Author(s):

Ram Vachan and SM Tripathi

Abstract:
The present experiment was conducted in the sandy loam soils during rabi season in 2015-16 at garden of department of horticulture, C.S. Azad University of Agriculture and Technology, Kanpur to study the effect of N, P and K levels with biofertilizers on growth, yield and economics of onion crop. The experiment was laid in Randomized block design with the three replications for onion (Allium cepa L.) cv. NHRDF Red 2 and the treatments were consisted of three different levels of chemical fertilizers viz., 100 per cent RDF (i.e. N, P and K @ 150:80:100 kg ha^-1), 75 per cent and 50 per cent along with biofertilizers like Azospyrillum and PSB. Among the various treatments the treatmnt T₁₃ viz. 100 per cent RDF + Azospyrillum + PSB, has recorded significantly higher plant height, length of leaves, number of leaves, diameter of bulb, shoot thickness, fresh weight per plant and fresh weight per bulb and shoot weight at 50, 75 and 100 DAT. The bulb yield and yield components such as bulb length, bulb diameter and bulb weight were recorded significantly higher in T₁₃ than the other treatments. Treatment T₁₃ has recorded significantly higher gross returns as well as net return but highest B:C ratio was observed in 75 per cent RDF + Azospyrillum + PSB treatmnt T₉ from onion over all the treatment

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