Resposta agronômica de fertilizante mineral e organomineral

Abstract

The increase in crop productivity is related to the need for fertilizers for nutrition, where almost all of it comes from mineral fertilizers and the need to import raw material makes its cost high. Research linked to the use of organic wastes as nutrient alternatives are ways to mitigate current dependency and promote agricultural sustainability. The objective of this work was to evaluate the agronomic response of organomineral fertilizer doses in comparison to conventional mineral fertilizer, using white oats (Avena sativa) as the indicator plant. The experiment was carried out in a greenhouse using buckets of 7 dm³, filled with dewatering soil, sifted and corrected acidity. The treatments consisted of an organomineral fraction with an organic fraction based on lignite mineral coal, in the formula 07-10-14 and formulated, distributed in 5 doses (0, 9, 18, 27, 36 g pot-¹). The experimental design was completely randomized in a 2x5 factorial scheme in 4 replicates. The variables analyzed were: plant height (cm), shoot dry matter (g vase-¹), stalks (g vase-¹), leaves (g vase-¹) and roots of the aerial part / root and leaf / stem ratio. The organomineral increased the dry mass of aerial part, roots and stems of white oats. Excess nutrients caused toxicity in the mineral source. The organomineral has the potential to replace the mineral fertilizer as a source of nutrients in plants and to increase biometric indexes in white oats (Avena sativa).