Concentração de cálcio e potássio nas folhas de trigo quando aplicados via foliar

Abstract

The wheat crop has great food importance in the world, so the need to guarantee better grain quality and foliar fertilization is a possibility to fill some nutrients, with greater need of the crop. In view of this, this work aims to evaluate the increase in the concentration of calcium and potassium in the leaves, when applied in the tillering, rubbering and beginning of grain filling stages, using potassium chloride and calcium chloride at a concentration of 0.5 % (m/v). Leaf analyzes were performed by flame photometry, with filters for calcium and potassium, and the data submitted to the 5% Tukey test. The results obtained showed that there was a higher concentration of calcium in the leaves when applied 80 days after sowing in the flowering phase, but already with a significant increase from the application on 60 days after sowing, as for potassium there was a significant increase in the concentration of the elements when applied 80 days after sowing, coinciding with the flowering phase in which the plant needs greater amounts of this nutrient. It is concluded that the foliar application of calcium and potassium in the flowering phase provides greater accumulation of these nutrients in the leaves, that is, the phase in which the plant absorbs a greater amount of these nutrients via the leaves.