Replication data for: Effect of partial root-zone drying irrigation timing on potato tuber yield and water use efficiency

However, questions remain as to the effect of the water restriction initiation timing and the level of alternate water restriction on the response of the potato crop. In this study, we tested: two PRD treatments with 25% (PRD25) and 50% (PRD50) of total water used in full irrigation (FI, as control), and a deficit irrigation treatment with 50% of water restriction (DI50).

Two water restriction initiation timings were tested at: 6 weeks (WRIT6w) and 8 weeks (WRIT8w) after planting. Osmotic potential, osmotic adjustment, relative water content and chlorophyll concentration were assessed in four dates during the growing period. PRD50 initiated at WRIT6w showed the highest WUE without a tuber yield reduction respect to the control.