Foliar Zn + K application increased flour Zn concentration relatively to foliar Zn alone.
Flour Zn positively correlated with P concentration after foliar Zn + PK application.
Foliar Zn combined with macronutrient tended to increase Fe concentrations.
Zn(Gly)2 did not cause further increase in Zn, Fe concentrations compared with ZnSO4.
Traditional N rate can be appropriately reduced but not affect flour nutritional quality.