Eco-Physiological and Productive Response of Deficit Irrigated Potatoes

A comprehensive study on both the eco-physiological and productive response of potatoes to dynamic deficit irrigation is lacking. Therefore, aim was study, over two growing seasons potato cultivars—Arinda Timate, effects five regimes (I0–dry control, I1—irrigated I2—supply 100% maximum evapotranspiration—ETm from tuber initiation up 50% growth 0% ETm end growth, I3—supply I4—supply 75% growth) simultaneously crop physiology (via chlorophyll fluorescence leaf gas exchange traits), above-ground biomass yield, yield its components, water use efficiency (IWUE), source/sink ratio tubers’ dry matter content. Regardless cultivars seasons, in I3 I4 for traits, values comparable with I1 were found. Compared I1, I2 reduced by about 18% but increased IWUE 110%, saving a high amount (about 1500 m3 ha−1 per season). Arinda appeared more susceptible than Timate second part namely I2, an point view, no differences between found view. It possible effectively apply save without compromising yields strongly.