NPK Uptake Studies under Varied Drip Irrigation Regimes and NK Fertigation Levels in Cucumber in Naturally Ventilated Poly House

The present study was conducted in naturally ventilated poly house at Horticulture garden, College of Agriculture, Rajendranagar, Hyderabad, Telangana during rabi 2020- 2021 to standardize the optimum N and K fertigation levels and their effect on growth, yield and uptake of nutrients and to derive the nutrients uptake curves for cucumber under poly house during rabi (yasangi).The experiment was laid out in a split plot design with 12 treatments consist of three irrigation regimes viz.,drip irrigation scheduled at 0.8 Epan (I1), 1.0 Epan (I2) and 1.2 Epan (I3) as main plots and four NK fertigation levels of 75% recommended dose of NK (F1- N112.5 K75), 100% recommended dose of NK (F2- N150 K100), 125% recommended dose of NK (F3- N187.5 K125) and 150% recommended dose of NK (F4- N225 K150) as sub plots and replicated thrice. NPK uptake were significantly higher in irrigation scheduled at 1.2 Epan followed by 1.0 and 0.8 Epan during all stages. Among drip fertigation levels NPK uptake increased with each increment in drip fertigation level from 75% recommended dose of NK to 150% recommended dose of NK at all stages.