The Impact of Phosphorus Fertilizers on Nutrients Content and Uptake in Lettuce (Lactuca sativa L.) and on Selected Chemical Properties of a Calcareous Soil

A field experiment was conducted to investigate the effect of different phosphorous (p) fertilizers forms and rates on the nutrients content and uptake in head lettuce grown on a calcareous soil. the effect on some selected soil chemical properties (salinity, ph, total n, available p and k) were also investigated. four p fertilizer types (single super phosphate (ssp), di ammonium phosphate (dap), mono ammonium phosphate (map) and a local phosphate rock (pr)) were laid out as main plot treatments, and five p application rates (0, 125, 250, 375, and 500 kg p2o5/ha) as subplot treatments. plant p content significantly influenced by the p fertilizer type and rate. p fertilizer type and rate interaction showed a significant effect on nutrients uptake and soil available p. neither p fertilizer form nor rate demonstrated a significant effect on the other examined soil chemical properties.