Interactions of Potassium Fertilization and Straw Return in Modulating Maize Yield and Lodging Resistance.

And their interactions (S × K, Y × S × K) had a highly significant effect on the IDW and IP in the third internode ( Table 1 ).

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Notably, there was no significant difference between the K90 and K120 in maize yield, and the maize yield of S0 showed a decreasing trend from year to year, which means that single potassium fertilizer or excessive potassium fertilizer application could not obtain a sustainable increase in yield.

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