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Updated: Jun 30, 2025
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Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
Published on: November 28, 2014
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Biochar influences nitrogen and phosphorus dynamics in two texturally different soils
Rajeev Kumar Gupta1, Monika Vashisht2, R K Naresh3
1School of Agriculture, Lovely Professional University, Jalandhar, 144001, Punjab, India. rajeev.30662@lpu.co.in.
Scientific Reports
|March 20, 2024
Summary
Biochar amendments significantly altered nitrogen and phosphorus availability in soils. Rice straw biochar enhanced nitrate nitrogen more than acacia wood biochar, while both improved phosphorus content.
Area of Science:
- Agricultural Science
- Soil Science
- Environmental Chemistry
Background:
- Nitrogen (N) and phosphorus (P) are essential nutrients for crop production, but agricultural soils often lack sufficient inherent supply.
- Biochar (BC) amendments are increasingly recognized for their potential to enhance nutrient availability in soils through various chemical transformations.
- Understanding how different biochar types and application rates affect N and P dynamics is crucial for sustainable agriculture.
Purpose of the Study:
- To investigate the transformations of nitrogen (N) and phosphorus (P) in clay loam and loamy sand soils amended with rice straw biochar (RSB) and acacia wood biochar (ACB).
- To evaluate the effects of different biochar application rates (0, 0.5, and 1.0% w/w) on soil nutrient dynamics over an incubation period.
Main Methods:
- A controlled soil-biochar incubation experiment was conducted using two distinct soil textures: clay loam and loamy sand.
- Soils were amended with RSB and ACB at rates of 0, 0.5, and 1.0% (w/w).
- Transformations of ammonium N (NH4-N), nitrate N (NO3-N), and total phosphorus (P) were monitored over the incubation period.
Main Results:
- Ammonium N (NH4-N) decreased over time, disappearing more rapidly in biochar-amended soils compared to unamended controls.
- Rice straw biochar (RSB) significantly increased nitrate N (NO3-N) compared to acacia wood biochar (ACB) across both soil types.
- Phosphorus (P) content remained consistently higher in both soils amended with RSB and ACB throughout the experiment.
Conclusions:
- Biochar amendments, particularly RSB, can effectively improve nitrogen and phosphorus availability in agricultural soils.
- The type of biochar and soil texture influence the dynamics of N and P transformations.
- These findings highlight the potential of biochar as a sustainable soil amendment for enhancing crop nutrition.
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