Effect of Phosphatic Fertilizers on Chemical Composition and Total Phosphorus Uptake by Wheat (Triticum aestivum L.)

Wheat (triticum aestivum l.) was grown in earthen pots containing soil of balkasar soil series (sandyloam) in green house at the department of soil science and swc, pir mehr ali shah arid agricultureuniversity, rawalpindi during rabi season, 2007. the crop was treated with two levels of phosphorus(40 and 80 kg p ha-1 ) in the form of ssp, tsp, np and dap. a basal doze of 100 kg n and 60 kg k ha-1 was applied as urea and murate of potash (mop) respectively. chemical composition of wheat plantsshowed that all the parameters were significantly improved by addition of p except the phosphorusconcentration (%) in wheat straw and potassium conc. (%) in wheat grain. similarly phosphorus uptakewas increased with the increased level of phosphorus application. it was concluded from the study thatdifferent sources and levels of phosphorus has significant effect on the npk contents of wheat and totalp uptake by wheat plants. among all the sources and levels of phosphorus, 80kg p ha-1 as singlesuperphosphate (ssp) showed superiority over triple superphosphate (tsp), nitrophos (np) anddiammonium phosphate (dap) on phosphorus deficient soil of balkasr area of tehsil chakwal.