BENEFICIAL ASPECTS OF ARBUSCULAR MYCORRHIZAL FUNGUS Rhizophagus irregularis ON PLANT GROWTH AND VIGOUR OF Arachis hypogaea L.

Author(s): Abhinanda Ghosh and Sikha Dutta*

Abstract: Biofertilizers are the organisms which are responsible for the enrichment of soil nutrients quantitatively and qualitatively. One of the most commonly used and ubiquitously distributed biofertilizer is AM fungi. In the present study our main motto was to produce ground nut by using mycorrhizal biofertilizer in low nutrient soil of the Birbhum district, West Bengal. In this study, we selected the plant Lathyrus sativus as a host for the production of AMF inoculum in pot culture. We have isolated the spores of Rhizophagus irregularis (previously known as Glomus intraradices) from the rhizospheric soil of the host plants like Zea mays, Aloe vera and Lathyrus sativus. Pot culture of the selected host plant L. sativus was done and the young seedlings as well as the soil in pot culture were inoculated with the spores of R. irregularis and the mycorrhizal inocula of R. irregularis have been produced in the pot culture as biofertilizer. The ground nut plants were then cultivated in red laterite soil and maintained in pot culture where mycorrhizal inocula of R. irregularis were applied. Field trial was also done by the use of AMF inoculum. The percentage of mycorrhizal root colonization, soil nutrients parameters like nitrogen, phosphorus, potassium, calcium etc. and physiochemical properties of soil like bulk density, specific gravity, percentage of clay, slit and sand had also been studied. It was evidenced that the percent of root colonization by R. irregularis was increased with concomitant increase in soil nutrients parameter like nitrogen, phosphorus, potassium and other microelements.

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