Manejo de aplicação de fósforo na cultura do milho

Abstract

The Brazilian Cerrado has more than 200 million agricultural hectares and plays a fundamental role in agricultural and livestock production. Being the second largest Brazilian biome, with a significant biodiversity that can be exploited for the production of food, feed, among other purposes. The culture of corn (Zea mays L.) is one of the main cereals grown worldwide, providing products widely used for human, animal and raw materials for industry. Phosphorus (P) is a macronutrient little required by crops, when compared to other macronutrients and plays an important role in the transfer of energy from the cell, in respiration and in photosynthesis for good plant development. This present work evidenced to evaluate the areas with years of cultivation and what would be its productive response in function of the method of supply of phosphorus in the culture of the corn after cultivation of the soybean. When performing phosphate fertilization in different forms of distribution, check which was the best answer between the methods and which stood out in relation to grain yield. The experiment was carried out in strips and had four replicates, the treatments being in the sowing furrow, and the haul, farm pattern and control. All of them, except the control, were fertilized in the previous culture with formulations of NPK (07-40-00), Camag, chicken litter and potassium chloride. In the 2nd crop corn crop, planted on 02/23/2018 and harvested on 08/10/2018, cover fertilization was done with NPK (15-15-15) and (45-00-00). The assessment of nutrient accumulation was performed at R6 when the plant reached the maximum accumulation of dry matter. To assess the best form of distribution, nutrient accumulation, export and grain yield were verified. In order to verify the best form of P distribution, for the conditions of the experiment, no significant difference was observed in the nutritional status of the plants, nor in productivity, in relation to the forms of distribution that offered P by haul, in the sowing furrow or farm pattern.