GERMINAÇÃO E CRESCIMENTO INICIAL DE DIFERENTES CULTURAS EM FUNÇÃO DE APLICAÇÃO E DOSES DE CÁLCIO E MAGNÉSIO

Abstract

The objective of this work was to evaluate beans, soybeans, corn and sorghum seeds after a biostimulant application composed of calcium and magnesium by seed treatment and paper moistening. The experimental design was completely randomized in a 2 x 5 factorial scheme, two ways of applying CaO oxide (UP and TS) with five Ca doses (0; 750; 1,500; 2,250 and 3,000 mg ha-1 of Ca suspension) with four replications. In the MgO doses (0, 250, 500, 750 and 1,000 mg ha-1 of Mg suspension) the same experimental design was used. The germination speed index, the aerial part, root and total dry masses, aerial part:root dry mass as well as aerial part and root length were evaluated. In the trials with CaO doses by TS and UP in all cultures, all variables analyzed were significative (p <0.05). The trials that used the MgO doses in soybean only the aerial part dry mass, the root dry mass, the total dry mass, the aerial part:root ratio and the aerial part length varied according to the application forms and the interaction MgO doses and application forms. Soybean and bean crops had the best responses to treatment with doses of both nutrients by UP.