Influence of different levels of nitrogen and azospirillum inoculation on direst seeded rice in a vertisol

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dc.contributor.advisorMitra, N.G.
dc.contributor.authorNamdeo, Varsha
dc.date.accessioned2017-02-27T06:13:00Z
dc.date.available2017-02-27T06:13:00Z
dc.date.issued2016
dc.description.abstractThe present investigation entitled “Influence of different levels of nitrogen and Azospirillum inoculation on direct seeded rice in a Vertisol” was carried out in the experimental filed (Vertisol) of the Department of Soil Science & Agrilcultural Chmeitry, JNKVV, Jabalpur during Kharif 2015. The experiment was laid out with total 8 treatment combinations replicated thrice under randomized block design in different 24 plots each of 3 m x 4 m. The treatments were constituted with different combinations of 3 levels of fertilizer nitrogen (50, 75 and 100% of recommended dose of N) and inoculation of carrier based Azospirillum (as inoculated and uninoculated) including one control of unfertilized and uninoculated. The observations were recorded for plant growth parameters viz., length of root and shoot, leaf chlorophyll content, and number of tillers/hill. Different yield parameters were recorded viz., number of grains/ear, test weight of grains and yields of grain and straw. Diazotrophic population of Azospirillum was also counted in the rhizospheric soil. Besides these, chemical and microbial analyses of soil samples (initial and individual plot wise) and plant samples for the different parameters were performed. The data on various parameters were processed and computed statistically for test of significance. The response from the treatment of RDN75%+Azospirillum was recorded statistically superior in enhancing growth of the crop viz., length of root and shoot, chlorophyll content, number of tiller/hill and other plant growth parameters. The same treatment combination of RDN75%+Azospirillum was found statistically and economically best to increase available N content in soil at 45 DAS and at harvest of the crop by 27.05 and 26.04%, respectively over control; total N content in soil at the respective growth stages by 28.22 and 30.31%; N content in plant at 65 DAS stage, grain and straw at maturity by 39.28 ,44.66 and 42.30%, respectively; azospiral population in rhizospheric soil at 65 DAS and at harvest by 2.13 , 1.92 and 1.91 log folds, respectively and yields of grain and straw of paddy by 110.58and 39.44%, respectively. While the treatment of RDN100%+Azospirillum exhibited numerically higher values for the above parameters but these were at par to that of RDN75%+Azospirillum. The improvement in growth parameters and yield components of paddy under study was plausibly attributed to supplementation of nitrogen at moderate level along with inoculation of Azospirillum in combination which made nitrogen and other nutrients and growth factors more available either abiotic and/or biotic means. Further, Azospirillum inoculation might biologically increased production of more plant biomass and development of the root system and finally the yield. Development of root system might increase root length and number of lateral roots, root density and more number of root hairs and its length and consequently the volume of root zone; these all dramatically contributed in greater uptake ability and utilization of nutrients and water.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810002663
dc.keywordsSOIL SCIENCE ,AGRICULTURAL CHEMISTRYen_US
dc.language.isoenen_US
dc.pages55en_US
dc.publisherJNKVVen_US
dc.subSoil Science and Agriculture Chemistryen_US
dc.subjectSOIL SCIENCE AND AGRICULTURAL CHEMISTRYen_US
dc.themeSOIL SCIENCE AND AGRICULTURAL CHEMISTRYen_US
dc.these.typeM.Scen_US
dc.titleInfluence of different levels of nitrogen and azospirillum inoculation on direst seeded rice in a vertisolen_US
dc.typeThesisen_US
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