Efeito do pó de rocha e bioestimulante sobre a produtividade do milho safrinha
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The total of fertilizers used in the country 70% are from imported nutrient sources used basically composed of sources of NPK, high concentration and solubility. The use of rock dust in agriculture is an alternative to lessen the impacts caused by the use of chemical fertilizers. Since ground and ground rocks have several benefits, such as improved fertility by remineralization of macro and micronutrients, they increase CTC and increase soil microbiota activity. Because rock dust has slow nutrient release, its association with the biostimulant application provides greater nutrient release savings, achieving allowable release levels at plant absorption velocity. In this context, the objective of the present study was to evaluate a rock corn fertilized maize test associated with the application of biostimulant. The experiment was carried out in the city of Bambuí in a Cambisolic Distroferric RED Latosol. A randomized complete block design with seven effects (different doses of rock dust (3 and 5 tons ha-1), associated or not with the application of biostimulant, fertilization with NPK and control) and four replications totaling twenty eight experimental plots. The variables evaluated were: plant height; ear insertion height; ear diameter; ear length; number of rows of grains per ear; number of grains per row and survey. Data were analyzed by analysis of variance and the media grouped by Scott-Knott test at 5% probability. Under the conditions in which this work was carried out, it can be concluded that the use of rock dust, the application of biostimulants application, interfere in the vegetative development of corn and safrinha that cause greater impact. However, new research should be used with the use of rock dust associated with the application of biostimulants, without the interference of water restriction, so that it can attest to the efficient use of products in the release of chemicals used in the maintenance of water. culture production.
