Mota & Silva (2024) Biochar–Nitrogen Composites: Synthesis, Properties, and Use as Fertilizer for Maize. AppliedChem. https://doi.org/10.3390/appliedchem4020011

Researchers Caio Pereira Mota and Carlos Alberto Silva from the Universidade Federal de Lavras, Brazil, have recently published a study on the synthesis and effectiveness of biochar–nitrogen composites as fertilizers for maize. Their study, conducted under greenhouse conditions, reveals promising methods to improve nitrogen use efficiency and support robust maize growth, offering a sustainable alternative to traditional nitrogen fertilizers.

Nitrogen, a crucial element for crop growth, is often lost to the environment due to its reactive nature. This not only increases fertilization costs but also risks environmental contamination. To combat these issues, the study explored biochar–nitrogen composites made from chicken manure and leguminous cake pyrolyzed at 300 °C and enriched with various nitrogen sources like ammonium sulfate, urea, and diammonium phosphate (DAP).

The composites were tested for their chemical properties and nitrogen release capabilities. Remarkably, composites formulated with DAP at specific doses were as effective as higher doses of traditional nitrogen sources, showcasing their potential to reduce the overall nitrogen input while maintaining crop yield. This was attributed to the slow and synchronized release of nitrogen, matching the maize’s growth needs more efficiently than conventional nitrogen fertilizers.

The findings underscore the dual benefits of biochar–nitrogen composites: enhanced maize 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 and reduced environmental impact due to minimized nitrogen loss. The study suggests that these composites are a viable option for maintaining high agricultural productivity, especially in regions like Brazil that rely heavily on imported nitrogen fertilizers.

This research not only highlights the importance of optimizing fertilizer composition and application to meet crop demands but also aligns with global efforts to enhance food security sustainably amid climate challenges. Biochar–nitrogen composites could thus play a critical role in future agricultural practices, potentially revolutionizing how we nourish crops and manage soil fertility.