Abstract: Effect of sulfur on winter wheat was studied in microplot experiment. The results showed that the concentration of sulfur in wheat plant decreased sharply after the peak value at reviving stage. Velocity of sulfur uptaking reached the highest value at booting to earring stage for S sufficient wheat plants, while there appeared two peaks for S deficient wheat induced by nitrogen insufficiency. The total amount of sulfur absorbed, and especially that at booting to earring stage, was far lower for S deficient plants than sufficient ones. Sulfur concentration, velocity of acquiring, and amount of absorption didn't increase even if additional sulfur was applied, once sulfur in soil was sufficient. However, sulfur deficiency was observed in sulfur sufficient soil owing to nitrogen deficiency. The concentration and amount of sulfur in organs varied with development of winter wheat. Leaves always had highest S content in S sufficient plants. But proportion of S in leaves decrease steadily. A part of S in leaves was transported out after earring. The amount and proportion of S in stem increased dramatically after earring.

Key words: Sulfur, Winter wheat, Organ, Uptake