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Development of a Regression Equation to Measure the Relative Efficiency of P- Mobilization by Phosphatase, Phytase and Organic Acids

Author: Amita Gharu Dhariwal and J.C. Tarafdar

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Abstract

It is important to know the relative contribution of phosphatases, phytase and organic acids which enable us to distinguish their individual importance in P mobilization. Therefore, we have developed a regression equation to understand the relative contribution of acid phosphatase, alkaline phosphatase, phytase and organic acids towards the P mobilization/solubilization from different organic matter soil. Our result suggested that acid phosphatase was most effective P mobilizers followed by phytase except under low soil organic matter condition where phytase was dominant P mobilizers. Among the organic acids, formic acid was most effective in P solubilization followed by citric acid while malic acid was found to be poor contributor under P solubilization. The effects of organic acids are found to be more under low organic P soil.

Keywords

Organic acids, Phosphatases, Phytase, P mobilization, P solubilization, Regression equation

Conclusion

The present study evaluates a regression equation regarding the relative contribution of all four important P mobilizing/solubilizing agents (acid phosphatase, alkaline phosphatase, phytase and organic acids) present in soil after originating from both plant and microbial sources. The data indicates the relative contributions of all the agents under different soil organic matter and low P conditions. The results have the indication that although some of the agents are more effective under certain soil conditions but all four of them are equally important for soil P mobilization in one way or other for plant nutrition. The present findings also indicate that under agricultural settings phosphatases group of enzymes and organic acids plays an important role in P acquisition especially from native organic sources.

References

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How to cite this article

Amita Gharu Dhariwal and J.C. Tarafdar (2023). Development of a Regression Equation to Measure the Relative Efficiency of P- Mobilization by Phosphatase, Phytase and Organic Acids. Biological Forum – An International Journal, 15(4): 544-549.