MANAGEMENT OF POSTPARTUM ANOESTRUS AND REPEAT BREEDING IN CROSSBRED CATTLE THROUGH NUTRITIONAL AND THERAPEUTIC INTERVENTIONS
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Date
2019-01
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College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati
Abstract
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.