EFFECT OF BIOFERTILIZERS AND INORGANIC FERTILIZERS ON NITROGEN AND PHOSPHORUS UPTAKE IN ACACIA NILOTICA (L.) WILLD. EX DEL. SEEDLINGS

摘要

The present study was conducted to generate information on effect of inorganic and biofertilizers, alone and in combination, on nutrient uptake in Acacia nilotica seedlings. The treatments comprised of all possible thirty-six combinations of three levels of nitrogen (0,30 and 60 kg N ha '), three levels of phosphorus (0,75 and 150 kg P2Os ha') and four biofertilizers levels (Control biofertilizer, AM fungi, Rhizobium and AM fungi + Rhizobium). The experiment was established in factorial split plot design with nine combinations of N and P in the main-plot and three bio-fertilizer levels and one control in the sub plots with three replications. Inoculation with AM fungi and Rhizobium, singly and dually resulted in nitrogen and phosphorus uptake in shoot and root as compared to uninoculated control. Among different doses of nitrogen and phosphorus, when applied singly, 30 kg N and 75 kg P205 ha1 resulted in maximum N and P uptake by roots and shoots. Dual inoculation of AM fungi and Rhizobium supplemented with 30 kg N and 75 kg P205 ha 1 significantly increased nitrogen and phosphorus uptake by roots and shoot.