Abstract

Author:
Arpita Roy, Mohammad Kabirul Islam, Md. Rafiq Uddin, Md. Shahin Hossin, and Md. Sagirul Islam Majumder

Doi: 10.26480/sfna.02.2025.42.47

This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Phosphorus (P) is one of the major nutrient elements required for plant growth and development. Phosphorous content is low in both acidic and alkaline soils due to its fixation characteristics. Low phosphorus availability in coastal soils is a key constrains for crop production. Generally, farmers are addressing this problem by application of chemical fertilizers. The synthetic phosphorous fertilizers pollute environment and adversely affected soil fertility. To fulfill the phosphorous requirement in coastal soils, 12 fungi were isolated. They are designated as PSF1, PSF2, PSF3, PSF4, PSF5, PSF6, PSF7, PSF8, PSF9, PSF10, PSF11 and PSF12. Isolates were Aspergillus sp. and Penicillium sp. Among them, 6 potential isolates were selected for bio inoculants based on their phosphate solubilizing activities. These isolates were PSF2, PSF5, PSF6, PSF8, PSF10 and PSF12. Though, phosphate solubilizing potential of the isolated fungi was investigated but effect of some important edaphic and climatic factors on their growth and development are not evaluated. Therefore present study aimed to evaluate the effect of edaphic and climatic factors on the growth and development. Total N and P content in soils were analysed by Semi-micro Kjeldahl and colorimetric method respectively. Growth pattern and effect of temperature were also evaluated using Potato Dextrose Agar medium. Results revealed that both Aspergillus sp. and Penicillium sp. could grow and survive at higher temperature (30-35⁰C). Total soil N and P also effect the growth and development of fungal isolates. These isolates were suggested to apply as phosphatic biofertilizer in tropical and sub-tropical environment.