Reducing Fertilizer and Adding Biochar Enhances Soil Health in Jasmine Gardens

A study in southeastern China found that combining biochar amendment with reduced fertilizer use improved soil health in jasmine gardens. The treatment increased soil carbon storage, enhanced bacterial diversity, and boosted enzyme activity, promoting more sustainable agricultural practices and carbon sequestration.

September 19, 2024

1–2 minutes

Yang, et al (2024) Fertilizer reduction and 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 promote soil mineral-associated organic carbon, bacterial activity, and enzyme activity in a jasmine garden in southeast China. *Science of The Total Environment*. https://doi.org/10.1016/j.scitotenv.2024.176300

A recent study published in Science of The Total Environment explores the combined effects of fertilizer reduction and biochar amendment on soil quality in jasmine gardens in southeast China. Researchers investigated whether biochar, a carbon-rich soil additive, could help reduce fertilizer use while improving soil health, with a focus on soil mineral-associated organic carbon (MAOC), bacterial activity, and enzyme function.

The study tested four different treatments: conventional fertilization (CK), biochar amendment without fertilizer (BA), fertilizer reduction (FR), and a combination of fertilizer reduction and biochar (FRBA). Results showed that the FRBA treatment increased MAOC content by nearly 20%, indicating improved carbon storage. Additionally, both BA and FRBA treatments enriched soil bacterial diversity, with species like Lactobacillus and Azospirillum playing a key role in nutrient decomposition and carbon sequestration.

Key soil traits identified as influential for MAOC accumulation included enzyme activities (e.g., β-N-acetyl-glucosaminidase), 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, and bulk density. These findings suggest that biochar, especially when combined with reduced fertilizers, can boost soil health, bacterial communities, and carbon storage without sacrificing agricultural productivity.

This research offers valuable insights for developing sustainable farming practices, promoting carbon neutrality, and optimizing fertilizer efficiency in crop soils.