Effect of PRD irrigation method and potassium fertilizer application on corn yield and water use efficiency

TREATMENTS:

IRRIGATION:

FI (full irrigation)

variable partial root zoon drying (PRD-V)

fixed partial root zoon drying (PRD-F)

K FERTILIER

0 kg ha^-1

150 kg ha^-1

300 kg ha_-1

1. the full irrigation resulted in significantly higher grain yields than both PRD treatments.

 2. the highest WUE and IWUE were obtained in PRD-V and 300 kg potassium/ha.

3. the lowest WUE and IWUE were obtained in FI and 0 kg potassium/ha.

4. Full irrigation and PRD-Fix produced the lowest and the highest ABA concentration at any potassium levels