Improving Nitrogen Use Efficiency in Wheat: Integrating Agronomic, Genomics, and Remote Sensing for Sustainable Production.
Ma L, Ali MF, Ren X, Han W, Lv X
Crop Improvement
Every loaf of bread you bake carries a hidden environmental cost: the nitrogen fertilizer used to grow that wheat leaks into rivers and the atmosphere at roughly twice the rate the plant actually uses it, and closing that gap is one of the most tractable ways to shrink agriculture's climate footprint.
Wheat plants are surprisingly bad at grabbing the nitrogen fertilizer farmers spread on fields — more than half of it washes away or escapes as greenhouse gases before the plant can use it. Scientists are now combining satellite cameras that can 'see' how hungry a crop is for nitrogen, DNA mapping to find wheat varieties naturally better at absorbing it, and smarter fertilizer timing to fix this. Putting all three tools together could mean growing the same amount of wheat with far less fertilizer, which is better for rivers, the climate, and farmers' wallets.
Key Findings
Only 42–47% of applied nitrogen fertilizer is taken up by wheat crops globally; the rest is lost to pollution and greenhouse gas emissions.
Specific genes — including TaNAC2-5A, TaNPF6.2, and a locus called QMrl-7B — have been identified as promising targets to breed wheat that absorbs nitrogen more efficiently.
Next-generation remote sensing (combining multispectral imaging, LiDAR, thermal infrared, and solar-induced chlorophyll fluorescence with machine learning) can monitor crop nitrogen status in real time without damaging the plant.
chevron_right Technical Summary
Only about half the nitrogen fertilizer applied to wheat fields ever reaches the crop — the rest pollutes waterways and fuels climate change. This review maps out how combining satellite imaging, genetic tools, and smarter fertilizer practices could change that.
Abstract Preview
Improving nitrogen use efficiency (NUE) in wheat is critical for addressing the dual challenges of global food security and environmental sustainability. Globally, only 42%-47% of applied nitrogen ...
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