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Study on Rhizobium, Azotobacter and Phosphate Solubilizing Bacterial (psb) Population Status in Soils of Different Aezs of Bangladesh (2017-2018)

M. A. H. Bhuiyan
Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh.

M. F. A. Anik
Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

M. Rahman
Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh.

F. Alam
Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

M.E. Ali
Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh.

Abstract/ Executive Summary:

Rhizobium plays a major role in legumes supplying nitrogen through symbiotic nitrogen fixation. Eight soil samples were collected from selected locations of different AEZs of Bangladesh to know the Rhizobium population at different AEZs (6 AEZs) of Bangladesh. Soil samples were collected from BARI Central Farm (AEZ-28); RARS, Jessore (AEZ-11); Codda, Joydebpur (AEZ-28); RHRS, Norsingdi (AEZ-9); ARS, Satkhira (AEZ-13); OFRD, Noakhali (AEZ-19); OFRD, Kuakata, Patuakhali (AEZ-13); OFRD, Cox’Bazar (AEZ-23). Rhizobium was grown in media and Rhizobium colonies were counted. The highest Rhizobium population (5.0 ´ 10⁵g^-1 soil) was found in soils of RHRS, Norsingdi (AEZ-09) and the lowest population (5.0 ´ 10²g^-1 soil) was observed in soils of Satkhira (AEZ-13) and Cox’Bazar (AEZ-23).

Keywords: Rhizobium, Species, AEZ

Location: BARI Central farm, Gazipur, RARS, Jessore, RHRS, Norsingdi, OFRD, Noakhali, OFRD, Kuakata, OFRD, Satkhira and Cox’Bazar

Start Date: 00-00-2017

End Date: 00-00-2018

Program Area: Knowledge Management

Commodity: Bacteria, Soil fertility

Objectives:

To evaluate the distribution and abundance of the Rhizobium species from different AEZs of Bangladesh.

Methodology:

Eight sites were selected considering 6 AEZs for collecting soil samples for Rhizobium population viz. BARI Central Farm (AEZ-28); RARS, Jessore (AEZ-11); RHRS, Norsingdi (AEZ-9); OFRD, Noakhali (AEZ-19); OFRD, Kuakata (AEZ-13); OFRD, Satkhira (AEZ-13); Cox’Bazar (AEZ-23). Rhizobium was grown in media and Rhizobium colonies were counted. Land areas of these agro-ecological zones were recognized on the basis of hydrology, physiography, soil types, tidal activity, cropping patterns, and seasons. Representative soil samples have been collected from different crop fields of these agro-ecological zones. Soils were taken from three different places of each crop field from 0-6 inches depth and then the soils were placed in plastic bags. The plastic bags were pin holed for aeration, and stored in laboratory prior to analysis. Media was prepared for growing of Rhizobium colonies. After serial dilution one ml of solution was poured in a petridish having agar media. The petriplates were incubated three days for counting Rhizobium colonies.

Source of Information: Annual Research Report 2017-2018, Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh.

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Rhizobium population was found in different numbers in different locations. The highest Rhizobium population (5.0 ´ 10⁵g^-1 soil) was found in soils of RHRS, Norsingdi (AEZ-09) and the lowest population (5.0 ´ 10²g^-1 soil) was observed in soils of Satkhira (AEZ-13) and Cox’ Bazar (AEZ-23). Further studies in soils of different AEZs of Bangladesh are needed to verify the Rhizobium population.

Knowledge Management: Report/Proceedings