Nitrogen Use Efficiency in Sustainable Agriculture: A New Framework

Researchers from the University of Sao Paulo have made significant advancements in understanding nitrogen (N) use efficiency in agriculture. Their study, published in the journal Plants, proposes a multidimensional framework to enhance N use efficiency, mitigate environmental impacts, and facilitate the transition towards more sustainable agricultural systems. The researchers identified key players and regulators of N use efficiency, including enzymes, transporters, and N-responsive transcription factors, and explored biotechnological strategies such as genome editing and novel fertilizers.

Key Takeaways:

• Nitrogen is the primary macronutrient that supports global agriculture, and its use has been revolutionized by the Haber-Bosch process, enabling significant increases in crop yield.
• However, N losses from fertilization led to negative impacts on the environment, and improving crops' N use efficiency has been constrained by the limited understanding of N uptake and assimilation mechanisms.
• Biological approaches, such as N fixation by cover crops and rhizobia symbioses, represent a cornerstone strategy for improving N use efficiency.
• Plant growth-promoting bacteria and arbuscular mycorrhizal fungi can enhance N acquisition by increasing root surface, modulating phytohormone levels, and facilitating nutrient transfer.
• Advances in plant molecular biology have identified key players and regulators of N use efficiency, including enzymes, transporters, and N-responsive transcription factors.
• Emerging biotechnological strategies include de novo domestication by genome editing of crop wild relatives to combine N use efficiency traits and stress resilience back into domesticated cultivars.
• Novel fertilizers with controlled nutrient release and microbe-mediated nutrient mobilization hold promise for synchronizing N availability with plant demand, reducing losses, and increasing N use efficiency.

Statistics:

• The Haber-Bosch process revolutionized the use of synthetic N fertilizers, enabling significant increases in crop yield (according to the study).
• N losses from fertilization led to negative impacts on the environment, as mentioned in the study.
• The study proposes a multidimensional framework to enhance N use efficiency, mitigate environmental impacts, and facilitate the transition towards more sustainable agricultural systems.
• 14 (19) volume of Plants, 2025, features the journal article "Nitrogen Use Efficiency in Agriculture: Integrating Biotechnology, Microbiology, and Novel Delivery Systems for Sustainable Agriculture" (doi: 10.3390/plants14192974).

Sources:

• Brazilian National Council For Scientific And Technological Development
• Coordination For The Improvement of Higher Education Personnel
• University of Sao Paulo
• Plants journal (MDPI AG)
• NewsRx, "Nitrogen Use Efficiency in Agriculture: Integrating Biotechnology, Microbiology, and Novel Delivery Systems for Sustainable Agriculture" (Biotech Week, October 29, 2025)