The influences of potassium sulfate on maize yield and interaction of nitrogen and potassium

Field experiment was carried out to study the effects of K₂SO₄ application on maize yield,biomass,N and K uptake and their re-use in slightly salinized Chao soil.The results showed that for the tested soil with high available K content, K supply greatly increased the output of summer corn and improved N and K uptake by the plants,but reduced the recycling rate of N and K in the plants significantly at the later growth stage.