PARCELAMENTO DA ADUBAÇÃO FOSFATADA NA CULTURA DO MILHO EM CERES (GO)

Abstract

Naturally, Cerrado soils have a high potential for phosphorus fixation through adsorption on 1:1 clays and iron and aluminum sesquioxides. Management strategies that aim to reduce this event are a necessity to increase the utilization rate of this nutrient. This work aimed to evaluate the split application of phosphorus doses on the performance of corn in an Oxisol in Ceres - GO. The experimental design used was randomized blocks (DBC), with five replications. The treatments consisted of the planting/covering splits of: 100% and 0%; 75% and 25%; 50% and 50%; 25% and 75%; and 0% and 100% of the recommended dose of P2O5. Only the variables number of rows of grains per ear and the number of grains per row had significant differences for splitting P. Phosphorus applied at 100% at sowing showed better results in terms of stem diameter, weight of 100 grains and productivity, with an increase of 757 kg ha-1 in relation to the 50 and 50% application.