Placing fertilizer in soil layers grows more wheat, better roots
Zhou Y, Ali MF, Zhou B, Yan B, Wu P
Soil Health
The way you bury fertilizer, not just how much you use, can rewire the entire community of microbes clinging to a plant's roots and change how well it grows.
Scientists buried nitrogen fertilizer in layers underground instead of scattering it on top of the soil, and wheat plants responded by growing bigger roots, absorbing more nutrients, and producing more grain. The buried fertilizer also changed which bacteria thrived near the roots, favoring a helpful group linked to two natural plant chemicals that seem to boost soil fertility and plant health. After four years of field testing, the layered approach beat simple surface spreading on every measure that mattered for the crop.
Key Findings
Layered nitrogen fertilization (N1-2-1) increased grain yield, anthesis-stage nitrogen accumulation, and root biomass compared to surface application (N8) over a four-year field experiment.
Layered fertilization reduced overall rhizosphere microbial richness but enriched a specific Flavobacterium-dominated bacterial module linked to improved soil fertility.
Network analysis identified two key root metabolites, beta-thujaplicin and Ingenol mebutate, correlated with yield, root traits, and the beneficial bacterial module.
chevron_right Technical Summary
Applying nitrogen fertilizer in distinct soil layers rather than spreading it on the surface boosted wheat yields over four years by encouraging deeper roots and recruiting beneficial soil bacteria. This layered approach could help farmers grow more wheat with more precisely targeted fertilizer use.
Abstract Preview
Original paper
Layered Nitrogen Fertilization Enhances Wheat Productivity by Reshaping Rhizosphere Processes via Root-Metabolite-Bacteria Coupling.
Layered nitrogen (N) fertilization has been proposed to improve wheat productivity, yet its rhizosphere mechanisms remain unclear. In a four-year field experiment, we compared layered fertilization...
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