IRRIGATED RICE RESPONSE TO FERTILIZATION ON LOWLAND SOILS

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 w as conducted to evaluate irrigated rice response to fertilization on s ix lowland soils collected from Goias and Tocantins states in differen t locations. The fertilizer levels tested were: control (A(0)); 50 N 50 P2O5 + 40 K2O + 20 FTE-BR 12 in mg/kg soil (A(1)); 100 N + 100 P2O 5 + 80 K2O + 40 FTE-BR 12 in mg/kg soil (A(2)); and 200 N + 200 P2O5 160 K2O + 80 FTE-BR 12 in mg/kg soil (A(3)). Dry matter production, g rain yield, and yield components were significantly increased with fer tilization and varied from soil to soil.