorus, Progesterone + eCG and Area specific mineral mixture + Bypass fat +Progesterone + eCG was 83.33, 66.67, 60.00, 83.33, 83.33 and 100.00 per cent respectively. Out of five nutritional interventions, Area specific mineral mixture + Bypass fat + Probiotics + Injectable phosphorus regime brought about the highest rate of oestrus induction and conception rate in postpartum crossbred cattle. Progesterone + eCG supplemented with Area specific mineral mixture + Bypass fat resulted in higher rate of oestrus induction, lower interval from the end of treatment to onset of oestrus and higher conception rate in postpartum anoestrous cows as compared to without supplementation. The conception rate in infectious and non-infectious repeat breeder crossbred cows following different treatment regimes was 60.00, 71.43, 85.71, 42.86, 83.33. 57.14, and 16.67 per cent in Intrauterine antibiotic, E. coli Lipopolysaccharide, Selenium + Vitamin E orally + E. coli Lipopolysaccharide i.u., Area specific mineral mixture + Bypass fat + Probiotics, GnRH + Injectable Progesterone + COX-2 inhibitor, AI+ hCG on day 0 and on day 10 of the oestrous cycle treatment regime and control group respectively. E. coli LPS intrauterine fortified with oral selenium + vitamin E, and GnRH + Injectable progesterone + COX-2 inhibitor were superior for treatment of infectious and non-infectious repeat breeder cows respectively.