Soil Phosphorus and Corn Development Under Application of Phosphate Sources

Knowledge of the solubility phosphate fertilizers is fundamental for phosphorus (P) recommendation management and choosing laboratory evaluation method nutrient availability in soil according to history fertilization. The aim was evaluate initial development corn plants as a function application triple superphosphate (TSP) natural Arraias (NPA) with without liming incubation time, well available P use extractors Mehlich-1 Mehlich-3. An experiment installed an 8 × 3 2 factorial scheme, being fertilizer times (180, 140, 100, 80, 60, 40, 20, 0 day(s) before planting), sources (control—without P, TSP NPA) refers limestone (with limestone). Were evaluated shoot root dry matter, analysis Ca, Mg, Zn roots. In soil, levels were determined by Mehlich-3 extractors. There greater accumulation all times. NPA allowed lime. previous did not favor efficiency this source, neither corrected acidity nor its original acidity. proved be adequate determine content fertilized NPA.