Abstract
Corn has great relevance for agribusiness as it is used in human and animal food, besides the energy matrix. The objective of this study was to assess the leaf content of macro and micronutrient, accumulation of primary macronutrients, production components and productivity with the application of pelleted organomineral fertilizer in different doses compared to mineral fertilization, in two soils of different textures in the corn crop. Two trials were conducted in the municipality of Uberlândia-MG-Brazil: one located near the highway BR 452 km 141, at the coordinate 18°55′26″S, 48°09′36″W, clay soil. The other at km 640 of BR 365, at coordinate 18°54′05″S, 48°25′20″W, sandy soil. A randomized block design with five replications was used, with five doses of organomineral fertilizer (40, 60, 80, 100 and 120% of the recommended dose of P2O5 for corn) and an additional with 100% of the recommendation of mineral P2O5, total of six treatments and 30 plots. The results showed that, with the exception of phosphorus leaf content, yield in the sandy texture and the number of grains per row in the clay texture, there was no difference between the doses of phosphate organomineral and did not differ from the mineral. Thus, phosphate organomineral is as efficient as mineral for phosphorus supply.
Highlights
Fertilizers play an important role in crop productivity, especially corn (Zea mays), and are among the main limitations of agricultural production in the country
The use of organic matter aims to increase the content of phosphorus in the soil and its availability to plants (Teixeira, 2013)
With the exceptions of the foliar content of phosphorus, the productivity in the sandy texture and the number of grains per row in the clay texture, there was no difference between the doses of phosphate organomineral, as well, these did not differ from the treatment with supply of mineral fertilizer
Summary
Fertilizers play an important role in crop productivity, especially corn (Zea mays), and are among the main limitations of agricultural production in the country. The correct fertilization provides nutrients efficiently to plants, improving growth and positively impacting the harvest of superior quality. The correct use of fertilizers makes it possible to increase production and correct soil and crop limitations. The use of organic matter aims to increase the content of phosphorus in the soil and its availability to plants (Teixeira, 2013). The conversion, both biological and physical, of organic waste and the mixture of mineral nutrients, can make viable the use of pelleted organomineral fertilizers with high phosphorus concentration, to be used in grain production (Benites et al, 2010). Increasing soil fertility and reducing the amount of chemical fertilizers, bringing a set of benefits to agriculture (Teixeira, 2013)
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