RESPONSE TO SIMPLE SUPERPHOSPHATE AND TOP-PHOS FERTILIZER IN WHEAT TO OXISOIL

Abstract

The limitation of natural resources coupledwith growing demand for fertilizers to sustain increased crop productivity allyto meet world demand for food intensifies the search for greater efficiency infertilizer use. The objective of this study was to evaluate the response ofphosphorus fertilization on wheat plants, noting its influence on the agronomicand nutritional characteristics of wheat and chemical attributes soil. Theexperiment was conducted in a greenhouse with two sources of singlesuperphosphate (P - 18% P2O5 and top-phos - 22/28% P2O5)and P2O5 five doses (0, 50, 100, 150 and 200 kg ha- 1),2 dm3 vessel. For dryweight of shoot gave maximum point buildup doseof 151.25 kg ha-1 P2O5 and dryweight of roots point was the maximum dose of165 kg ha-1 P2O5 independent of fertilizerused. Theapplication of P2O5 levels with superphosphate fertilizerand top-phos increased levels of pH and available soil P and P content, K and Sin the leaf tissue. It is recommended both simplesuperphosphate with 18% P2O5 as the top-phos, considered with 28% P2O5,for phosphate fertilizer in wheat crop by selecting the fertilizer that providebest relation cost-benefit, in this case the superphosphate.