Long-Term Effects of Straw-Biochar Application and Fertilization Gradients on Black Soil Carbon Sequestration via Prokaryote-Fungus-Protist Interactions and Metagenomic-Metabolite Linkages.
Jiang Y, Zhao J, Chen Z, Jiang N, Lu C
Soil Health
Mixing biochar into your garden beds doesn't just feed your plants — it locks carbon into the soil for years, cuts down on disease-causing microbes, and lets you use less fertilizer without sacrificing yield.
Scientists turned crop leftovers into biochar — a charcoal-like material made by burning plant matter without oxygen — and mixed it into farm soil for seven years. The biochar boosted the soil's carbon and nitrogen levels and made the community of tiny organisms living in the soil healthier and less disease-prone. Notably, using a bit less fertilizer than farmers normally apply actually produced a better, more balanced soil ecosystem than using full conventional amounts.
Key Findings
Straw-biochar increased soil total carbon by 15% and total nitrogen by 10% compared to untreated controls over seven years.
Biochar reduced bacterial virulence factors (disease-causing potential) in the soil, while plain straw return increased pathogenic risk.
Fertilizing at 60% of conventional rates (N60) optimized microbial network complexity and minimized pathogen invasion more effectively than full conventional rates, without reducing soil fertility.
chevron_right Technical Summary
A seven-year field experiment in Northeast China found that adding biochar made from crop straw significantly boosts carbon storage in farmland soil, while also reducing harmful soil pathogens. Using slightly less fertilizer than conventional rates further improved soil microbial health without hurting crop fertility.
Abstract Preview
Here, we conducted a seven-year field experiment in black soils of Northeast China to evaluate the effects of carbon (C) management, that is, control, straw return (SD), straw-biochar (BC), and a c...
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