Doses de Termofosfato Magnesiano na soja

Abstract

Soybean cultivation in the Cerrados transformed the region into the largest grain producer, however, in this region predominate acid soils, with low natural fertility, whose low availability of phosphorus in the soil is a major limitation of production. Among the sources of phosphate fertilizer recommended for corrective fertilization are the reactive natural phosphates and thermal phosphates. The objective of this work was to evaluate if doses of magnesium thermal phosphate applied in the sowing furrow interfere in the development and productivity of the soybean. A randomized block design with five doses (0; 150; 300; 450; 600 kg ha-1) and four replications were used. The following morphological characteristics were evaluated: plant height, root length, nodulation, dry mass, number of pods, number of grains per pod, mass of one thousand grains and productivity. The effect of thermal phosphate doses on morphological characteristics, yield components and soybean yield was not verified. It is concluded that the application of magnesium thermal phosphate doses in the sowing furrow does not interfere in the development and production of the soybean crop.