Utility of some nitrogen-fixing microorganisms in the phyllosphere of crop plants |
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Authors: | A S Nandi S P Sen |
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Institution: | (1) Department of Botany, University of Kalyani, 741235 Kalyani, India;(2) Present address: Department of Botany, Samilani College, Bankura, W. Bengal, India |
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Abstract: | Summary The utility of spraying some known N2-fixing microorganisms on rice leaves grown both in N-less sand culture and under field conditions was examined. The effect
was compared with that of spraying a phyllosphere N2-fixing isolate of Klebsiella, KUPBR2, and application of nitrogenous fertilizers. All the growth parameters studied including dry weight and N-content were enhanced.
Under field conditions number of tillers was increased by 26% withKlebsiella pneumoniae M5al and by 65% with Aphanothece. The dry weight of the plants was enhanced by 61–119%. The yield per 10 m2 was almost doubled with Aphanothece, Beijerinckia 8007,Mycobacterium flavum, K. pneumoniae M5al and KUPBR2. The increases observed withStreptomyces sp. G12 though less spectacular was significant at 1% level with respect to several growth parameters.K. pneumoniae M5al,M. flavum andStreptomyces sp. G12 exhibited nitrogenase activity both in laboratory culture and in association with rice plants. |
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Keywords: | Aphanothece Beijerinckia Klebsiella Mycobacterium N2-fixation Phyllosphere Rice Streptomyces |
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