EFFECT OF NITROGEN LEVELS ON PRODUCTIVITY OF DIFFERENT SORGHUM GENOTYPES UNDER CLIMATIC CONDITIONS OF PAKISTAN

Pakistan is one of the most susceptible countries prune to ongoing and expected climatic changes. Sorghum (Sorghum bicolor L. Moench) is the leading crop of dry areas. A field experiment having six cultivars of sorghum with three different nitrogen doses was carried out at Agricultural Faculty, Gomal University, Dera Ismail Khan during kharif season-2017. The cultivars and nitrogen doses and their interactions significantly affected plant height (cm), leaf area (cm2), crop growth rate (gm-2 day -1), panicle elongation (cm), number of grains per panicle, grain weight (g), biomass production (kg ha-1) and economic yield (kg ha-1). The highest grain yield and yield related parameters were found in sorghum genotype JS-263 with NPK dose of 120:75:60 kg ha-1. This high yielding sorghum cultivar and optimum nitrogen level may be used for higher yield and productivity.