Agronomic potential of sedimentary proterozoic phosphorites

• Grant number: 20/15957-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2021
• End date: October 31, 2021
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Antonio Carlos de Azevedo
• Grantee: Julia Maria Anzolin Isaac
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

It is true that Brazil, being a country of continental proportions and basically a tropical country, is conducive to the weathering process of their soils, which are generally acidic and poor in nutrients. In this experiment, a sandy sample from Agudos - SP will be used, in which soils with this texture present intense leaching, favoring the loss of soluble fertilizers synthetics. In order to reduce these leaching losses, remineralizers will be used which act by slowly releasing elements for soil fertilization, sustaining the concentration of nutrients in the soil for longer, but at lower levels than fertilizers. That way, this proposal aims to evaluate the agronomic potential of dissolving rock powders from litho types of sedimentary phosphorites of paleo- and neo-proterozoic ages. For Therefore, the conduction of the experiment will be carried out in a greenhouse, comparing the two phosphorites with Triple Super Phosphate (SFT), in four doses. The experiment will total 17 treatments, with 3 repetitions, totaling 51 vessels. Samples taken at the end of cultivation will undergo chemical analysis for soil fertility purposes, total chemistry (for balance of elements), physical and mineralogical of the soil, and total chemistry of plant tissues (aerial part and roots).