Bioinoculation of native Bradyrhizobium and Aspergillus for assessment of productivity attributes of soybean cultivar JS-335

For the improvment of crop plant growth and soil fertility in an ecofriendly way, bioinoculation is the best practice. Bioinoculation is available both in liquid and solid forms commercially for agriculture purpose but the native rhizobial strains provide better nitrogen fixation as compared to commercial ones. Keeping this view in mind, pot experiments were conducted to study the effect of co-inoculation of native strains of Bradyrhizobium japonicum and Aspergillus niger (plant growth promoting fungi) on yield contributing characters e.g., pods per plant, seeds per pod, dry weight of pods and seeds of soybean cultivar JS-335. This cultivar is commonly grown in the Malwa region of Madhya Pradesh state (India). Before evaluation of plant yield attributes, ten isolates were screened for their nitrogen fixing ability in terms of NOPP (Nodule Occupancy Per Plant), shoot and root lenght, and their dry weight. Overall, 27 pots were run parallel for the experiment. Nitrogen fixing potenial results emphasized that out of ten isolates only three (B1, B2 and B3) isolates were found promising and their nitrogen fixing potenital was statisitcally significant over controls. DMRT test was used for further statistical analysis. Results revealed that coinoculation of indigenous B. japonicum and A. niger significantly increased the yield over the controls in all test parameters. This study also ascertain information that more emphasis be given to the native (indigenous) microbes for the preparation of inoculum rather than the commercial ones.

Author(s): Kumawat DM and Sharma K Manish*

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