Zhao & Grossart (2024) Enhancing crop yield and microbial diversity in saline-affected paddy soil through 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 amendment under aquaculture wastewater irrigation. European Journal of Soil Biology. https://doi.org/10.1016/j.ejsobi.2024.103681

Saline soils pose a major challenge to global agriculture, especially in rice farming. A recent study published in the European Journal of Soil Biology explores how biochar, a carbon-rich material, can improve saline-affected paddy soils under irrigation with aquaculture wastewater.

The research focused on rice crops grown in soils with controlled salinity (1‰ and 3‰). By adding biochar, the study found significant improvements in both soil health and crop yield. Specifically, rice yields increased by 14.2% at lower salinity and 6.81% at higher salinity. Biochar also enhanced the nitrogen content in rice leaves, leading to better plant growth, including a 45.9% increase in leaf area at higher salinity.

In addition to boosting crop yields, biochar positively impacted soil microbial diversity. It increased the relative abundance of beneficial bacteria such as Firmicutes, while reducing others like Actinobacteria. These microbial shifts play a crucial role in nitrogen cycling and overall soil fertility.

The study highlights the potential of biochar to mitigate some of the negative effects of saline soil, such as reduced crop productivity and increased greenhouse gas emissions. When combined with aquaculture wastewater, biochar could provide a sustainable solution for improving rice production in salt-affected areas.

This research offers valuable insights for future efforts to enhance food security in saline-affected regions through sustainable agricultural practices.