Paddy rice response to phosphorus supply and sowing density in pre-germinated system

Abstract

Paddy rice present elevated importance socioeconomic in Santa Catarina State, however, research about the sowing density and paddy rice response to phosphorus supply are scarce. Thus, this work was the objective to evaluate the paddy rice yield, cultivated in pre-germinated system, in function of sowing density and phosphate fertilization. Experiment was conduct in blocks completely randomized and the treatments are arrange in factorial scheme 4 x 3, with four replications. Was test four sowing density of SCS 121 CL cultivar (60, 90, 120 and 150 kg ha-1) and three phosphorus rates (50, 25 e 0 kg ha-1 of P2O5). The variable evaluated were number of stems per meter square, number of panicle per plant, yield and thousand-grain weight. The results indicated that phosphate fertilization reduce can compromise the important yield compounds, like number of panicle per meter square and thousand-grain weight. Yet, the factors sowing density and phosphorus rate not influence the yield.