EFFECT OF NITROGEN AND SULPHUR ON THE GROWTH AND YIELD OF ONION

Abstract

A lieki experiment was carried out at Sher-e-langla Agricultural Ulniversity Farm during the kohl season of 2008 to investigate the cIict of nitrogen and sulphur on the growth and yield ol 011101) CV. taherpuri. The soil was silty loam in texture haviig p11 6.2. The experiment was conducted in a RCI3I) itIi three replications. The experiment comprises 4 levels of nitrogen from urea (0 kg. 40 kg, 80 kg and 120 kg N ha S ') and 3 levels of sulphur from gypsum (0 kg. 20 kg and 40 kg S ha' The results revealed that diflèrent levels of' nitrogen and sulphur showed signi [leant variations on the parameters studied during the experiment except plant height (cm) and length of bulb (cm). The ireatment of N 20840 ). 020 kg nitrogen - 40 kg sulphur) gave the highest results (hr all parameters either vegetative or yield contributing characters. The highest plant height (30.19 cm), number ol leaves/plant (8. 11) and largest leaf length (30. 11 cm) were also obtained with the same treatment i.e. N 120 5 •w 11w result indicated that maximum bulb yield (9.8 I t ha of onion was obtained with the treatment NS receiving 120 kg nitrogen and 40 kg sulphur. The highest concentrations of sulphur in the bulb (1 .00 %) and available S in Post harvest soil (26. 10 ppm) were recorded in the Irealnient coml,mation of N5S.1 and N,0S.1 respectively The highest concentrations ot nitrogen in the bulb (2.32 %) and total nitrogen iii post harvest soil (0.12 0/s) were recorded in the treatment combination of Nsj;S.iI) and N l2 ,,S 2t i So, the fertilizer combinations of nitrogen (120 kg ha (40 kg ha') not only gave maxinium growth and yield of onion hut also made the soil ten i Ic and l)roducti\'e.