Author(s):

Vikram Ghiyal and AK Bhatia

Abstract: The present investigation was carried out at Research Farm of the Department of Vegetable Science, CCS HAU, Hisar during winter season of 2014-15. The experiment was conducted in randomized block design with three replication comprising of four levels of nitrogen, i.e., 90(N1), 120(N2), 150(N3) and 180(N4) kg/ha and three fertigation frequencies, i.e., every 3rd day (F1), every 6th day (F2) and every 9th day (F3). The per cent plant emergence at 30 (96.33%) DAP, plant height at 60 (49.63cm) DAP, number of shoots per hill at 30 (4.43), 60 (4.68) and 90 (4.68) DAP, leaf area index at 30 (1.21), 60 (6.02) and 90 (5.24) DAP and foliage weight (1.21 kg/m2) were significantly higher with F1. Nitrogen levels exhibited significant difference for growth. The maximum value for per cent plant emergence at 30 (96.89%) DAP, plant height at 60 (49.83 cm) and 90 (54.98 cm) DAP, number of shoots per hill at 60 (4.64) DAP, leaf area index at 30 (1.17) and 90 (5.14) DAP, foliage weight (1.17 kg/m2) and total tuber yield () were maximum with N2. Interaction effect of fertigation frequency and nitrogen levels showed remarkable variation. The maximum leaf area index at 30 (1.43) DAP with F1N2. When fertigation applied at every 3rd day with the application of nitrogen @120 kg/ha was found significantly superior to all other treatments combination.

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