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Azotobacter Population Status: (2016-2017)

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:

Azotobacter may have a greater role to play either as free living organism or as Azotobacterin or other complex forms of fertilizers as substitutes of synthetic and natural nitrogenous fertilizers to alleviate nitrogen deficiency. Fifteen soil samples were collected to know the Azotobacter population in different AEZs of Bangladesh (covering 5 AEZs) viz. BARI Central Farm (AEZ-28), RARS, Jamalpur (AEZ-09), RARS, Jessore (AEZ-11); RARS, Ishurdi (AEZ-11); Farmer’s field, Norail (AEZ-12); Farmer’s field, Faridpur (AEZ-12); Farmer’s field, Pabna (AEZ-11); Farmer’s field, Chuadanga (AEZ-11); RHRS, Chapainawabgonj (Fruit plants) (AEZ-11); RHRS, Patuakhali (Fruit plants) (AEZ-13); ARS, Khulna (Fruit plants) (AEZ-13). Azotobacter was grown in media and Azotobacter colonies were counted. The highest Azotobacter population (2.7 ´ 10⁶g^-1 soil) was found in soils of RARS, Jamalpur (AEZ-09) and the lowest population (5.0 ´ 10⁴g^-1 soil) was observed in RHRS, Chapainawabgonj (AEZ-11), RHRS, Patuakhali (AEZ-13) and ARS, Khulna (AEZ-03), BARI (AEZ-28) soybean experiment.

Keywords: Azotobacter population, Soils, AEZs, Hydrology, Physiography, Agro Ecological Zones, Tidal activity

Location: BARI Central FarmGazipur, RARS, Jamalpur, RARS, Jessore, RARS, Ishurdi, Farmer’s field, Norail, Farmer’s field, Faridpur, Farmer’s field, Pabna, Farmer’s field, Chuadanga, RHRS, Chapainawabgonj (Fruit plants), RHRS, Patuakhali (Fruit plants), ARS, Khulna (Fruit plants), Bangladesh

Start Date: 00-00-2016

End Date: 00-00-2017

Program Area: Crop-Soil-Water Management

Commodity: Soil fertility, Fruit

Objectives:

To know the Azotobacter population status in soils of different AEZs of Bangladesh.

Methodology:

Eleven sites were selected considering 5 AEZs for collecting soil samples to know the Azotobacter population status in soil viz. viz. BARI Central Farm (AEZ-28), RARS, Jamalpur (AEZ-09), RARS, Jessore (AEZ-11); RARS, Ishurdi (AEZ-11); Farmer’s field, Norail (AEZ-12); Farmer’s field, Faridpur (AEZ-12); Farmer’s field, Pabna (AEZ-11); Farmer’s field, Chuadanga (AEZ-11); RHRS, Chapainawabgonj (Fruit plants) (AEZ-11); RHRS, Patuakhali (Fruit plants) (AEZ-13); ARS, Khulna (Fruit plants) (AEZ-13). 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 Azotobacter colonies. After serial dilution one ml of solution was poured in a petridish having agar media. The petriplates were incubated three days for counting Azotobacter colonies.

Source of Information: Annual Research Report 2016-2017, Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh.

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Azotobacter population was found in different numbers in different locations. The highest Azotobacter population (2.7 ´ 10⁶g^-1 soil) was found in soils of RARS, Jamalpur (AEZ-09) and the lowest population (5.0 ´ 10⁴g^-1 soil) was observed in RHRS, Chapainawabgonj (AEZ-11), RHRS, Patuakhali (AEZ-13) and ARS, Khulna (AEZ-13). Further studies in soils of different AEZs of Bangladesh are needed to verify the Azotobacter population.

Knowledge Management: Report/Proceedings