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Assam Agricultural University, Jorhat

Assam Agricultural University is the first institution of its kind in the whole of North-Eastern Region of India. The main goal of this institution is to produce globally competitive human resources in farm sectorand to carry out research in both conventional and frontier areas for production optimization as well as to disseminate the generated technologies as public good for benefitting the food growers/produces and traders involved in the sector while emphasizing on sustainability, equity and overall food security at household level. Genesis of AAU - The embryo of the agricultural research in the state of Assam was formed as early as 1897 with the establishment of the Upper Shillong Experimental Farm (now in Meghalaya) just after about a decade of creation of the agricultural department in 1882. However, the seeds of agricultural research in today’s Assam were sown in the dawn of the twentieth century with the establishment of two Rice Experimental Stations, one at Karimganj in Barak valley in 1913 and the other at Titabor in Brahmaputra valley in 1923. Subsequent to these research stations, a number of research stations were established to conduct research on important crops, more specifically, jute, pulses, oilseeds etc. The Assam Agricultural University was established on April 1, 1969 under The Assam Agricultural University Act, 1968’ with the mandate of imparting farm education, conduct research in agriculture and allied sciences and to effectively disseminate technologies so generated. Before establishment of the University, there were altogether 17 research schemes/projects in the state under the Department of Agriculture. By July 1973, all the research projects and 10 experimental farms were transferred by the Government of Assam to the AAU which already inherited the College of Agriculture and its farm at Barbheta, Jorhat and College of Veterinary Sciences at Khanapara, Guwahati. Subsequently, College of Community Science at Jorhat (1969), College of Fisheries at Raha (1988), Biswanath College of Agriculture at Biswanath Chariali (1988) and Lakhimpur College of Veterinary Science at Joyhing, North Lakhimpur (1988) were established. Presently, the University has three more colleges under its jurisdiction, viz., Sarat Chandra Singha College of Agriculture, Chapar, College of Horticulture, Nalbari & College of Sericulture, Titabar. Similarly, few more regional research stations at Shillongani, Diphu, Gossaigaon, Lakhimpur; and commodity research stations at Kahikuchi, Buralikson, Tinsukia, Kharua, Burnihat and Mandira were added to generate location and crop specific agricultural production packages.

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Subject: Animal Reproduction and Gynecology × Author: Das, Nilotpal × End date: 2017 × Start date: 2017 × Type: Thesis × Thesis Type: M.V.Sc. ×
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    ThesisItemOpen Access
    STUDY ON PROLONGED OESTRUS IN CROSSBRED CATTLE
    (College of Veterinary Science Assam Agricultural University Khanapara, Guwahati-781022, 2017-07) Das, Nilotpal; Bhuyan, Manjyoti
    The study was conducted in crossbred cows maintained in Instructional Livestock Farm (Cattle), College of Veterinary Science, Khanapara, Guwahati and in the private dairy farms located around Guwahati to record the incidence of prolonged oestrus, signs of oestrus, hormonal profiles and blood biochemical constituents, and to evolve a suitable treatment of prolonged oestrus. The incidence of prolonged oestrus in crossbred cows was 14.24 per cent comprising 7.60, 5.04 and 1.60 per cent of 2, 3 and 4 days durations respectively. The different behavioural signs of oestrus exhibited by prolonged oestrous crossbred cows were mounting, bellowing, decreased appetite, restlessness and sniffing of genitalia with a percentage frequency of 60.00, 66.66, 26.66, 100.00 and 20.00 respectively on 1st day of oestrus. The percentage frequency of different behavioural signs of oestrus decreased during subsequent days. The percentage of cows exhibiting mounting, decreased appetite and restlessness signs was 3.33, 5.00 and 10.00 respectively on 4th and 0.00, 1.66 and 3.33 respectively on 5th day. Out of different physical signs of oestrus, the most conspicuous signs were swelling of vulva, pink colour of vaginal mucous membrane, free flowing vaginal mucus, thin consistency of vaginal mucus and clear vaginal mucus. These signs were observed in 68.33 to 100.00 per cent of animals on 1st day of oestrus. Except clear colour of vaginal mucus, the percentage of animal showing other physical signs decrease on subsequent days and no animal showed free flowing and thin consistency of vaginal mucus on 4th day of oestrus. The frequency of occurrence of clinico-gynaecological changes in the genital organs viz., relaxed cervix, opened cervix, good uterine tone, palpable large follicle on right ovary, palpable large follicle on left ovary and tense follicular wall was 100.00, 100.00, 66.66 66.66, 33.33 and 100.00 per cent on 1st day of oestrus. The frequency of occurrence of these signs gradually decreased in subsequent days of oestrus upto 4th day. Statistical analysis showed that level of serum estradiol, progesterone, cortisol, calcium, phosphorus, zinc and cholesterol did not differ significantly between crossbred cows of 2, 3 and 4 days prolonged oestrus groups and between days within group. The mean levels of serum calcium and phosphorus in prolonged oestrous crossbred cows with 2, 3 and 4 days durations increased significantly (P<0.01) after treatment with mineral mixture supplementation and anti stress therapy. However, level of serum zinc increased significantly (P<0.01) in prolonged oestrous cow of 2 days duration and serum cholesterol in 3 and 4 days durations. The conception rate in prolonged oestrous crossbred cows was found to be 45.00, 55.00 and 40.00 per cent for mineral mixture supplementation and anti stress therapy, Buserelin acetate injection and for control group without treatment respectively.