RESUMO: O conhecimento da variabilidade da nutrição de plantas e da produtividade em áreas cultivadas com plantas de milho que apresentam alta produtividade pode fornecer importantes subsídios na racionalização do uso de insumos e auxiliar no manejo da fertilidade do solo. Essa pesquisa tem como objetivo determinar os padrões de extração e de exportação de nitrogênio (N), fósforo (P), potássio (K), cálcio (Ca), magnésio (Mg) e enxofre (S) por lavouras de milho de alta produtividade. Quinze talhões de milho cultivados sob sistema convencional e que apresentavam alto potencial produtivo foram amostrados no ano agrícola 2014/2015 na região do Alto Paranaíba (MG) e avaliaram-se a produtividade e a extração e exportação de N, P, K, Ca, Mg e S. Os acúmulos de N, P, K e S em grãos e extração total tiveram efeitos positivos na produtividade da cultura do milho. A massa de mil grãos foi o componente de produtividade mais importante na definição da produtividade.A extração e exportação de N, P, K e S aumentaram linearmente com o aumento da produtividade. Os resultados fornecem dados importantes sobre a absorção e partição de nutrientes dos híbridos atuais e permitem aprimorar as recomendações de adubação para produção de grãos de milho.ABSTRACT: Knowledge on the variability of plant nutrition and productivity in corn plantations with high productivity may provide important subsidies in the restructuring of inputs and in the management of soil fertility. Current research determines extraction and export standards of nitrogen, phosphorus, potassium, calcium, magnesium and sulfur in high productivity corn plantations. Fifteen corn rows cultivated within the traditional system, featuring high productivity, were sampled in the Alto Paranaíba, MG, Brazil, for the agricultural year 2014/2015, and the productivity, extraction and export of N, P, K, Ca, Mg and S were assessed. Accumulation of these macronutrients in the grains and total extraction had positive effects in corn productivity. Mass of one thousand grains was the most relevant productivity´s component. N, P, K and S extraction and export increased linearly with increase of productivity. Results provide important data on the absorption and partition of nutrients of hybrids and allow the improvement of fertilizing recommendations for corn production.

High yield corn has an increased demand for micronutrients, which requires updating knowledge of the nutritional demand patterns of the crop, especially under high production conditions. The objective of the currentstudy was therefore to determine the absorption and export patterns of copper (Cu), manganese (Mn), zinc (Zn) and iron (Fe) for high yield corn crops. Fifteen corn fields with high productive potential were sampled in the Alto Paranaíba, region, Minas Gerais, in the agricultural year 2014-2015. The following variables were evaluated: productivity, plant population, rows of grain per ear, grain per row, grain per ear, mass of one thousand grains, vegetation dry mass, dry mass of grains and total dry mass of the plant, besides the accumulation of micronutrients in the vegetative part and grains, and total micronutrient accumulation per whole plant. The grain and Cu, Mn, Zn and Fe harvest indices were also calculated. The data were submitted to descriptive statistics, Pearson coefficient linear correlation was calculated at the to 5% level and submitted to regression analysis. Cu and Zn absorption and export increase linearly with increased productivity. Micronutrient accumulation in high productivity maize is, in decreasing order, in the vegetative part: Fe> Mn> Zn> Cu; while in the grains and in the whole plant: Fe> Zn> Mn> Cu. Zn is the micronutrient with the highest harvest index.