DIFFERENT PHOSPHORUS DOSES IN GRAIN SORGHUM UNDER CERRADO CONDITIONS, GOIÁS, BRAZIL

Sorghum bicolor is an important grain species used for food and feed production, where P a key element/nutrient in production. The effect of increasing phosphorus doses to sorghum Cerrado soil with sandy texture low fertility conditions was evaluated. study conducted at the Pântano Farm, Jataí, Goiás, Brazil. cultivar AG 1085. 0 (control), 40, 80, 120, 160 kg ha-1 P2O5 were used, whose source triple superphosphate 46% P2O5, five replications each, designed random blocks. evaluated variables stem length, diameter, leaf area, shoot dry mass, content, nutrient accumulation, fertilization efficiency, chlorophyll a, b. For mass (g plant-1), expressed (kg ha-1), b (CFI), application had linear effect. analysis variance regression showed quadratic use showing maximum point best dose values ​​of variables. Phosphorus influenced development cultivar. 129 highest efficiency corresponding 82.02%.