Effect of different sources of nutrients, organic manures and biofertilizers on growth, yield, and nutrient uptake of kharif onion (Allium cepa L.)

An investigation to study the effect of different sources of nutrients on growth, yield, nutrient content and nutrient uptake of kharif onion was carried out at BHU-Krishi Vigyan Kendra, Institute of Agricultural Sciences, BHU (Rajiv Gandhi South Campus), Barkachha, Mirzapur during kharif seasons of 2013–14 and 2014–15. There were 6 treatments and five replications involving two inorganic levels and four organic levels over control (NPK @100:50:0 kg ha−1). Results revealed that significantly maximum plant height, number of leaves, bulb diameter and nutrient uptake is recorded with the application of N (50% through vermicompost-VC + 50% through Urea) + PSB + Azotobacter (T6) followed by the application Control (T1) in both the seasons under investigation. The results also indicated that the highest bulb weight, and bulb yield in both kharif seasons was also obtained with the same treatment (T6) as compared to other treatments.