Data-driven climate-smart strategies for boosting crop yield and minimizing greenhouse gas emissions by optimizing cropping systems and fertilization practices.
Wu W
Climate Adaptation
Getting the rotation right in your vegetable garden — not just planting more or fertilizing heavier — can simultaneously improve harvests and keep the soil from releasing excess greenhouse gases, a principle this large-scale study confirms at the farm level.
Scientists used a computer model to test different combinations of wheat and maize planting schedules and fertilizer amounts across 40 years of real climate data in northern China. They found that a two-crop rotation — wheat in winter, maize in summer — with moderate fertilizer outperformed both a single crop and a more intensive three-crop system. Using too much fertilizer increased soil carbon storage but also ramped up nitrous oxide, a potent greenhouse gas, so the sweet spot was a carefully tuned middle amount.
Key Findings
The winter wheat + summer maize rotation with moderate nitrogen (90 kg/ha for wheat, 60 kg/ha for maize) achieved the highest climate resilience index score of 0.65, beating both simpler and more intensive systems.
Soil organic carbon peaked at 294.9 kg/ha under the highest fertilization treatment, but higher fertilizer use also drove a steady upward trend in nitrous oxide (N₂O) emissions across all cropping systems.
A triple-cropping system (wheat, summer maize, spring maize) did not outperform the simpler two-crop rotation when environmental costs were factored in alongside yield, suggesting intensification has diminishing climate-smart returns.
chevron_right Technical Summary
Researchers in China found that growing winter wheat followed by summer maize, combined with moderate nitrogen fertilizer rates, delivers the best balance of high crop yields and lower greenhouse gas emissions — outperforming both simpler and more intensive cropping rotations over a 40-year simulation.
Abstract Preview
The conflict between food production and environmental protection calls for climate-smart agricultural solutions. This study investigated data-driven climate-smart strategies for optimizing croppin...
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