Su, et al (2024) BiocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More Influences Polyethylene Microplastic-Contaminated Soil Properties and Enzyme Activities. Agronomy. https://doi.org/10.3390/agronomy14122919

Microplastics (MPs), tiny plastic fragments, are a growing concern in agricultural soils due to their harmful impacts on plant growth and soil health. A recent study investigated how biochar, a carbon-rich soil amendmentA soil amendment is any material added to the soil to enhance its physical or chemical properties, improving its suitability for plant growth. Biochar is considered a soil amendment as it can improve soil structure, water retention, nutrient availability, and microbial activity.   More, can alleviate the negative effects of MPs on soybean cultivation and soil properties.

Polyethylene microplastics (PE-MPs) were found to suppress soybean growth, reducing plant height, root length, and biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More across various growth stages. Additionally, MPs degraded soil quality by decreasing nutrient availability (e.g., phosphorus and potassium), reducing soil enzyme activities, and negatively affecting microbial biomass. These changes limit the soil’s ability to support healthy plant growth.

Conversely, biochar demonstrated a remarkable ability to counteract these effects. When added to MP-contaminated soil, biochar improved soybean growth, increased microbial biomass, and restored nutrient cycling enzyme activities. For instance, soil treated with both MPs and biochar showed higher levels of nitrate nitrogen and potassium compared to soils with MPs alone. Enzyme activities related to nutrient cycling also recovered significantly, aiding plant growth.

Biochar achieves these benefits by altering soil pHpH is a measure of how acidic or alkaline a substance is. A pH of 7 is neutral, while lower pH values indicate acidity and higher values indicate alkalinity. Biochars are normally alkaline and can influence soil pH, often increasing it, which can be beneficial More, increasing nutrient retention, and fostering microbial diversity. Although it does not entirely eliminate the detrimental effects of MPs, biochar mitigates much of the harm, promoting a healthier soil ecosystem.

This research highlights the potential of biochar as a practical solution for managing microplastic-contaminated soils, ensuring sustainable crop production and soil health. Future studies should explore long-term impacts and broader applications of biochar in various agricultural systems.