International network for natural sciences – research journal
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The effect of inoculating plant growth promoting microorganisms on rice production

By: R. M. Mwashasha, M. Hunja, E. M. Kahangi

Key Words: Rice, Plant growth promoting microorganisms, Concentrations, Inoculants

Int. J. Agron. Agri. Res. 9(3), 34-44, September 2016.

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Plant Growth Promoting Microorganisms (PGPMs) include bacteria and fungi that have the ability to enhance plant growth through several mechanisms. Plant growth is influenced by the interaction between plants and microbes. The role of PGPMs includes solublization of Phosphorus (P), increasing Nitrogen (N) uptake and synthesizing phytohormones such as auxin. The inorganic fertilizer used to increase rice production cause environmental hazards necessitating for an alternative source of fertilizer supplement. The research aimed to evaluate the efficiency of selected microorganisms in improving the yield performance of Basmati 317 rice. The study was conducted in the experimental farm of Jomo Kenyatta University of Agriculture and Technology (JKUAT), Kenya. A split plot experiment arranged in randomized complete block design with two factors; microbial concentrations and inoculants was replicated four times. The concentrations at three levels (109cfu spores-1 ml-1, 107cfu spores-1 ml-1 and 105cfu spores-1 ml-1) comprised the main plots while microbial inoculants (16 and two controls) were the sub-plots. Data was collected on yield attribute parameters such as number of panicles, panicle length and 100 grain weight. Results revealed that the performance of plants inoculated with high microbial concentrations was better in terms of the yield attributes compared to those treated with low microbial concentrations. It was also evident that the number of tillers, panicle length and 100 grain weight of plants treated with species of Brevudimonas, Bacillus, Enterobacter, Trichoderma and Aspergillus, were better than for the control plants. It was concluded that PGPMs inoculants improved the performance of the rice plants’ growth and production.

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