Author(s):

Sanu Kumar Saha, Som Pal Singh and PK Kingra

Abstract: Two promising barley cultivars V₁ (DWRUB 52) & V₂ (PL 807) were sown in Ludhiana, Punjab during rabi season of 2016-17 under factorial split plot design including different sowing dates viz. D₁ (25^th October), D₂ (10^th November), D₃ (25^th November) and three irrigation levels such as I₁ (Recommended), I₂ (Stress at Vegetative Stage) and I₃ (Stress at Anthesis Period) to estimate seasonal consumptive water use of crop vis-à-vis pan evaporation data during entire growing period. Significant differences in seasonal crop water use was observed and maximum water consumption took place under D₃ (381.72 mm) in association with I₁ (395.63 mm) for V₁ (375.07 mm). Water use efficiency with respect to straw and grain exhibited higher value in case of D₂ (25.64 & 12.83 kg/ha/mm respectively) and I₂ (24.88 & 12.25 kg/ha/mm respectively). The total pan evaporation for V₁ was greater for D₂ (446.5 mm) followed by D₃ (399.6 cm) and D₁ (348.5 mm). Linear regression equations explained 65.25, 71.92 and 69.04 per cent variability in leaf area index, dry matter, grain yield respectively with seasonal crop consumptive water use under modified environment.

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