Effect of organic manures and biofertilizers application on growth of onion (Allium cepa L.)

An experiment was conducted at College of Horticulture, S.D. Agricultural University, Jagudan (Gujarat) during the year 2016-17 and laid out in factorial randomized block design with three replications. Sixteen treatment combinations comprising of four levels of biofertilizers viz., PSB @ 1.25 lit/ha, Azotobacter @ 1.25 lit/ha, PSB @ 2.25 lit/ha and Azotobacter @ 2.25 lit/ha, two sources of organic manures viz., 100% RDN through FYM and 100% RDN through neem cake and two methods of application viz., soil application and seedling root dip method were assess under the study. The observations were recorded periodically on growth and available NPK status of soil. All the growth parameters were significantly affected by method of application, biofertilizers and organic manures treatments. Maximum plant height at 45 and 90 DAT, number of leaves per plant at 45 and 90 DAT, neck thickness at 45 and 90 DAT, days taken for maturity, minimum bolting per cent and available NPK status of soil after harvest were recorded with PSB @ 2.25 lit/ha applied as soil application and 100% RDN through FYM.