Split application of polymer-coated urea combined with common urea improved nitrogen efficiency without sacrificing wheat yield and benefits while saving 20% nitrogen input.

M1 showed a trend of improving N uptake compared with M2 and M3 from seeding to jointing stage.

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With N reduction by 10%−20%, the stem and tiller number in M4−M5 showed a decreasing trend compared with M3, but all showed no significant difference at different stages.

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