The purpose of this work was to evaluante the calcium (Ca) and boron (B) effects, throught leaf spraying, in the vegetative and reprodutive phases of soybean (Glycine max L. Merril), cvs. FT Cometa e BR 16, on the yield components and physiological quality of seeds. The soil used was an Planossoil, with the follow physical-chemical caracters: K: 1,67mmo<IMG SRC="http:/img/fbpe/cr/v32n1/a06img01.gif">c dm-3, P: 3,5mg dm-3, organic matter: 16,6g dm-3; Ca+Mg content: 18mmo<IMG SRC="http:/img/fbpe/cr/v32n1/a06img01.gif">c dm³ of soil, pH: 4,7 and clay: 11%. The experimental units were plastic trays with capacity for 20kg, manteined close to the field capacity (water content 20%) during the experiment. The treatments consisted of spraying the solution in four phases: pre-flowering, flowering, pos-flowering and pre-harvest. The solution was preapered with CaCl2 (0,5% of Ca) and Na2BO3 (0,25% of B), corrected for pH 7,0. The volume used was 100<IMG SRC="http:/img/fbpe/cr/v32n1/a06img01.gif"> ha-1. The yield components evaluated were legumen number/plant, grain number/legumen and grain weigth/plant. The seeds was evaluated througth field emergence, speed emergence and dry matter weigth of seedlings. Based on results, the conclusions were: a) the Ca and B application increased the grain weight/plant; b) the Ca and B application were not affected the physiological quality of seeds; c) the best results of Ca and B application on yield components were verify in the flowering and pos-flowering phases.
Glicine max; grain yield; emergence; vigor
