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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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20191
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Subject: Seed Science and Technology × Author: BAISHYA, HIMASHRI × End date: 2019 × Start date: 2015 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    EFFECT OF SEED ENHANCEMENT ON SEED ESTABLISHMENT, SEED YIELD AND QUALITY OF DIRECT SEEDED RICE
    (AAU, Jorhat, 2019-07) BAISHYA, HIMASHRI; Borah, Prakash
    An experiment was conducted during the kharif season of 2018 at Instruction cum Research Farm, Assam Agricultural University, Jorhat in split plot design with two seed rates in main plots and ten seed enhancement treatments in subplots replicated thrice. The seed enhancement treatments were also evaluated under laboratory conditions to study their effect on seed quality. All the characters in the laboratory evaluation, namely, speed of germination, seedling height, root length and seedling dry weight varied significantly except for the germination %. Results from the field experiment revealed significant variation among the treatments for all the characters, namely, field emergence (%), seedling height (cm), root length (cm), number of effective tillers, number of seeds/panicle, spikelet fertility (%), 100 seed weight (g), disease incidence (%) and seed yield (kg/ha) except days to 50% flowering. Interaction of the treatments with seed rates was significant for field emergence, seedling height, number of effective tillers, spikelet fertility and seed yield. The yield contributing characters, viz, number of effective tillers and spikelet fertility varied significantly under the two seed rates and showed better performance under the reduced seed rate than under the normal seed rate. Lower incidence of disease was recorded in respect of the treatments combinations with consortium of biocontrol agents (Trichoderma harzianum + Metarhizium anisopliae + Beauveria bassiana). Under both the seed rates, field emergence, seedling height, root length and seed yield showed better performance when treated with enhancements treatments along with a consortium of bio-control agents than those seeds which were treated with the enhancement treatments alone. The seed yield didn’t differ significantly between the two seed rates treatments. Hence, the results indicated that seed rate can be reduced to 56.25 kg/ha (75% of the recommended seed rate) without sacrificing performance in seed yield. Amongst all the treatments, Treatment 9 i.e. Ascorbate priming + Seed treatment with consortium of bio-control agents showed high values for the characters namely field emergence, 100 seed weight and seed yield with respect to the control. Disease incidence was also found to be the lowest in this treatment. Correlation studies revealed that the field emergence (%), number of effective tillers and number of seeds/panicle are significantly and positively correlated with seed yield (kg/ha), thereby indicating the importance of these characters in governing seed yield.