Response of four potato varieties to water deficit stress under field condition

Abstract

An experiment was conducted at the Horticultural Research Field of Gazipur Agricultural University, Salna, Gazipur, during November 2016 to March 2017 to observe the responses of different potato varieties under different water deficit stress conditions and to find out the potential potato variety(ies) for achieving the maximum yield under water deficit stress condition. The experiment comprised four potato varieties, namely BARI Alu-7 (Diamant), BARI Alu-8 (Cardinal), BARI Alu-25 (Asterix) and BARI Alu-28 (Lady Rosetta) and three irrigations viz., Single irrigation at 30 days after planting (DAP) (Severe water stress), two irrigations at 30 and 45 DAP (Mild water stress) and three irrigations at 30, 45 and 60 DAP (Normal condition-no water stress). The results revealed that yield reduction under severe water stress condition was minimum in BARI Alu-25 (23.68%), followed by variety BARI Alu-28 (25.68%). The high yield maintenance ability of BARI Alu-25 and BARI Alu-28 under severe water stress was also supported by their higher stress tolerance indices of 0.82 and 0.74, respectively and their lower stress susceptibility indices of 0.58 and 0.55, respectively. BARI Alu-25 produced the highest fresh tuber yield, dry matter percentage, stress tolerance index (STI), lowest yield reduction and lowest stress susceptibility index (SSI) in well watered condition as well as the other two water deficit stress conditions.

Bangladesh J. Agril. Res. 50(1): 23-38, March 2025