Effect of irrigation on yield and water relations of some exotic and indigenous potato varieties

Field experiments were conducted in Grey Terrace soil of Joydebpur and Grey Flood plain soil of Munshiganj, Bangladesh to study the yield and water relations of three exotic (Cardinal, Patrones and Kufri Sindhuri) and three indigenous (Zaubilati, Lalpakri and Dohazari) potato varieties as influenced by three different irrigation levels (0, 1 and 2 irrigations). The exotic varieties yielded higher than the indigenous ones. Tuber yield increased significantly with increasing irrigation number. The yield response to irrigation was more pronounced in exotic varieties as compared to indigenous varieties. Soil water depletions (SWD) was increased with decreased irrigation level and was higher in indigenous varieties under any given irrigation. Total water expense by potato was higher in indigenous varieties and showed an increasing trend with increased supply of irrigation water. The exotic varieties were found to be more efficient in water utilization.