Thumbnail Image

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.

Browse

20181
Reset filters
Subject: Crop Physiology × Author: Baishya, Navanita × End date: 2018 ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    RESPONSE OF BLACK GRAM GENOTYPES TO PLANT GROWTH REGULATORS UNDER LATE SOWN CONDITIONS
    (AAU, Jorhat, 2018-07) Baishya, Navanita; Kalita, Prakash
    A pot experiment was carried out during the kharif season of 2017 with five black gram genotypes in the stress physiology premises of Department of Crop Physiology, AAU, Jorhat-13. Five black gram genotypes viz., LBG-752, PU-30, PU-40, AZAD URD-3 and LBG-645 were sown at three different dates viz., 15th September (recommended date of sowing i.e. D1), 1st October (15 days delayed beyond recommended date of sowing i.e. D2), and 15th October (30 days delayed beyond recommended date of sowing i.e. D3) and were treated with water spray (control), 50 ppm GA3 and 500 μ mole/lit salicylic acid at 20 DAS and 15 days there after. The objectives of the experiment was to evaluate the physiological performance of black gram genotypes under late sown situation and to examine the influence of some plant growth regulators in improving productivity of black gram genotypes under late sown conditions .Significant variations were recorded due to the genotypes, treatments (plant growth regulators) as well as dates of sowing in terms of various parameters namely leaf area, leaf number, plant height, root volume, root surface area, root length, number of nodules, whole plant biomass, leaf total chlorophyll content, in vivo leaf nitrate reductase activity, lipid peroxidase activity, proline content, number of pods per plant, number of seeds per pod, seed yield and harvest index. The interaction between genotypes and growth regulator treatments was also found to be significant for these traits. The genotypes responded differently towards the dates of sowing for the traits namely leaf area, plant height, root volume, root surface area, whole plant biomass, total chlorophyll content, lipid peroxidase activity, hundred seed weight and seed yield and the interaction among genotypes, plant growth regulators and sowing dates was found to be significant in terms of plant biomass content at harvest. In general, all the traits excepting lipid peroxidase activity exhibited a declining trend with delayed dates of sowing compared to that of recommended date of sowing. The genotype LBG-645 showed the best yield performance followed by AZAD URD-3 when sowing was done in the recommended date as well as in delayed dates. On the other hand, the genotype PU-40 registered the lowest yield performance in both the situations. The GA3 treated plants showed the best performance for most of the traits as compared to salicylic acid treated plants and water spray under all the sowing dates. The combination of LBG-645 with GA3 treatment recorded the best results for most of the traits under all the three dates of sowing. In the case of the recommended date of sowing, the values of seed yield in LBG-645, AZAD URD-3 and PU-40 with GA3 treatment were 12.96 g plant-1, 10.39 g plant-1, 5.96 g plant-1 respectively. With second date of sowing (1st October) the corresponding seed yield values were 11.18 g plant-1, 7.04 g plant-1, 4.75 g plant-1 respectively. When the sowing was done on 15th October, the GA3 treated plants of LBG-645, AZAD URD-3 and PU-40 recorded 8.61 g plant-1, 4.53 g plant-1, 4.51 g plant-1 respectively. The higher values of grain yield in LBG-645 with applied GA3 may be related to its better performance for the traits namely leaf area, root surface area, whole plant biomass, leaf total chlorophyll content, in-vivo leaf nitrate reductase activity and harvest index. From the correlation study also positive and significant correlations were recorded in D1, D2 and D3; between seed yield and leaf area (0.770**, 0.695**, 0.727**), seed yield and root surface area (0.736*, 0.796**, 0.541**), seed yield and whole plant biomass (0.790**, 0.638**, 0.723**), seed yield and total leaf chlorophyll content (0.833**, 0.805**, 0.673**), seed yield and in-vivo leaf nitrate reductase activity (0.813**, 0.784**, 0.705**), seed yield and harvest index (0.983**, 0.083**, 0.987**).