Irrigated rice response to fertilization on lowland soils

Abstract

In Brazil, there are large areas of lowland having great potential to increase agricultural production, if adequate management practices are adopted, especially adequate fertilization. A greenhouse experiment was conducted to evaluate irrigated rice response to fertilization on six lowland soils collected from Goiás and Tocantins states in different locations. The fertilizer levels tested were: control (A₀); 50 N + 50 P₂O₅ + 40 K₂O + 20 FTE-BR 12 in mg/kg soil (A₁); 100 N + 100 P₂O₅ + 80 K₂O + 40 FTE-BR 12 in mg/kg soil (A₂); and 200 N + 200 P₂O₅ + 160 K₂O + 80 FTE-BR 12 in mg/kg soil (A₃). Dry matter production, grain yield, and yield components were significantly increased with fertilization and varied from soil to soil.