Artificial Humic Acid Derived from Microorganisms Promotes Root Growth of Rice Seedlings by Mediating Microbial Communities.
Yu F, Fan B, Li H, Yang F, Teng H
Soil Health
Gardeners and farmers who already compost with straw may soon have access to a supercharged soil amendment made by microbes — one that could cut the need for synthetic fertilizers by turbocharging the living community in your soil.
Scientists created a special soil additive by having microbes break down straw, similar to what happens in a compost pile but more controlled. When they added this to the soil around young rice plants, the roots grew much bigger and bushier — more than twice the root volume in just four weeks. The secret seems to be that the additive woke up helpful soil bacteria and fungi that then worked alongside the plant roots.
Key Findings
Straw-fed microbial humic acid increased rice seedling root volume by 112.6% and root length by 35.6% compared to untreated controls after 28 days.
The treatment significantly boosted activity of three key soil enzymes involved in nitrogen and phosphorus cycling, making more nutrients available to plants.
The amendment enriched beneficial bacterial groups (including Pseudomonas) and improved the stability of the soil fungal community, strengthening plant-microbe partnerships.
chevron_right Technical Summary
A new type of humic acid made by feeding microbes straw dramatically boosted rice seedling root growth in lab conditions, more than doubling root volume compared to untreated plants. It worked by energizing soil enzymes and reshaping the microbial community around the roots in beneficial ways.
Abstract Preview
While artificial humic acid (AHA) benefits soil and crops, the effects of novel microbial-derived AHA on plant root growth remain unclear. This indoor study examined plant-derived, pure microbe-der...
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