Crescimento de milho submetido à adubação fosfatada via radicular e fosfito via foliar.

Abstract

Phosphate fertilization is known to be of low efficiency due to the strong interaction between this element and the mineral solid phase components of the soil. Therefore, it is necessary to establish strategies to decrease the doses to be applied and to increase the efficiency of the use of P. This work had as objective to evaluate the growth and development of corn with different doses of phosphorus and phosphite via foliar. The experiment was carried out in a completely randomized design, in a 5 x 2 factorial scheme with four replications. In stage v9, the following variables were analyzed: vegetative development of the plant as height and stem diameter, dry mass of shoot, stem and roots, contents and accumulation of phosphorus (P) in these tissues with which it was estimated the efficiency of utilization of P. The corn phosphate fertilization, cultivated in the Luvissol Chromic at the initial stage, is fundamental to increase its growth and the production of dry mass. Phosphate fertilization of the corn in the initial phase of growth favors the levels and accumulations of P in the tissues of the plant. Foliar applied phosphite does not produce any additional benefit in the growth, biomass production or corn phosphate nutrition.