Effect of different levels of irrigation and NPK and S fertigation on NPK and S Content (%) and Uptake (kg ha-1) of onion

The present experiment entitled “Evalution of different levels of NPKS and irrigation for onion for sandy clay loam soils under drip enviroment”was conducted at Instructional farm Barrister Thakur Chhedilal College of Agriculture and Research Station, Bilaspur (Chhattisgarh) during rabi season 2022-23. Results indicated that the different irrigation treatments through drip showed significant variation in.NPK and S content and uptake of onion. The irrigation treatment I1 (80% ETc) found significantly superior over I2 (60%ETc). Irrigation at 80%ETc (I1) gave through drip were recorded NPK and S content% of leaf and bulb. highest leaf content was 1.62%, 0.25%, 1.42%, and 1.21% and highest bulb content was 1.96%, 0.48%, 2.28%, 1.93% respectivally recorded by irrigation I1 (80%ETc) which was superior over I2 (60% ETc). Application of different NPK and S fertigation levels showed significant influence on Uptake of leaves and bulb of onion. Maximum leaves uptake 41.14, 7.62, 36.06 and 30.48 kg ha-1 and bulb uptake on NPK and S are 56.45, 13.89, 67.10 and 56.75 kg ha-1 was obtained by F3 (50% NPK and 7.5 kg ha-1 S as basal + 50% NPK and 7.5 kg S ha-1 through fertigation) when compared to superior over F8, however F5, F2, F4, F1 respectively were found statistically at par. The content and uptake of N, P, K and S in leaves and bulb significantly varied due to different drip irrigation treatments and NPK and S fertigation level.