查看文章

The effect of ‘partial root drying’ (PRD) compared with other irrigation strategies, viz. full irrigation (FI) and deficit irrigation (DI), on morphological and physiological characteristics of potato (Solanum tuberosum L. cv. Folva) were investigated at tuber initiation stage. Potatoes were grown in pots with roots split equally between two soil columns. In FI, the whole root system was irrigated at 100% of evapotranspiration (ET_full); in DI 50% of ET_full was irrigated to the whole root system; in PRD 50% of ET_full was irrigated to one soil column while the other was allowed to dry, and irrigation was shifted when 80–85% of plant available water in the dry side had been used. Midday leaf water potential was similar for all treatments at 9 days after onset of treatments (DAT), while it was significantly lower in PRD than in FI and DI plants at 21 DAT. Photosynthesis, stomatal conductance, and transpiration were generally greater in FI …