EXPLORING NEW WATER-SOLUBLE POWDER FORMULATION OF RHIZOBIUM AND ARBUSCULAR MYCORRHIZAE MEDIATED NODULATION AND YIELD ENHANCEMENT IN REDGRAM

M. GNANACHITRA¹*, K. KUMUTHA², P. MARIMUTHU³, M. SENTHILKUMAR⁴, K. MARY^5
1Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
²Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
³Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
⁴Agriculture College & Research Institute, Eachangkottai, Thanjavur, 614 902, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
⁵Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
* Corresponding Author : gnanachitradavid@gmail.com

Received : 02-04-2020     Accepted : 27-04-2020     Published : 30-04-2020
Volume : 12     Issue : 4       Pages : 1816 - 1820
Int J Microbiol Res 12.4 (2020):1816-1820

Keywords : Red gram, Rhizobium, AM fungi, Nodulation, Yield enhancement
Academic Editor : Kiranjot Kaur
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Dr K. Ramasamy, former Vice-Chancellor (TNAU), Coimbatore for advised to take up this study in redgram, The Professor and Head, Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, India for providing the new bioinoculant formulations and guidance; the Professor and Head, National Pulses Research Institute, Vamban for the successful conduct of the experiments and providing facilities
Author Contribution : All authors equally contributed

Many legumes form tripartite symbiotic associations with rhizobia and arbuscular mycorrhizal fungi; but still Rhizobium and phosphobacteria are commonly applied bioinoculants in pulse production. In order to study the tripartite association effect of Rhizobium and AM fungi, both pot culture and field experiment was conducted with two different bioinoculant formulations, viz., the existing carrier based and new water soluble powder formulations to enhance the nodulation, nitrogen fixation and yield in redgram. Both in pot culture and field experiment, Rhizobium alone inoculated treatments recorded highest number of nodules/ plant as 7.4 and 10.1 nodules /plant respectively followed by coinoculation with AM fungi. Combined application of Rhizobium with both the formulations of AM fungi recorded the highest grain yield (1362 kg/ha) and performed on par with each other followed by Rhizobium alone inoculated treatments. Similarly, irrespective of the bioinoculants and formulations, all the inoculated treatments recorded increased available N and P content than uninoculated control.

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