Effect of inorganics and organics on growth and yield of onion (Allium cepa L.)

The field experiments were conducted for two seasons (rabi 2004-05 and summer 2005) at Regional Agricultural Research Station Bijapur, on medium deep black soil to study the effect of integrated nutrient management on the growth and yield of onion (cv. Telagi Red). The experiment was laid out in a split-plot design. There were 20 treatments involving three  inorganic levels (main), six organic levels (sub), RPP (control-I) and absolute control (no manure and no NPK). Higher level of inorganics i.e., M3 (162:32:148 kg NPK/ ha) produced significantly higher bulb yield (41.55 t/ha) which was on par with M2 i.e., 81:16:74 kg per ha (41.09 t/ha). When compared to RPP none of the inorganics levels were found significant for growth and yield parameters and yield. With organics, significantly higher and on par bulb yield of 40.56, 41.65 and 40.88 t per ha was recorded with FYM 30 t per ha (S2), vermicompost @ 6 t per ha (S4) and poultry manure @ 3 t per ha (S6) respectively,  compared to their respective lower levels. The combination of higher levels of inorganics (M2 and M3) with higher levels of organics (S2, S4 and S6) recorded higher bulb yield. When compared to RPP none of the treatment combinations were found significantly different for growth and yield parameters and yield.