Dinâmica de lixiviação de macro e micronutrientes em solo remineralizado com basalto

Abstract

Over the years, Brazilian economic development has been mainly contributed by the great production potential linked to agricultural and mining activities. Although they are two stable economic sectors, the activities do not have interests in common, however, when citing the need for fertilization and fertilization of soils for agricultural production, rock dust presents itself as an interesting compound in supplementation and even replacement of conventional fertilizers. very soluble currently used. In this way, they are generated in high amounts. In addition, it can be considered an attractive product for its ability to slowly release macro and micronutrients contained, which in turn, are essential for soil and plant nutrition. The present work evaluated the leaching dynamics of the macro elements calcium, sodium, potassium, magnesium and phosphorus, and micro elements, copper, iron, manganese and zinc from basaltic rock dust, in a soil cultivated with soybean, simulating the average precipitation of the city of Marmeleiro – PR. For the leaching tests carried out in triplicates, doses of 5, 6, 7, 8, 9 and 10 t ha-1 of remineralizer were assigned, coded in treatments E1, E2, E3, E4, E5 and E6, respectively. It was possible to highlight treatments E1 and E3, equivalent to 5 and 7 ton ha-1, respectively, as contributors to increasing the levels of at least 4 nutrients, namely phosphorus, magnesium, copper, iron, manganese, and zinc, followed by treatments E4 and E5, equivalent to 8 and 9 ton ha-1, which contributed to the increase in the levels of calcium, copper, iron, manganese and zinc, only iron had its content increased by all types of doses implemented, unlike potassium, which did not change its content in any type of treatment applied.