Vol. 10, Issue 10 (2021)

Author(s):
Gyanendra Pratap Singh, ML Meena and Taksh Rai Pankaj

Abstract:
Nitrogen, phosphorus and potassium play a vital role in plant metabolic activities in onion which ultimately influence the vegetative growth, yield and quality of bulb and overall performance of crop. In the present experiment three levels of nitrogen i.e. (0, 75,100 kg/ha as N0, N1 and N2, respectively), two levels of phosphorus (0, 50 kg/ha as P0 and P1, respectively) and two levels of potassium (0, 80 kg/ha as K0 and K1, respectively) were applied to see their effect when applied alone and in combination, on performance of onion crop cv. Pusa Madhavi under Lucknow condition, India. The experiment comprised 12 treatments [T1- N0P0K0, T2- N0P0K1, T3- N0P1K0, T4- N0P1K1, T5- N1P0K0, T6- N1P0K1, T7- N1P1K0, T8-N1P1K1, T9- N2P0K0, T10- N2P0K1, T11- N2P1K0, T12- N2P1K1], was replicated thrice and was laid out in randomized block design. It was found that the combined application of highest dose of nitrogen, phosphorus and potassium i.e. 100:50:80 kg/ha (T12 –N2P1K1) was significantly better in the comparison to the other treatments for satisfactory improvement of growth parameters i.e. maximum plant height (49.64 cm), average number of leaves per plant (7.2), diameter of bulb neck (1.35 cm), fresh weight of leaves (21.38 g), fresh weight of bulb (55.33 g),dry weight of leaves (2.52 g), dry weight of bulb (47.53 g), polar diameter of bulb (4.70 cm), Physical parameters i.e. volume of bulb (45.19 ml), specific gravity of bulb (1.11) and yield (1.34 kg/plot) of onion crop cv. Pusa Madhavi followed by T8- N1P1K1 (NPK 75:50:80 kg/ha).