Bihar Agricultural University, Sabour established on 5th August, 2010 is a basic and strategic institution supporting more than 500 researchers and educationist towards imparting education at graduate and post graduate level, conducting basic, strategic, applied and adaptive research activities, ensuring effective transfer of technologies and capacity building of farmers and extension personnel. The university has 6 colleges (5 Agriculture and 1 Horticulture) and 12 research stations spread in 3 agro-ecological zones of Bihar. The University also has 21 KVKS established in 20 of the 25 districts falling under the jurisdiction of the University. The degree programmes of the university and its colleges have been accredited by ICAR in 2015-16. The university is also an ISO 9000:2008 certified organisation with International standard operating protocols for maintaining highest standards in teaching, research, extension and training.VisionThe Bihar Agricultural University was established with the objective of improving quality of life of people of state especially famers constituting more than two third of the population. Having set ultimate goal of benefitting society at large, the university intends to achieve it by imparting word-class need based agricultural education, research, extension and public service.
(Department of Veterinary Gynaecology and Obstetrics, BAU, Sabour, 2016-09) Kumar, Bhawesh; Chaudhary, S. K.
There is a great economic loss to a farmer caused by subdued behavioural estrus due to heat stress. The present study was conducted on 120 buffaloes in the summer months of Patna area. From this present study it was found that although buffalo is not a season breeder but it behaves like season breeder because of its susceptibility to heat stress. Its body coat colour, sparse hairs & less no.of sweat gland make it more susceptible to heat stress which leads to subdued estrus, silent heat, anaestrus & repeat breeding. It was found that in heat stress, blood cortisol level increases leading to adverse effect on hypothalamus pituitary-gonad axis and impair folliculogenesis. More recently blood cortisol level has been identified as one of the important markers of heat-stress in animal, the level being significantly elevated in animals subjected to heat stress. The present study was done to ameliorate the heat stressed buffalo through the strategic reduction of blood cortisol level & aided by progesterone priming.
From the findings of experiments, it can be proclaimed that the mitigating effect of high blood cortisol level on the intensity of heat can be ameliorated effectively by supplementation of gluconeogenic precursor to animals along with calcium, phosphorus and vitamin B complex supplementation which ensures effective utilization of glucose at the tissue level and not just the blood glucose level. Progesterone priming has been found to potentiate the effect of estrogen by increasing the sensitivity of the body. Progesterone priming and cortisol reduction either alone or in combination resulted in fast growth of follicles and onset of heat; however combination treatment had better result. The reduction in blood cortisol level and progesterone priming results in follicles with greater estrogen level with lower interval between the onset of heat and ovulation.
In our experiments, progesterone priming had significant effect on cellularity and ferning probably by increasing the sensitivity to estrogen. Progesterone priming and reduction of cortisol with glycerol and vitamin administration had no effect on bellowing, mucus discharge and vulvar redness, however affected cellularity and ferning characteristics. Thus among various signs of estrus, vulvar redness, ferning and cervical mucous cellularity are better indicators of heat rather than the bellowing and mucus discharge. Estrogen has pro-inflammatory influence on the reproductive tract in that it induces hyperemia, mucous discharge, swelling and redness; cortisol is known for its anti-inflammatory properties. Thus the mitigating effect of cortisol on the intensity of heat as has been found in this study might be due to its anti-inflammatory properties. Progesterone priming, estrogen administration and cortisol level did not affect bellowing and mucus discharge at heat of buffaloes indicating that these two characters are independent of hormone levels beyond the threshold required for the onset of heat.
Synthetic GnRH analogue buserelin acetate is well known to induce the onset of folliculogenesis within two days of administration. Administration of buserelin acetate at the time of CIDR insertion resulted in the presence of mature follicles at the time of CIDR removal while buserelin administration on the day of CIDR removal resulting in onset of folliculogenesis after two days indicating that presence of mature follicles close to the end to progesterone priming results in follicles with greater estrogen content, shorter ovulation time and better heat symptoms. As the time of heat is delayed from the end of progesterone priming it results in poor secondary symptoms of heat and delayed ovulation. Best conception rate was found with progesterone priming with buserelin acetate at the time.