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

The limitation of natural resources coupled with growing demand for fertilizers to sustain increased crop productivity ally to meet world demand for food intensifies the search for greater efficiency in fertilizer use. The objective of this study was to evaluate the response of phosphorus fertilization on wheat plants, noting its influence on the agronomic and nutritional characteristics of wheat and chemical attributes soil. The experiment was conducted in a greenhouse with two sources of single superphosphate (P - 18% P2O5 and top-phos - 22/28% P2O5) and P2O5 five doses (0, 50, 100, 150 and 200 kg ha- 1), in 2 dm3 pots. Shoot dry matter give maximum point buildup dose of 151.25 kg ha-1 P2O5 and root dry matter point is the maximum dose of 165 kg ha-1 P2O5 independent of fertilizer used. Application of P2O5 levels with superphosphate fertilizer and top-phos increase levels of pH and available soil P and P content, K and S in the leaf tissue. Recommend both, simple superphosphate with 18% P2O5 as top-phos, considered with 28% P2O5 for phosphate fertilizer in wheat crop, by selecting the fertilizer that provide best value for money, in this case the superphosphate.