A demanda de fertilizantes pela agricultura é crescente, bem como, novas fontes de menor poder impactante ao ambiente. Uma alternativa seria o uso dos remineralizadores de solo (RM), também conhecidos como rochagem. Este trabalho foi realizado com o objetivo de testar a viabilidade agronômica do remineralizador do solo (RM) no sistema de plantio convencional (SPC) e direto (SPD). Os experimentos foram realizados em solo classificado como Latossolo Vermelho Distrófico, sem sistema fatorial com 5 doses (0, 800, 1600, 2400 e 3200 kg ha-1) e duas formas de aplicação (lanço e sulco) e quatro repetições. Parcelas foram distribuídas a campo segundo delineamento de blocos casualisados. Não foram observadas diferenças estatísticas para as análises biométricas e para os atributos químicos do solo diante das aplicações do RM, entretanto, foram observadas diferenças entre as doses do RM para as análises foliares com resultados mais eficientes no SPC. Observou-se também interferência do RM para produtividade da soja no sistema de plantio convencional (SPC) e no sistema de plantio direto (SPD) com melhores resultados observados no SPC. Não houve diferença quanto as aplicações no sulco e à lanço. O RM, mesmo com sua solubilidade lenta, foi eficiente no aumento das concentrações de nutrientes na folha de soja, independente do sistema de cultivo adotado, convencional ou direto.
Palavras-chave: Adubação. Plantios Direto e Convencional. Sulco. Lanço. Produtividade
Abstract
The demand for fertilizers by agriculture is growing, as well as new sources of less impactful power to the environment. An alternative would be the use of soil remineralizers (MR), also known as rocking. This work was carried out with the objective of testing the agronomic viability of the soil remineralizer (MR) in the conventional (SPC) and no-tillage (SPD) system. The experiments were carried out in soil classified as Oxsoil, witho ut factorial system with 5 doses (0, 800, 1600, 2400 and 3200 kg ha-1) and two forms of application (lance and furrow) and four replications. Plots were distributed in the field according to a randomized block design. No statistical differences were observed for the biometric analyses and for the chemical attributes of the soil before the MR applications, however, differences were observed between the MR doses for the leaf analyses with more efficient results in the SPC. It was also observed interference of the MR for soybean yield in the conventional planting system (SPC) and in the no-tillage system (DPS) with better results observed in the SPC. There was no difference in the applications in the groove and the section. The RM, even with its slow solubility, was efficient in increasing the concentrations of nutrients in the soybean leaf, regardless of the cultivation system adopted, conventional or direct. there were for leaf analysis and soybean yield in SPC and SPD. It is concluded, therefore, that the RM has characteristics that make it difficult to solubilize the soil in the short time, however, it changes the accumulation of nutrients by the plant, having faster responses when submitted to applications in areas of soil. conventional planting.
Keywords: Fertilization. Direct Seeding and Conventional Tillage. Furrow. Haul. Yield.